libstdc++-v3/acinclude.m4

   1
   2 dnl
   3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
   4 dnl
   5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
   6 dnl end of configure.  This lets tested variables be reassigned, and the
   7 dnl conditional will depend on the final state of the variable.  For a simple
   8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
   9 dnl
  10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
  11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
  12   m4_divert_text([glibcxx_diversion],dnl
  13    AM_CONDITIONAL([$1],[$2])
  14   )dnl
  15 ])dnl
  16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
  17
  18
  19 dnl
  20 dnl Check to see what architecture and operating system we are compiling
  21 dnl for.  Also, if architecture- or OS-specific flags are required for
  22 dnl compilation, pick them up here.
  23 dnl
  24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
  25   . $glibcxx_srcdir/configure.host
  26   AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
  27   AC_MSG_NOTICE([OS config directory is $os_include_dir])
  28 ])
  29
  30 dnl
  31 dnl Initialize the rest of the library configury.  At this point we have
  32 dnl variables like $host.
  33 dnl
  34 dnl Sets:
  35 dnl  SUBDIRS
  36 dnl Substs:
  37 dnl  glibcxx_builddir     (absolute path)
  38 dnl  glibcxx_srcdir       (absolute path)
  39 dnl  toplevel_srcdir      (absolute path)
  40 dnl  with_cross_host
  41 dnl  with_newlib
  42 dnl  with_target_subdir
  43 dnl plus
  44 dnl  - the variables in GLIBCXX_CHECK_HOST / configure.host
  45 dnl  - default settings for all AM_CONFITIONAL test variables
  46 dnl  - lots of tools, like CC and CXX
  47 dnl
  48 AC_DEFUN([GLIBCXX_CONFIGURE], [
  49   # Keep these sync'd with the list in Makefile.am.  The first provides an
  50   # expandable list at autoconf time; the second provides an expandable list
  51   # (i.e., shell variable) at configure time.
  52   m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src doc po testsuite])
  53   SUBDIRS='glibcxx_SUBDIRS'
  54
  55   # These need to be absolute paths, yet at the same time need to
  56   # canonicalize only relative paths, because then amd will not unmount
  57   # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
  58   glibcxx_builddir=`${PWDCMD-pwd}`
  59   case $srcdir in
  60     [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
  61     *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
  62   esac
  63   toplevel_srcdir=${glibcxx_srcdir}/..
  64   AC_SUBST(glibcxx_builddir)
  65   AC_SUBST(glibcxx_srcdir)
  66   AC_SUBST(toplevel_srcdir)
  67
  68   # We use these options to decide which functions to include.  They are
  69   # set from the top level.
  70   AC_ARG_WITH([target-subdir],
  71     AC_HELP_STRING([--with-target-subdir=SUBDIR],
  72                    [configuring in a subdirectory]))
  73
  74   AC_ARG_WITH([cross-host],
  75     AC_HELP_STRING([--with-cross-host=HOST],
  76                    [configuring with a cross compiler]))
  77
  78   AC_ARG_WITH([newlib],
  79     AC_HELP_STRING([--with-newlib],
  80                    [assume newlib as a system C library]))
  81
  82   # We're almost certainly being configured before anything else which uses
  83   # C++, so all of our AC_PROG_* discoveries will be cached.  It's vital that
  84   # we not cache the value of CXX that we "discover" here, because it's set
  85   # to something unique for us and libjava.  Other target libraries need to
  86   # find CXX for themselves.  We yank the rug out from under the normal AC_*
  87   # process by sneakily renaming the cache variable.  This also lets us debug
  88   # the value of "our" CXX in postmortems.
  89   #
  90   # We must also force CXX to /not/ be a precious variable, otherwise the
  91   # wrong (non-multilib-adjusted) value will be used in multilibs.  This
  92   # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS.  And as a side
  93   # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
  94   # that ourselves.  Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
  95   #
  96   # -fno-builtin must be present here so that a non-conflicting form of
  97   # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
  98
  99   m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
 100   m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
 101   m4_define([_AC_ARG_VAR_PRECIOUS],[])
 102   save_CXXFLAGS="$CXXFLAGS"
 103   CXXFLAGS="$CXXFLAGS -fno-builtin"
 104   AC_PROG_CC
 105   AC_PROG_CXX
 106   CXXFLAGS="$save_CXXFLAGS"
 107   m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
 108   AC_SUBST(CFLAGS)
 109   AC_SUBST(CXXFLAGS)
 110
 111   # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
 112   # available).  Uncomment the next line to force a particular method.
 113   AC_PROG_LN_S
 114   #LN_S='cp -p'
 115
 116   AC_CHECK_TOOL(AS, as)
 117   AC_CHECK_TOOL(AR, ar)
 118   AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
 119
 120   AM_MAINTAINER_MODE
 121
 122   # Set up safe default values for all subsequent AM_CONDITIONAL tests
 123   # which are themselves conditionally expanded.
 124   ## (Right now, this only matters for enable_wchar_t, but nothing prevents
 125   ## other macros from doing the same.  This should be automated.)  -pme
 126   need_libmath=no
 127
 128   # Check for uClibc since Linux platforms use different configuration
 129   # directories depending on the C library in use.
 130   AC_EGREP_CPP([_using_uclibc], [
 131   #include <stdio.h>
 132   #if __UCLIBC__
 133     _using_uclibc
 134   #endif
 135   ], uclibc=yes, uclibc=no)
 136
 137   # Find platform-specific directories containing configuration info.
 138   # Also possibly modify flags used elsewhere, as needed by the platform.
 139   GLIBCXX_CHECK_HOST
 140 ])
 141
 142
 143 dnl
 144 dnl Tests for newer compiler features, or features that are present in newer
 145 dnl compiler versions but not older compiler versions still in use, should
 146 dnl be placed here.
 147 dnl
 148 dnl Defines:
 149 dnl  WERROR='-Werror' if requested and possible; g++'s that lack the
 150 dnl   new inlining code or the new system_header pragma will die on -Werror.
 151 dnl   Leave it out by default and use maint-mode to use it.
 152 dnl  SECTION_FLAGS='-ffunction-sections -fdata-sections' if
 153 dnl   compiler supports it and the user has not requested debug mode.
 154 dnl
 155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
 156   # All these tests are for C++; save the language and the compiler flags.
 157   # The CXXFLAGS thing is suspicious, but based on similar bits previously
 158   # found in GLIBCXX_CONFIGURE.
 159   AC_LANG_SAVE
 160   AC_LANG_CPLUSPLUS
 161   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 162   ac_save_CXXFLAGS="$CXXFLAGS"
 163
 164   # Check for maintainer-mode bits.
 165   if test x"$USE_MAINTAINER_MODE" = xno; then
 166     WERROR=''
 167   else
 168     WERROR='-Werror'
 169   fi
 170
 171   # Check for -ffunction-sections -fdata-sections
 172   AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
 173   CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
 174   AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
 175   if test "$ac_test_CXXFLAGS" = set; then
 176     CXXFLAGS="$ac_save_CXXFLAGS"
 177   else
 178     # this is the suspicious part
 179     CXXFLAGS=''
 180   fi
 181   if test x"$ac_fdsections" = x"yes"; then
 182     SECTION_FLAGS='-ffunction-sections -fdata-sections'
 183   fi
 184   AC_MSG_RESULT($ac_fdsections)
 185
 186   AC_LANG_RESTORE
 187   AC_SUBST(WERROR)
 188   AC_SUBST(SECTION_FLAGS)
 189 ])
 190
 191
 192 dnl
 193 dnl If GNU ld is in use, check to see if tricky linker opts can be used.  If
 194 dnl the native linker is in use, all variables will be defined to something
 195 dnl safe (like an empty string).
 196 dnl
 197 dnl Defines:
 198 dnl  SECTION_LDFLAGS='-Wl,--gc-sections' if possible
 199 dnl  OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
 200 dnl  LD (as a side effect of testing)
 201 dnl Sets:
 202 dnl  with_gnu_ld
 203 dnl  glibcxx_gnu_ld_version (possibly)
 204 dnl
 205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
 206 dnl set glibcxx_gnu_ld_version to 12345.  Zeros cause problems.
 207 dnl
 208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
 209   # If we're not using GNU ld, then there's no point in even trying these
 210   # tests.  Check for that first.  We should have already tested for gld
 211   # by now (in libtool), but require it now just to be safe...
 212   test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
 213   test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
 214   AC_REQUIRE([AC_PROG_LD])
 215   AC_REQUIRE([AC_PROG_AWK])
 216
 217   # The name set by libtool depends on the version of libtool.  Shame on us
 218   # for depending on an impl detail, but c'est la vie.  Older versions used
 219   # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
 220   # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
 221   # makes sense).  We'll test with_gnu_ld everywhere else, so if that isn't
 222   # set (hence we're using an older libtool), then set it.
 223   if test x${with_gnu_ld+set} != xset; then
 224     if test x${ac_cv_prog_gnu_ld+set} != xset; then
 225       # We got through "ac_require(ac_prog_ld)" and still not set?  Huh?
 226       with_gnu_ld=no
 227     else
 228       with_gnu_ld=$ac_cv_prog_gnu_ld
 229     fi
 230   fi
 231
 232   # Start by getting the version number.  I think the libtool test already
 233   # does some of this, but throws away the result.
 234   if test x"$with_gnu_ld" = x"yes"; then
 235     AC_MSG_CHECKING([for ld version])
 236     changequote(,)
 237     ldver=`$LD --version 2>/dev/null | head -1 | \
 238            sed -e 's/GNU ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\3/'`
 239     changequote([,])
 240     glibcxx_gnu_ld_version=`echo $ldver | \
 241            $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
 242     AC_MSG_RESULT($glibcxx_gnu_ld_version)
 243   fi
 244
 245   # Set --gc-sections.
 246   glibcxx_gcsections_min_ld=21602
 247   if test x"$with_gnu_ld" = x"yes" &&
 248         test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
 249
 250     # Sufficiently young GNU ld it is!  Joy and bunny rabbits!
 251     # NB: This flag only works reliably after 2.16.1. Configure tests
 252     # for this are difficult, so hard wire a value that should work.
 253
 254     ac_test_CFLAGS="${CFLAGS+set}"
 255     ac_save_CFLAGS="$CFLAGS"
 256     CFLAGS='-Wl,--gc-sections'
 257
 258     # Check for -Wl,--gc-sections
 259     AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
 260     AC_TRY_LINK([ int one(void) { return 1; }
 261      int two(void) { return 2; }
 262         ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
 263     if test "$ac_gcsections" = "yes"; then
 264       rm -f conftest.c
 265       touch conftest.c
 266       if $CC -c conftest.c; then
 267         if $LD --gc-sections -o conftest conftest.o 2>&1 | \
 268            grep "Warning: gc-sections option ignored" > /dev/null; then
 269           ac_gcsections=no
 270         fi
 271       fi
 272       rm -f conftest.c conftest.o conftest
 273     fi
 274     if test "$ac_gcsections" = "yes"; then
 275       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
 276     fi
 277     AC_MSG_RESULT($ac_gcsections)
 278
 279     if test "$ac_test_CFLAGS" = set; then
 280       CFLAGS="$ac_save_CFLAGS"
 281     else
 282       # this is the suspicious part
 283       CFLAGS=''
 284     fi
 285   fi
 286
 287   # Set -z,relro.
 288   # Note this is only for shared objects.
 289   ac_ld_relro=no
 290   if test x"$with_gnu_ld" = x"yes"; then
 291     AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
 292     cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
 293     if test -n "$cxx_z_relo"; then
 294       OPT_LDFLAGS="-Wl,-z,relro"
 295       ac_ld_relro=yes
 296     fi
 297     AC_MSG_RESULT($ac_ld_relro)
 298   fi
 299
 300   # Set linker optimization flags.
 301   if test x"$with_gnu_ld" = x"yes"; then
 302     OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
 303   fi
 304
 305   AC_SUBST(SECTION_LDFLAGS)
 306   AC_SUBST(OPT_LDFLAGS)
 307 ])
 308
 309
 310 dnl
 311 dnl Check for headers for, and arguments to, the setrlimit() function.
 312 dnl Used only in testsuite_hooks.h.  Called from GLIBCXX_CONFIGURE_TESTSUITE.
 313 dnl
 314 dnl Defines:
 315 dnl  _GLIBCXX_RES_LIMITS if we can set artificial resource limits
 316 dnl  various HAVE_LIMIT_* for individual limit names
 317 dnl
 318 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
 319   AC_MSG_CHECKING([for RLIMIT_$1])
 320   AC_TRY_COMPILE(
 321     [#include <unistd.h>
 322      #include <sys/time.h>
 323      #include <sys/resource.h>
 324     ],
 325     [ int f = RLIMIT_$1 ; ],
 326     [glibcxx_mresult=1], [glibcxx_mresult=0])
 327   AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
 328                      [Only used in build directory testsuite_hooks.h.])
 329   if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
 330   AC_MSG_RESULT($res)
 331 ])
 332
 333 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
 334   setrlimit_have_headers=yes
 335   AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
 336                    [],
 337                    [setrlimit_have_headers=no])
 338   # If don't have the headers, then we can't run the tests now, and we
 339   # won't be seeing any of these during testsuite compilation.
 340   if test $setrlimit_have_headers = yes; then
 341     # Can't do these in a loop, else the resulting syntax is wrong.
 342     GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
 343     GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
 344     GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
 345     GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
 346     GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
 347
 348     # Check for rlimit, setrlimit.
 349     AC_CACHE_VAL(ac_setrlimit, [
 350       AC_TRY_COMPILE(
 351         [#include <unistd.h>
 352          #include <sys/time.h>
 353          #include <sys/resource.h>
 354         ],
 355         [struct rlimit r;
 356          setrlimit(0, &r);],
 357         [ac_setrlimit=yes], [ac_setrlimit=no])
 358     ])
 359   fi
 360
 361   AC_MSG_CHECKING([for testsuite resource limits support])
 362   if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
 363     ac_res_limits=yes
 364     AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
 365               [Define if using setrlimit to set resource limits during
 366               "make check"])
 367   else
 368     ac_res_limits=no
 369   fi
 370   AC_MSG_RESULT($ac_res_limits)
 371 ])
 372
 373
 374 dnl
 375 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
 376 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
 377 dnl
 378 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
 379   AC_MSG_CHECKING([for S_ISREG or S_IFREG])
 380   AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
 381     AC_TRY_LINK(
 382       [#include <sys/stat.h>],
 383       [struct stat buffer;
 384        fstat(0, &buffer);
 385        S_ISREG(buffer.st_mode);],
 386       [glibcxx_cv_S_ISREG=yes],
 387       [glibcxx_cv_S_ISREG=no])
 388   ])
 389   AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
 390     AC_TRY_LINK(
 391       [#include <sys/stat.h>],
 392       [struct stat buffer;
 393        fstat(0, &buffer);
 394        S_IFREG & buffer.st_mode;],
 395       [glibcxx_cv_S_IFREG=yes],
 396       [glibcxx_cv_S_IFREG=no])
 397   ])
 398   res=no
 399   if test $glibcxx_cv_S_ISREG = yes; then
 400     AC_DEFINE(HAVE_S_ISREG, 1,
 401               [Define if S_IFREG is available in <sys/stat.h>.])
 402     res=S_ISREG
 403   elif test $glibcxx_cv_S_IFREG = yes; then
 404     AC_DEFINE(HAVE_S_IFREG, 1,
 405               [Define if S_IFREG is available in <sys/stat.h>.])
 406     res=S_IFREG
 407   fi
 408   AC_MSG_RESULT($res)
 409 ])
 410
 411
 412 dnl
 413 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
 414 dnl
 415 AC_DEFUN([GLIBCXX_CHECK_POLL], [
 416   AC_MSG_CHECKING([for poll])
 417   AC_CACHE_VAL(glibcxx_cv_POLL, [
 418     AC_TRY_LINK(
 419       [#include <poll.h>],
 420       [struct pollfd pfd[1];
 421        pfd[0].events = POLLIN;
 422        poll(pfd, 1, 0);],
 423       [glibcxx_cv_POLL=yes],
 424       [glibcxx_cv_POLL=no])
 425   ])
 426   if test $glibcxx_cv_POLL = yes; then
 427     AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
 428   fi
 429   AC_MSG_RESULT($glibcxx_cv_POLL)
 430 ])
 431
 432
 433 dnl
 434 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
 435 dnl
 436 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
 437   AC_MSG_CHECKING([for writev])
 438   AC_CACHE_VAL(glibcxx_cv_WRITEV, [
 439     AC_TRY_LINK(
 440       [#include <sys/uio.h>],
 441       [struct iovec iov[2];
 442        writev(0, iov, 0);],
 443       [glibcxx_cv_WRITEV=yes],
 444       [glibcxx_cv_WRITEV=no])
 445   ])
 446   if test $glibcxx_cv_WRITEV = yes; then
 447     AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
 448   fi
 449   AC_MSG_RESULT($glibcxx_cv_WRITEV)
 450 ])
 451
 452
 453 dnl
 454 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
 455 dnl
 456 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
 457   AC_MSG_CHECKING([for int64_t])
 458   AC_CACHE_VAL(glibcxx_cv_INT64_T, [
 459     AC_TRY_COMPILE(
 460       [#include <stdint.h>],
 461       [int64_t var;],
 462       [glibcxx_cv_INT64_T=yes],
 463       [glibcxx_cv_INT64_T=no])
 464   ])
 465   if test $glibcxx_cv_INT64_T = yes; then
 466     AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
 467   fi
 468   AC_MSG_RESULT($glibcxx_cv_INT64_T)
 469 ])
 470
 471
 472 dnl
 473 dnl Check whether LFS support is available.
 474 dnl
 475 AC_DEFUN([GLIBCXX_CHECK_LFS], [
 476   AC_LANG_SAVE
 477   AC_LANG_CPLUSPLUS
 478   ac_save_CXXFLAGS="$CXXFLAGS"
 479   CXXFLAGS="$CXXFLAGS -fno-exceptions"
 480   AC_MSG_CHECKING([for LFS support])
 481   AC_CACHE_VAL(glibcxx_cv_LFS, [
 482     AC_TRY_LINK(
 483       [#include <unistd.h>
 484        #include <stdio.h>
 485        #include <sys/stat.h>
 486       ],
 487       [FILE* fp;
 488        fopen64("t", "w");
 489        fseeko64(fp, 0, SEEK_CUR);
 490        ftello64(fp);
 491        lseek64(1, 0, SEEK_CUR);
 492        struct stat64 buf;
 493        fstat64(1, &buf);],
 494       [glibcxx_cv_LFS=yes],
 495       [glibcxx_cv_LFS=no])
 496   ])
 497   if test $glibcxx_cv_LFS = yes; then
 498     AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
 499   fi
 500   AC_MSG_RESULT($glibcxx_cv_LFS)
 501   CXXFLAGS="$ac_save_CXXFLAGS"
 502   AC_LANG_RESTORE
 503 ])
 504
 505
 506 dnl
 507 dnl Check for whether a fully dynamic basic_string implementation should
 508 dnl be turned on, that does not put empty objects in per-process static
 509 dnl memory (mostly useful together with shared memory allocators, see PR
 510 dnl libstdc++/16612 for details).
 511 dnl
 512 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
 513 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
 514 dnl  +  Usage:  GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
 515 dnl       Where DEFAULT is either `yes' or `no'.
 516 dnl
 517 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
 518   GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
 519   if test $enable_fully_dynamic_string = yes; then
 520     AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
 521               [Define if a fully dynamic basic_string is wanted.])
 522   fi
 523 ])
 524
 525
 526 dnl
 527 dnl Does any necessary configuration of the testsuite directory.  Generates
 528 dnl the testsuite_hooks.h header.
 529 dnl
 530 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
 531 dnl
 532 dnl Sets:
 533 dnl  enable_abi_check
 534 dnl  GLIBCXX_TEST_WCHAR_T
 535 dnl  GLIBCXX_TEST_THREAD
 536 dnl Substs:
 537 dnl  baseline_dir
 538 dnl
 539 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
 540   if $GLIBCXX_IS_NATIVE ; then
 541     # Do checks for resource limit functions.
 542     GLIBCXX_CHECK_SETRLIMIT
 543
 544     # Look for setenv, so that extended locale tests can be performed.
 545     GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
 546   fi
 547
 548   if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
 549      test $enable_symvers != no; then
 550     case "$host" in
 551       *-*-cygwin*)
 552         enable_abi_check=no ;;
 553       *)
 554         enable_abi_check=yes ;;
 555     esac
 556   else
 557     # Only build this as native, since automake does not understand
 558     # CXX_FOR_BUILD.
 559     enable_abi_check=no
 560   fi
 561
 562   # Export file names for ABI checking.
 563   baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
 564   AC_SUBST(baseline_dir)
 565 ])
 566
 567
 568 dnl
 569 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
 570 dnl
 571 dnl Substs:
 572 dnl  GLIBCXX_INCLUDES
 573 dnl  TOPLEVEL_INCLUDES
 574 dnl
 575 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
 576   # Used for every C++ compile we perform.
 577   GLIBCXX_INCLUDES="\
 578 -I$glibcxx_builddir/include/$host_alias \
 579 -I$glibcxx_builddir/include \
 580 -I$glibcxx_srcdir/libsupc++"
 581
 582   # For Canadian crosses, pick this up too.
 583   if test $CANADIAN = yes; then
 584     GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
 585   fi
 586
 587   # Stuff in the actual top level.  Currently only used by libsupc++ to
 588   # get unwind* headers from the gcc dir.
 589   #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
 590   TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
 591
 592   # Now, export this to all the little Makefiles....
 593   AC_SUBST(GLIBCXX_INCLUDES)
 594   AC_SUBST(TOPLEVEL_INCLUDES)
 595 ])
 596
 597
 598 dnl
 599 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
 600 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
 601 dnl
 602 dnl Substs:
 603 dnl  OPTIMIZE_CXXFLAGS
 604 dnl  WARN_FLAGS
 605 dnl
 606 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
 607   # Optimization flags that are probably a good idea for thrill-seekers. Just
 608   # uncomment the lines below and make, everything else is ready to go...
 609   # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
 610   # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
 611   AC_SUBST(OPTIMIZE_CXXFLAGS)
 612
 613   WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
 614   AC_SUBST(WARN_FLAGS)
 615 ])
 616
 617
 618 dnl
 619 dnl All installation directory information is determined here.
 620 dnl
 621 dnl Substs:
 622 dnl  gxx_install_dir
 623 dnl  glibcxx_prefixdir
 624 dnl  glibcxx_toolexecdir
 625 dnl  glibcxx_toolexeclibdir
 626 dnl
 627 dnl Assumes cross_compiling bits already done, and with_cross_host in
 628 dnl particular.
 629 dnl
 630 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
 631 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
 632 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
 633   glibcxx_toolexecdir=no
 634   glibcxx_toolexeclibdir=no
 635   glibcxx_prefixdir=$prefix
 636
 637   AC_MSG_CHECKING([for gxx-include-dir])
 638   AC_ARG_WITH([gxx-include-dir],
 639     AC_HELP_STRING([--with-gxx-include-dir=DIR],
 640                    [installation directory for include files]),
 641     [case "$withval" in
 642       yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
 643       no)  gxx_include_dir=no ;;
 644       *)   gxx_include_dir=$withval ;;
 645      esac],
 646     [gxx_include_dir=no])
 647   AC_MSG_RESULT($gxx_include_dir)
 648
 649   AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
 650   AC_ARG_ENABLE([version-specific-runtime-libs],
 651     AC_HELP_STRING([--enable-version-specific-runtime-libs],
 652                    [Specify that runtime libraries should be installed in a compiler-specific directory]),
 653     [case "$enableval" in
 654       yes) version_specific_libs=yes ;;
 655       no)  version_specific_libs=no ;;
 656       *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
 657      esac],
 658     [version_specific_libs=no])
 659   AC_MSG_RESULT($version_specific_libs)
 660
 661   # Default case for install directory for include files.
 662   if test $version_specific_libs = no && test $gxx_include_dir = no; then
 663     gxx_include_dir='include/c++/${gcc_version}'
 664     if test -n "$with_cross_host" &&
 665        test x"$with_cross_host" != x"no"; then
 666       gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
 667     else
 668       gxx_include_dir='${prefix}/'"$gxx_include_dir"
 669     fi
 670   fi
 671
 672   # Version-specific runtime libs processing.
 673   if test $version_specific_libs = yes; then
 674     # Need the gcc compiler version to know where to install libraries
 675     # and header files if --enable-version-specific-runtime-libs option
 676     # is selected.  FIXME: these variables are misnamed, there are
 677     # no executables installed in _toolexecdir or _toolexeclibdir.
 678     if test x"$gxx_include_dir" = x"no"; then
 679       gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
 680     fi
 681     glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
 682     glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
 683   fi
 684
 685   # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
 686   # Install a library built with a cross compiler in tooldir, not libdir.
 687   if test x"$glibcxx_toolexecdir" = x"no"; then
 688     if test -n "$with_cross_host" &&
 689        test x"$with_cross_host" != x"no"; then
 690       glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
 691       glibcxx_toolexeclibdir='${toolexecdir}/lib'
 692     else
 693       glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
 694       glibcxx_toolexeclibdir='${libdir}'
 695     fi
 696     multi_os_directory=`$CXX -print-multi-os-directory`
 697     case $multi_os_directory in
 698       .) ;; # Avoid trailing /.
 699       *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
 700     esac
 701   fi
 702
 703   AC_MSG_CHECKING([for install location])
 704   AC_MSG_RESULT($gxx_include_dir)
 705
 706   AC_SUBST(glibcxx_prefixdir)
 707   AC_SUBST(gxx_include_dir)
 708   AC_SUBST(glibcxx_toolexecdir)
 709   AC_SUBST(glibcxx_toolexeclibdir)
 710 ])
 711
 712
 713 dnl
 714 dnl GLIBCXX_ENABLE
 715 dnl    (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
 716 dnl    (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
 717 dnl    (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
 718 dnl
 719 dnl See docs/html/17_intro/configury.html#enable for documentation.
 720 dnl
 721 m4_define([GLIBCXX_ENABLE],[dnl
 722 m4_define([_g_switch],[--enable-$1])dnl
 723 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
 724  AC_ARG_ENABLE($1,_g_help,
 725   m4_bmatch([$5],
 726    [^permit ],
 727      [[
 728       case "$enableval" in
 729        m4_bpatsubst([$5],[permit ])) ;;
 730        *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
 731           dnl Idea for future:  generate a URL pointing to
 732           dnl "onlinedocs/configopts.html#whatever"
 733       esac
 734      ]],
 735    [^$],
 736      [[
 737       case "$enableval" in
 738        yes|no) ;;
 739        *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
 740       esac
 741      ]],
 742    [[$5]]),
 743   [enable_]m4_bpatsubst([$1],-,_)[=][$2])
 744 m4_undefine([_g_switch])dnl
 745 m4_undefine([_g_help])dnl
 746 ])
 747
 748
 749 dnl
 750 dnl Check for ISO/IEC 9899:1999 "C99" support.
 751 dnl
 752 dnl --enable-c99 defines _GLIBCXX_USE_C99
 753 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
 754 dnl  +  Usage:  GLIBCXX_ENABLE_C99[(DEFAULT)]
 755 dnl       Where DEFAULT is either `yes' or `no'.
 756 dnl  +  If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
 757 dnl
 758 AC_DEFUN([GLIBCXX_ENABLE_C99], [
 759   GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
 760
 761   if test x"$enable_c99" = x"yes"; then
 762
 763   AC_LANG_SAVE
 764   AC_LANG_CPLUSPLUS
 765
 766   # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
 767   # undefined and fake C99 facilities - like pre-standard snprintf - may be
 768   # spuriously enabled.
 769   # Long term, -std=c++0x could be even better, could manage to explicitely
 770   # request C99 facilities to the underlying C headers.
 771   ac_save_CXXFLAGS="$CXXFLAGS"
 772   CXXFLAGS="$CXXFLAGS -std=c++98"
 773   ac_save_LIBS="$LIBS"
 774   ac_save_gcc_no_link="$gcc_no_link"
 775
 776   if test x$gcc_no_link != xyes; then
 777     # Use -fno-exceptions to that the C driver can link these tests without
 778     # hitting undefined references to personality routines.
 779     CXXFLAGS="$CXXFLAGS -fno-exceptions"
 780     AC_CHECK_LIB(m, sin, [
 781       LIBS="$LIBS -lm"
 782     ], [
 783       # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
 784       gcc_no_link=yes
 785     ])
 786   fi
 787
 788   # Check for the existence of <math.h> functions used if C99 is enabled.
 789   AC_MSG_CHECKING([for ISO C99 support in <math.h>])
 790   AC_CACHE_VAL(ac_c99_math, [
 791   GCC_TRY_COMPILE_OR_LINK(
 792      [#include <math.h>
 793       volatile double d1, d2;
 794       volatile int i;],
 795      [i = fpclassify(d1);
 796       i = isfinite(d1);
 797       i = isinf(d1);
 798       i = isnan(d1);
 799       i = isnormal(d1);
 800       i = signbit(d1);
 801       i = isgreater(d1, d2);
 802       i = isgreaterequal(d1, d2);
 803       i = isless(d1, d2);
 804       i = islessequal(d1, d2);
 805       i = islessgreater(d1, d2);
 806       i = islessgreater(d1, d2);
 807       i = isunordered(d1, d2);
 808      ],[ac_c99_math=yes], [ac_c99_math=no])
 809   ])
 810   AC_MSG_RESULT($ac_c99_math)
 811   if test x"$ac_c99_math" = x"yes"; then
 812     AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
 813               [Define if C99 functions or macros in <math.h> should be imported
 814               in <cmath> in namespace std.])
 815   fi
 816
 817   # Check for the existence of <complex.h> complex math functions.
 818   # This is necessary even though libstdc++ uses the builtin versions
 819   # of these functions, because if the builtin cannot be used, a reference
 820   # to the library function is emitted.
 821   AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
 822   AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
 823   ac_c99_complex=no;
 824   if test x"$ac_has_complex_h" = x"yes"; then
 825     AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
 826     GCC_TRY_COMPILE_OR_LINK(
 827        [#include <complex.h>
 828         typedef __complex__ float float_type;
 829         typedef __complex__ double double_type;
 830         typedef __complex__ long double ld_type;
 831         volatile float_type tmpf;
 832         volatile double_type tmpd;
 833         volatile ld_type tmpld;
 834         volatile float f;
 835         volatile double d;
 836         volatile long double ld;],
 837        [f = cabsf(tmpf);
 838         f = cargf(tmpf);
 839         tmpf = ccosf(tmpf);
 840         tmpf = ccoshf(tmpf);
 841         tmpf = cexpf(tmpf);
 842         tmpf = clogf(tmpf);
 843         tmpf = csinf(tmpf);
 844         tmpf = csinhf(tmpf);
 845         tmpf = csqrtf(tmpf);
 846         tmpf = ctanf(tmpf);
 847         tmpf = ctanhf(tmpf);
 848         tmpf = cpowf(tmpf, tmpf);
 849         d = cabs(tmpd);
 850         d = carg(tmpd);
 851         tmpd = ccos(tmpd);
 852         tmpd = ccosh(tmpd);
 853         tmpd = cexp(tmpd);
 854         tmpd = clog(tmpd);
 855         tmpd = csin(tmpd);
 856         tmpd = csinh(tmpd);
 857         tmpd = csqrt(tmpd);
 858         tmpd = ctan(tmpd);
 859         tmpd = ctanh(tmpd);
 860         tmpd = cpow(tmpd, tmpd);
 861         ld = cabsl(tmpld);
 862         ld = cargl(tmpld);
 863         tmpld = ccosl(tmpld);
 864         tmpld = ccoshl(tmpld);
 865         tmpld = cexpl(tmpld);
 866         tmpld = clogl(tmpld);
 867         tmpld = csinl(tmpld);
 868         tmpld = csinhl(tmpld);
 869         tmpld = csqrtl(tmpld);
 870         tmpld = ctanl(tmpld);
 871         tmpld = ctanhl(tmpld);
 872         tmpld = cpowl(tmpld, tmpld);
 873        ],[ac_c99_complex=yes], [ac_c99_complex=no])
 874   fi
 875   AC_MSG_RESULT($ac_c99_complex)
 876   if test x"$ac_c99_complex" = x"yes"; then
 877     AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
 878               [Define if C99 functions in <complex.h> should be used in
 879               <complex>. Using compiler builtins for these functions requires
 880               corresponding C99 library functions to be present.])
 881   fi
 882
 883   # Check for the existence in <stdio.h> of vscanf, et. al.
 884   AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
 885   AC_CACHE_VAL(ac_c99_stdio, [
 886   GCC_TRY_COMPILE_OR_LINK(
 887      [#include <stdio.h>
 888       #include <stdarg.h>
 889       void foo(char* fmt, ...)
 890       {
 891         va_list args; va_start(args, fmt);
 892         vfscanf(stderr, "%i", args);
 893         vscanf("%i", args);
 894         vsnprintf(fmt, 0, "%i", args);
 895         vsscanf(fmt, "%i", args);
 896       }],
 897      [snprintf("12", 0, "%i");],
 898      [ac_c99_stdio=yes], [ac_c99_stdio=no])
 899   ])
 900   AC_MSG_RESULT($ac_c99_stdio)
 901
 902   # Check for the existence in <stdlib.h> of lldiv_t, et. al.
 903   AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
 904   AC_CACHE_VAL(ac_c99_stdlib, [
 905   GCC_TRY_COMPILE_OR_LINK(
 906      [#include <stdlib.h>
 907       volatile float f;
 908       volatile long double ld;
 909       volatile unsigned long long ll;
 910       lldiv_t mydivt;],
 911      [char* tmp;
 912       f = strtof("gnu", &tmp);
 913       ld = strtold("gnu", &tmp);
 914       ll = strtoll("gnu", &tmp, 10);
 915       ll = strtoull("gnu", &tmp, 10);
 916       ll = llabs(10);
 917       mydivt = lldiv(10,1);
 918       ll = mydivt.quot;
 919       ll = mydivt.rem;
 920       ll = atoll("10");
 921       _Exit(0);
 922       ],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
 923   ])
 924   AC_MSG_RESULT($ac_c99_stdlib)
 925
 926   # Check for the existence in <wchar.h> of wcstold, etc.
 927   ac_c99_wchar=no;
 928   if test x"$ac_has_wchar_h" = xyes &&
 929      test x"$ac_has_wctype_h" = xyes; then
 930     AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
 931     AC_TRY_COMPILE([#include <wchar.h>
 932                     namespace test
 933                     {
 934                       using ::wcstold;
 935                       using ::wcstoll;
 936                       using ::wcstoull;
 937                     }
 938                    ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
 939
 940     # Checks for wide character functions that may not be present.
 941     # Injection of these is wrapped with guard macros.
 942     # NB: only put functions here, instead of immediately above, if
 943     # absolutely necessary.
 944     AC_TRY_COMPILE([#include <wchar.h>
 945                     namespace test { using ::vfwscanf; } ], [],
 946                    [AC_DEFINE(HAVE_VFWSCANF,1,
 947                         [Defined if vfwscanf exists.])],[])
 948
 949     AC_TRY_COMPILE([#include <wchar.h>
 950                     namespace test { using ::vswscanf; } ], [],
 951                    [AC_DEFINE(HAVE_VSWSCANF,1,
 952                         [Defined if vswscanf exists.])],[])
 953
 954     AC_TRY_COMPILE([#include <wchar.h>
 955                     namespace test { using ::vwscanf; } ], [],
 956                    [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
 957
 958     AC_TRY_COMPILE([#include <wchar.h>
 959                     namespace test { using ::wcstof; } ], [],
 960                    [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
 961
 962     AC_TRY_COMPILE([#include <wctype.h>],
 963                    [ wint_t t; int i = iswblank(t);],
 964                    [AC_DEFINE(HAVE_ISWBLANK,1,
 965                         [Defined if iswblank exists.])],[])
 966
 967     AC_MSG_RESULT($ac_c99_wchar)
 968   fi
 969
 970   # Option parsed, now set things appropriately.
 971   if test x"$ac_c99_math" = x"no" ||
 972      test x"$ac_c99_complex" = x"no" ||
 973      test x"$ac_c99_stdio" = x"no" ||
 974      test x"$ac_c99_stdlib" = x"no" ||
 975      test x"$ac_c99_wchar" = x"no"; then
 976     enable_c99=no;
 977   else
 978     AC_DEFINE(_GLIBCXX_USE_C99, 1,
 979     [Define if C99 functions or macros from <wchar.h>, <math.h>,
 980     <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
 981   fi
 982
 983   gcc_no_link="$ac_save_gcc_no_link"
 984   LIBS="$ac_save_LIBS"
 985   CXXFLAGS="$ac_save_CXXFLAGS"
 986   AC_LANG_RESTORE
 987   fi
 988
 989   AC_MSG_CHECKING([for fully enabled ISO C99 support])
 990   AC_MSG_RESULT($enable_c99)
 991 ])
 992
 993
 994 dnl
 995 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
 996 dnl facilities in Chapter 8, "C compatibility".
 997 dnl
 998 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
 999
1000   AC_LANG_SAVE
1001   AC_LANG_CPLUSPLUS
1002
1003   # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1004   # undefined and fake C99 facilities may be spuriously enabled.
1005   ac_save_CXXFLAGS="$CXXFLAGS"
1006   CXXFLAGS="$CXXFLAGS -std=c++98"
1007
1008   # Check for the existence of <complex.h> complex math functions used
1009   # by tr1/complex.
1010   AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1011   ac_c99_complex_tr1=no;
1012   if test x"$ac_has_complex_h" = x"yes"; then
1013     AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1014     AC_TRY_COMPILE([#include <complex.h>],
1015                    [typedef __complex__ float float_type; float_type tmpf;
1016                     cacosf(tmpf);
1017                     casinf(tmpf);
1018                     catanf(tmpf);
1019                     cacoshf(tmpf);
1020                     casinhf(tmpf);
1021                     catanhf(tmpf);
1022                     typedef __complex__ double double_type; double_type tmpd;
1023                     cacos(tmpd);
1024                     casin(tmpd);
1025                     catan(tmpd);
1026                     cacosh(tmpd);
1027                     casinh(tmpd);
1028                     catanh(tmpd);
1029                     typedef __complex__ long double ld_type; ld_type tmpld;
1030                     cacosl(tmpld);
1031                     casinl(tmpld);
1032                     catanl(tmpld);
1033                     cacoshl(tmpld);
1034                     casinhl(tmpld);
1035                     catanhl(tmpld);
1036                    ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1037   fi
1038   AC_MSG_RESULT($ac_c99_complex_tr1)
1039   if test x"$ac_c99_complex_tr1" = x"yes"; then
1040     AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1041               [Define if C99 functions in <complex.h> should be used in
1042               <tr1/complex>. Using compiler builtins for these functions
1043               requires corresponding C99 library functions to be present.])
1044   fi
1045
1046   # Check for the existence of <ctype.h> functions.
1047   AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1048   AC_CACHE_VAL(ac_c99_ctype_tr1, [
1049   AC_TRY_COMPILE([#include <ctype.h>],
1050                  [int ch;
1051                   int ret;
1052                   ret = isblank(ch);
1053                  ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1054   ])
1055   AC_MSG_RESULT($ac_c99_ctype_tr1)
1056   if test x"$ac_c99_ctype_tr1" = x"yes"; then
1057     AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1058               [Define if C99 functions in <ctype.h> should be imported in
1059               <tr1/cctype> in namespace std::tr1.])
1060   fi
1061
1062   # Check for the existence of <fenv.h> functions.
1063   AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1064   ac_c99_fenv_tr1=no;
1065   if test x"$ac_has_fenv_h" = x"yes"; then
1066     AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1067     AC_TRY_COMPILE([#include <fenv.h>],
1068                    [int except, mode;
1069                     fexcept_t* pflag;
1070                     fenv_t* penv;
1071                     int ret;
1072                     ret = feclearexcept(except);
1073                     ret = fegetexceptflag(pflag, except);
1074                     ret = feraiseexcept(except);
1075                     ret = fesetexceptflag(pflag, except);
1076                     ret = fetestexcept(except);
1077                     ret = fegetround();
1078                     ret = fesetround(mode);
1079                     ret = fegetenv(penv);
1080                     ret = feholdexcept(penv);
1081                     ret = fesetenv(penv);
1082                     ret = feupdateenv(penv);
1083                    ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1084   fi
1085   AC_MSG_RESULT($ac_c99_fenv_tr1)
1086   if test x"$ac_c99_fenv_tr1" = x"yes"; then
1087     AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1088               [Define if C99 functions in <fenv.h> should be imported in
1089               <tr1/cfenv> in namespace std::tr1.])
1090   fi
1091
1092   # Check for the existence of <stdint.h> types.
1093   AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1094   AC_CACHE_VAL(ac_c99_stdint_tr1, [
1095   AC_TRY_COMPILE([#include <stdint.h>],
1096                  [typedef int8_t          my_int8_t;
1097                   typedef int16_t         my_int16_t;
1098                   typedef int32_t         my_int32_t;
1099                   typedef int64_t         my_int64_t;
1100                   typedef int_fast8_t     my_int_fast8_t;
1101                   typedef int_fast16_t    my_int_fast16_t;
1102                   typedef int_fast32_t    my_int_fast32_t;
1103                   typedef int_fast64_t    my_int_fast64_t;
1104                   typedef int_least8_t    my_int_least8_t;
1105                   typedef int_least16_t   my_int_least16_t;
1106                   typedef int_least32_t   my_int_least32_t;
1107                   typedef int_least64_t   my_int_least64_t;
1108                   typedef intmax_t        my_intmax_t;
1109                   typedef intptr_t        my_intptr_t;
1110                   typedef uint8_t         my_uint8_t;
1111                   typedef uint16_t        my_uint16_t;
1112                   typedef uint32_t        my_uint32_t;
1113                   typedef uint64_t        my_uint64_t;
1114                   typedef uint_fast8_t    my_uint_fast8_t;
1115                   typedef uint_fast16_t   my_uint_fast16_t;
1116                   typedef uint_fast32_t   my_uint_fast32_t;
1117                   typedef uint_fast64_t   my_uint_fast64_t;
1118                   typedef uint_least8_t   my_uint_least8_t;
1119                   typedef uint_least16_t  my_uint_least16_t;
1120                   typedef uint_least32_t  my_uint_least32_t;
1121                   typedef uint_least64_t  my_uint_least64_t;
1122                   typedef uintmax_t       my_uintmax_t;
1123                   typedef uintptr_t       my_uintptr_t;
1124                  ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1125   ])
1126   AC_MSG_RESULT($ac_c99_stdint_tr1)
1127   if test x"$ac_c99_stdint_tr1" = x"yes"; then
1128     AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1129               [Define if C99 types in <stdint.h> should be imported in
1130               <tr1/cstdint> in namespace std::tr1.])
1131   fi
1132
1133   # Check for the existence of <math.h> functions.
1134   AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1135   AC_CACHE_VAL(ac_c99_math_tr1, [
1136   AC_TRY_COMPILE([#include <math.h>],
1137                  [typedef double_t  my_double_t;
1138                   typedef float_t   my_float_t;
1139                   acosh(0.0);
1140                   acoshf(0.0f);
1141                   acoshl(0.0l);
1142                   asinh(0.0);
1143                   asinhf(0.0f);
1144                   asinhl(0.0l);
1145                   atanh(0.0);
1146                   atanhf(0.0f);
1147                   atanhl(0.0l);
1148                   cbrt(0.0);
1149                   cbrtf(0.0f);
1150                   cbrtl(0.0l);
1151                   copysign(0.0, 0.0);
1152                   copysignf(0.0f, 0.0f);
1153                   copysignl(0.0l, 0.0l);
1154                   erf(0.0);
1155                   erff(0.0f);
1156                   erfl(0.0l);
1157                   erfc(0.0);
1158                   erfcf(0.0f);
1159                   erfcl(0.0l);
1160                   exp2(0.0);
1161                   exp2f(0.0f);
1162                   exp2l(0.0l);
1163                   expm1(0.0);
1164                   expm1f(0.0f);
1165                   expm1l(0.0l);
1166                   fdim(0.0, 0.0);
1167                   fdimf(0.0f, 0.0f);
1168                   fdiml(0.0l, 0.0l);
1169                   fma(0.0, 0.0, 0.0);
1170                   fmaf(0.0f, 0.0f, 0.0f);
1171                   fmal(0.0l, 0.0l, 0.0l);
1172                   fmax(0.0, 0.0);
1173                   fmaxf(0.0f, 0.0f);
1174                   fmaxl(0.0l, 0.0l);
1175                   fmin(0.0, 0.0);
1176                   fminf(0.0f, 0.0f);
1177                   fminl(0.0l, 0.0l);
1178                   hypot(0.0, 0.0);
1179                   hypotf(0.0f, 0.0f);
1180                   hypotl(0.0l, 0.0l);
1181                   ilogb(0.0);
1182                   ilogbf(0.0f);
1183                   ilogbl(0.0l);
1184                   lgamma(0.0);
1185                   lgammaf(0.0f);
1186                   lgammal(0.0l);
1187                   llrint(0.0);
1188                   llrintf(0.0f);
1189                   llrintl(0.0l);
1190                   llround(0.0);
1191                   llroundf(0.0f);
1192                   llroundl(0.0l);
1193                   log1p(0.0);
1194                   log1pf(0.0f);
1195                   log1pl(0.0l);
1196                   log2(0.0);
1197                   log2f(0.0f);
1198                   log2l(0.0l);
1199                   logb(0.0);
1200                   logbf(0.0f);
1201                   logbl(0.0l);
1202                   lrint(0.0);
1203                   lrintf(0.0f);
1204                   lrintl(0.0l);
1205                   lround(0.0);
1206                   lroundf(0.0f);
1207                   lroundl(0.0l);
1208                   nan(0);
1209                   nanf(0);
1210                   nanl(0);
1211                   nearbyint(0.0);
1212                   nearbyintf(0.0f);
1213                   nearbyintl(0.0l);
1214                   nextafter(0.0, 0.0);
1215                   nextafterf(0.0f, 0.0f);
1216                   nextafterl(0.0l, 0.0l);
1217                   nexttoward(0.0, 0.0);
1218                   nexttowardf(0.0f, 0.0f);
1219                   nexttowardl(0.0l, 0.0l);
1220                   remainder(0.0, 0.0);
1221                   remainderf(0.0f, 0.0f);
1222                   remainderl(0.0l, 0.0l);
1223                   remquo(0.0, 0.0, 0);
1224                   remquo(0.0f, 0.0f, 0);
1225                   remquo(0.0l, 0.0l, 0);
1226                   rint(0.0);
1227                   rintf(0.0f);
1228                   rintl(0.0l);
1229                   round(0.0);
1230                   roundf(0.0f);
1231                   roundl(0.0l);
1232                   scalbln(0.0, 0l);
1233                   scalblnf(0.0f, 0l);
1234                   scalblnl(0.0l, 0l);
1235                   scalbn(0.0, 0);
1236                   scalbnf(0.0f, 0);
1237                   scalbnl(0.0l, 0);
1238                   tgamma(0.0);
1239                   tgammaf(0.0f);
1240                   tgammal(0.0l);
1241                   trunc(0.0);
1242                   truncf(0.0f);
1243                   truncl(0.0l);
1244                  ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1245   ])
1246   AC_MSG_RESULT($ac_c99_math_tr1)
1247   if test x"$ac_c99_math_tr1" = x"yes"; then
1248     AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1249               [Define if C99 functions or macros in <math.h> should be imported
1250               in <tr1/cmath> in namespace std::tr1.])
1251   fi
1252
1253   # Check for the existence of <inttypes.h> functions (NB: doesn't make
1254   # sense if the previous check fails, per C99, 7.8/1).
1255   ac_c99_inttypes_tr1=no;
1256   if test x"$ac_c99_stdint_tr1" = x"yes"; then
1257     AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1258     AC_TRY_COMPILE([#include <inttypes.h>],
1259                    [intmax_t i, numer, denom, base;
1260                     const char* s;
1261                     char** endptr;
1262                     intmax_t ret = imaxabs(i);
1263                     imaxdiv_t dret = imaxdiv(numer, denom);
1264                     ret = strtoimax(s, endptr, base);
1265                     uintmax_t uret = strtoumax(s, endptr, base);
1266                    ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1267   fi
1268   AC_MSG_RESULT($ac_c99_inttypes_tr1)
1269   if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1270     AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1271               [Define if C99 functions in <inttypes.h> should be imported in
1272               <tr1/cinttypes> in namespace std::tr1.])
1273   fi
1274
1275   # Check for the existence of the <stdbool.h> header.
1276   AC_CHECK_HEADERS(stdbool.h)
1277
1278   CXXFLAGS="$ac_save_CXXFLAGS"
1279   AC_LANG_RESTORE
1280 ])
1281
1282 dnl
1283 dnl Check whether "dev/random" and "dev/urandom" are available for the
1284 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1285 dnl
1286 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1287
1288   AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1289   AC_CACHE_VAL(ac_random_tr1, [
1290   AC_TRY_RUN([#include <stdio.h>
1291               int main()
1292               {
1293                 return !(fopen("/dev/random", "r")
1294                          && fopen("/dev/urandom", "r"));
1295               }
1296              ],
1297              [ac_random_tr1=yes], [ac_random_tr1=no],
1298              [ac_random_tr1=no])
1299   ])
1300   AC_MSG_RESULT($ac_random_tr1)
1301   if test x"$ac_random_tr1" = x"yes"; then
1302     AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1303               [Define if dev/random and dev/urandom are available for
1304                the random_device of TR1 (Chapter 5.1).])
1305   fi
1306
1307 ])
1308
1309 dnl
1310 dnl Check whether macros, etc are present for <system_error>
1311 dnl
1312 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1313
1314   AC_MSG_CHECKING([for EOWNERDEAD])
1315   AC_CACHE_VAL(ac_system_error1, [
1316   AC_TRY_COMPILE([#include <errno.h>], [ int i = EOWNERDEAD; ],
1317              [ac_system_error1=yes], [ac_system_error1=no])
1318   ])
1319   AC_MSG_RESULT($ac_system_error1)
1320   if test x"$ac_system_error1" = x"yes"; then
1321     AC_DEFINE(HAVE_EOWNERDEAD, 1, [Define if EOWNERDEAD exists.])
1322   fi
1323
1324   AC_MSG_CHECKING([for ENOTRECOVERABLE])
1325   AC_CACHE_VAL(ac_system_error2, [
1326   AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOTRECOVERABLE; ],
1327              [ac_system_error2=yes], [ac_system_error2=no])
1328   ])
1329   AC_MSG_RESULT($ac_system_error2)
1330   if test x"$ac_system_error2" = x"yes"; then
1331     AC_DEFINE(HAVE_ENOTRECOVERABLE, 1, [Define if ENOTRECOVERABLE exists.])
1332   fi
1333
1334   AC_MSG_CHECKING([for ENOLINK])
1335   AC_CACHE_VAL(ac_system_error3, [
1336   AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOLINK; ],
1337              [ac_system_error3=yes], [ac_system_error3=no])
1338   ])
1339   AC_MSG_RESULT($ac_system_error3)
1340   if test x"$ac_system_error3" = x"yes"; then
1341     AC_DEFINE(HAVE_ENOLINK, 1, [Define if ENOLINK exists.])
1342   fi
1343
1344   AC_MSG_CHECKING([for EPROTO])
1345   AC_CACHE_VAL(ac_system_error_4, [
1346   AC_TRY_COMPILE([#include <errno.h>], [ int i = EPROTO; ],
1347              [ac_system_error_4=yes], [ac_system_error_4=no])
1348   ])
1349   AC_MSG_RESULT($ac_system_error_4)
1350   if test x"$ac_system_error_4" = x"yes"; then
1351     AC_DEFINE(HAVE_EPROTO, 1, [Define if EPROTO exists.])
1352   fi
1353
1354   AC_MSG_CHECKING([for ENODATA])
1355   AC_CACHE_VAL(ac_system_error_5, [
1356   AC_TRY_COMPILE([#include <errno.h>], [ int i = ENODATA; ],
1357              [ac_system_error_5=yes], [ac_system_error_5=no])
1358   ])
1359   AC_MSG_RESULT($ac_system_error_5)
1360   if test x"$ac_system_error_5" = x"yes"; then
1361     AC_DEFINE(HAVE_ENODATA, 1, [Define if ENODATA exists.])
1362   fi
1363
1364   AC_MSG_CHECKING([for ENOSR])
1365   AC_CACHE_VAL(ac_system_error_6, [
1366   AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSR; ],
1367              [ac_system_error_6=yes], [ac_system_error_6=no])
1368   ])
1369   AC_MSG_RESULT($ac_system_error_6)
1370   if test x"$ac_system_error_6" = x"yes"; then
1371     AC_DEFINE(HAVE_ENOSR, 1, [Define if ENOSR exists.])
1372   fi
1373
1374   AC_MSG_CHECKING([for ENOSTR])
1375   AC_CACHE_VAL(ac_system_error_7, [
1376   AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSTR; ],
1377              [ac_system_error_7=yes], [ac_system_error_7=no])
1378   ])
1379   AC_MSG_RESULT($ac_system_error_7)
1380   if test x"$ac_system_error_7" = x"yes"; then
1381     AC_DEFINE(HAVE_ENOSTR, 1, [Define if ENOSTR exists.])
1382   fi
1383
1384   AC_MSG_CHECKING([for ETIME])
1385   AC_CACHE_VAL(ac_system_error_8, [
1386   AC_TRY_COMPILE([#include <errno.h>], [ int i = ETIME; ],
1387              [ac_system_error_8=yes], [ac_system_error_8=no])
1388   ])
1389   AC_MSG_RESULT($ac_system_error_8)
1390   if test x"$ac_system_error_8" = x"yes"; then
1391     AC_DEFINE(HAVE_ETIME, 1, [Define if ETIME exists.])
1392   fi
1393
1394   AC_MSG_CHECKING([for sys_nerr])
1395   AC_CACHE_VAL(ac_system_error9, [
1396   AC_TRY_COMPILE([#include <errno.h> ], [ int i = sys_nerr; ],
1397              [ac_system_error9=yes], [ac_system_error9=no])
1398   ])
1399   AC_MSG_RESULT($ac_system_error9)
1400   if test x"$ac_system_error9" = x"yes"; then
1401     AC_DEFINE(HAVE_SYS_NERR, 1, [Define if sys_nerr exists.])
1402   fi
1403
1404   AC_MSG_CHECKING([for EBADMSG])
1405   AC_CACHE_VAL(ac_system_error_10, [
1406   AC_TRY_COMPILE([#include <errno.h>], [ int i = EBADMSG; ],
1407              [ac_system_error_10=yes], [ac_system_error_10=no])
1408   ])
1409   AC_MSG_RESULT($ac_system_error_10)
1410   if test x"$ac_system_error_10" = x"yes"; then
1411     AC_DEFINE(HAVE_EBADMSG, 1, [Define if EBADMSG exists.])
1412   fi
1413
1414   AC_MSG_CHECKING([for ECANCELED])
1415   AC_CACHE_VAL(ac_system_error_11, [
1416   AC_TRY_COMPILE([#include <errno.h>], [ int i = ECANCELED; ],
1417              [ac_system_error_11=yes], [ac_system_error_11=no])
1418   ])
1419   AC_MSG_RESULT($ac_system_error_11)
1420   if test x"$ac_system_error_11" = x"yes"; then
1421     AC_DEFINE(HAVE_ECANCELED, 1, [Define if ECANCELED exists.])
1422   fi
1423
1424   AC_MSG_CHECKING([for EOVERFLOW])
1425   AC_CACHE_VAL(ac_system_error_12, [
1426   AC_TRY_COMPILE([#include <errno.h>], [ int i = EOVERFLOW; ],
1427              [ac_system_error_12=yes], [ac_system_error_12=no])
1428   ])
1429   AC_MSG_RESULT($ac_system_error_12)
1430   if test x"$ac_system_error_12" = x"yes"; then
1431     AC_DEFINE(HAVE_EOVERFLOW, 1, [Define if EOVERFLOW exists.])
1432   fi
1433 ])
1434
1435 dnl
1436 dnl Check for what type of C headers to use.
1437 dnl
1438 dnl --enable-cheaders= [does stuff].
1439 dnl --disable-cheaders [does not do anything, really].
1440 dnl  +  Usage:  GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1441 dnl       Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1442 dnl
1443 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1444   GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1445     [construct "C" headers for g++], [permit c|c_std|c_global])
1446   AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1447
1448   C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1449
1450   # Allow overrides to configure.host here.
1451   if test $enable_cheaders = c_global; then
1452      c_compatibility=yes
1453   fi
1454
1455   if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1456      c_extra=yes
1457   fi
1458
1459   AC_SUBST(C_INCLUDE_DIR)
1460   GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1461   GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1462   GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1463   GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1464   GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1465 ])
1466
1467
1468 dnl
1469 dnl Check for which locale library to use.  The choice is mapped to
1470 dnl a subdirectory of config/locale.
1471 dnl
1472 dnl Default is generic.
1473 dnl
1474 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1475   GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1476     [use MODEL for target locale package],
1477     [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1478
1479   # Deal with gettext issues.  Default to not using it (=no) until we detect
1480   # support for it later.  Let the user turn it off via --e/d, but let that
1481   # default to on for easier handling.
1482   USE_NLS=no
1483   AC_ARG_ENABLE(nls,
1484     AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1485     [],
1486     [enable_nls=yes])
1487
1488   # Either a known packaage, or "auto"
1489   if test $enable_clocale = no || test $enable_clocale = yes; then
1490      enable_clocale=auto
1491   fi
1492   enable_clocale_flag=$enable_clocale
1493
1494   # Probe for locale model to use if none specified.
1495   # Default to "generic".
1496   if test $enable_clocale_flag = auto; then
1497     case ${target_os} in
1498       linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1499         enable_clocale_flag=gnu
1500         ;;
1501       darwin* | freebsd*)
1502         enable_clocale_flag=darwin
1503         ;;
1504       *)
1505         enable_clocale_flag=generic
1506         ;;
1507     esac
1508   fi
1509
1510   # Sanity check model, and test for special functionality.
1511   if test $enable_clocale_flag = gnu; then
1512     AC_EGREP_CPP([_GLIBCXX_ok], [
1513     #include <features.h>
1514     #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1515       _GLIBCXX_ok
1516     #endif
1517     ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1518
1519     if test $enable_clocale = auto; then
1520       # Test for bugs early in glibc-2.2.x series
1521       AC_TRY_RUN([
1522       #define _GNU_SOURCE 1
1523       #include <locale.h>
1524       #include <string.h>
1525       #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1526       extern __typeof(newlocale) __newlocale;
1527       extern __typeof(duplocale) __duplocale;
1528       extern __typeof(strcoll_l) __strcoll_l;
1529       #endif
1530       int main()
1531       {
1532         const char __one[] = "Äuglein Augmen";
1533         const char __two[] = "Äuglein";
1534         int i;
1535         int j;
1536         __locale_t        loc;
1537         __locale_t        loc_dup;
1538         loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1539         loc_dup = __duplocale(loc);
1540         i = __strcoll_l(__one, __two, loc);
1541         j = __strcoll_l(__one, __two, loc_dup);
1542         return 0;
1543       }
1544       ],
1545       [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1546       [enable_clocale_flag=generic])
1547     fi
1548
1549     # Set it to scream when it hurts.
1550     ac_save_CFLAGS="$CFLAGS"
1551     CFLAGS="-Wimplicit-function-declaration -Werror"
1552
1553     # Use strxfrm_l if available.
1554     AC_TRY_COMPILE([#define _GNU_SOURCE 1
1555                     #include <string.h>
1556                     #include <locale.h>],
1557                     [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1558                     AC_DEFINE(HAVE_STRXFRM_L, 1,
1559                     [Define if strxfrm_l is available in <string.h>.]),)
1560
1561     # Use strerror_l if available.
1562     AC_TRY_COMPILE([#define _GNU_SOURCE 1
1563                     #include <string.h>
1564                     #include <locale.h>],
1565                     [__locale_t loc; strerror_l(5, loc);],
1566                     AC_DEFINE(HAVE_STRERROR_L, 1,
1567                     [Define if strerror_l is available in <string.h>.]),)
1568
1569     CFLAGS="$ac_save_CFLAGS"
1570   fi
1571
1572   # Perhaps use strerror_r if available, and strerror_l isn't.
1573   ac_save_CFLAGS="$CFLAGS"
1574   CFLAGS="-Wimplicit-function-declaration -Werror"
1575   AC_TRY_COMPILE([#define _GNU_SOURCE 1
1576                   #include <string.h>
1577                   #include <locale.h>],
1578                   [char s[128]; strerror_r(5, s, 128);],
1579                   AC_DEFINE(HAVE_STRERROR_R, 1,
1580                   [Define if strerror_r is available in <string.h>.]),)
1581   CFLAGS="$ac_save_CFLAGS"
1582
1583   # Set configure bits for specified locale package
1584   AC_MSG_CHECKING([for C locale to use])
1585   case ${enable_clocale_flag} in
1586     generic)
1587       AC_MSG_RESULT(generic)
1588
1589       CLOCALE_H=config/locale/generic/c_locale.h
1590       CLOCALE_CC=config/locale/generic/c_locale.cc
1591       CCODECVT_CC=config/locale/generic/codecvt_members.cc
1592       CCOLLATE_CC=config/locale/generic/collate_members.cc
1593       CCTYPE_CC=config/locale/generic/ctype_members.cc
1594       CMESSAGES_H=config/locale/generic/messages_members.h
1595       CMESSAGES_CC=config/locale/generic/messages_members.cc
1596       CMONEY_CC=config/locale/generic/monetary_members.cc
1597       CNUMERIC_CC=config/locale/generic/numeric_members.cc
1598       CTIME_H=config/locale/generic/time_members.h
1599       CTIME_CC=config/locale/generic/time_members.cc
1600       CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1601       ;;
1602     darwin)
1603       AC_MSG_RESULT(darwin or freebsd)
1604
1605       CLOCALE_H=config/locale/generic/c_locale.h
1606       CLOCALE_CC=config/locale/generic/c_locale.cc
1607       CCODECVT_CC=config/locale/generic/codecvt_members.cc
1608       CCOLLATE_CC=config/locale/generic/collate_members.cc
1609       CCTYPE_CC=config/locale/darwin/ctype_members.cc
1610       CMESSAGES_H=config/locale/generic/messages_members.h
1611       CMESSAGES_CC=config/locale/generic/messages_members.cc
1612       CMONEY_CC=config/locale/generic/monetary_members.cc
1613       CNUMERIC_CC=config/locale/generic/numeric_members.cc
1614       CTIME_H=config/locale/generic/time_members.h
1615       CTIME_CC=config/locale/generic/time_members.cc
1616       CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1617       ;;
1618
1619     gnu)
1620       AC_MSG_RESULT(gnu)
1621
1622       # Declare intention to use gettext, and add support for specific
1623       # languages.
1624       # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1625       ALL_LINGUAS="de fr"
1626
1627       # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1628       AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1629       if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1630         USE_NLS=yes
1631       fi
1632       # Export the build objects.
1633       for ling in $ALL_LINGUAS; do \
1634         glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1635         glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1636       done
1637       AC_SUBST(glibcxx_MOFILES)
1638       AC_SUBST(glibcxx_POFILES)
1639
1640       CLOCALE_H=config/locale/gnu/c_locale.h
1641       CLOCALE_CC=config/locale/gnu/c_locale.cc
1642       CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1643       CCOLLATE_CC=config/locale/gnu/collate_members.cc
1644       CCTYPE_CC=config/locale/gnu/ctype_members.cc
1645       CMESSAGES_H=config/locale/gnu/messages_members.h
1646       CMESSAGES_CC=config/locale/gnu/messages_members.cc
1647       CMONEY_CC=config/locale/gnu/monetary_members.cc
1648       CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1649       CTIME_H=config/locale/gnu/time_members.h
1650       CTIME_CC=config/locale/gnu/time_members.cc
1651       CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1652       ;;
1653     ieee_1003.1-2001)
1654       AC_MSG_RESULT(IEEE 1003.1)
1655
1656       CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1657       CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1658       CCODECVT_CC=config/locale/generic/codecvt_members.cc
1659       CCOLLATE_CC=config/locale/generic/collate_members.cc
1660       CCTYPE_CC=config/locale/generic/ctype_members.cc
1661       CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1662       CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1663       CMONEY_CC=config/locale/generic/monetary_members.cc
1664       CNUMERIC_CC=config/locale/generic/numeric_members.cc
1665       CTIME_H=config/locale/generic/time_members.h
1666       CTIME_CC=config/locale/generic/time_members.cc
1667       CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1668       ;;
1669   esac
1670
1671   # This is where the testsuite looks for locale catalogs, using the
1672   # -DLOCALEDIR define during testsuite compilation.
1673   glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1674   AC_SUBST(glibcxx_localedir)
1675
1676   # A standalone libintl (e.g., GNU libintl) may be in use.
1677   if test $USE_NLS = yes; then
1678     AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1679     AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1680   fi
1681   if test $USE_NLS = yes; then
1682     AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1683               [Define if NLS translations are to be used.])
1684   fi
1685
1686   AC_SUBST(USE_NLS)
1687   AC_SUBST(CLOCALE_H)
1688   AC_SUBST(CMESSAGES_H)
1689   AC_SUBST(CCODECVT_CC)
1690   AC_SUBST(CCOLLATE_CC)
1691   AC_SUBST(CCTYPE_CC)
1692   AC_SUBST(CMESSAGES_CC)
1693   AC_SUBST(CMONEY_CC)
1694   AC_SUBST(CNUMERIC_CC)
1695   AC_SUBST(CTIME_H)
1696   AC_SUBST(CTIME_CC)
1697   AC_SUBST(CLOCALE_CC)
1698   AC_SUBST(CLOCALE_INTERNAL_H)
1699 ])
1700
1701
1702 dnl
1703 dnl Check for which std::allocator base class to use.  The choice is
1704 dnl mapped from a subdirectory of include/ext.
1705 dnl
1706 dnl Default is new.
1707 dnl
1708 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1709   AC_MSG_CHECKING([for std::allocator base class])
1710   GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1711     [use KIND for target std::allocator base],
1712     [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1713
1714   # If they didn't use this option switch, or if they specified --enable
1715   # with no specific model, we'll have to look for one.  If they
1716   # specified --disable (???), do likewise.
1717   if test $enable_libstdcxx_allocator = no ||
1718      test $enable_libstdcxx_allocator = yes;
1719   then
1720      enable_libstdcxx_allocator=auto
1721   fi
1722
1723   # Either a known package, or "auto". Auto implies the default choice
1724   # for a particular platform.
1725   enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1726
1727   # Probe for host-specific support if no specific model is specified.
1728   # Default to "new".
1729   if test $enable_libstdcxx_allocator_flag = auto; then
1730     case ${target_os} in
1731       linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1732         enable_libstdcxx_allocator_flag=new
1733         ;;
1734       *)
1735         enable_libstdcxx_allocator_flag=new
1736         ;;
1737     esac
1738   fi
1739   AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1740
1741
1742   # Set configure bits for specified locale package
1743   case ${enable_libstdcxx_allocator_flag} in
1744     bitmap)
1745       ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1746       ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1747       ;;
1748     malloc)
1749       ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1750       ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1751       ;;
1752     mt)
1753       ALLOCATOR_H=config/allocator/mt_allocator_base.h
1754       ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1755       ;;
1756     new)
1757       ALLOCATOR_H=config/allocator/new_allocator_base.h
1758       ALLOCATOR_NAME=__gnu_cxx::new_allocator
1759       ;;
1760     pool)
1761       ALLOCATOR_H=config/allocator/pool_allocator_base.h
1762       ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1763       ;;
1764   esac
1765
1766   AC_SUBST(ALLOCATOR_H)
1767   AC_SUBST(ALLOCATOR_NAME)
1768 ])
1769
1770
1771 dnl
1772 dnl Check for whether the Boost-derived checks should be turned on.
1773 dnl
1774 dnl --enable-concept-checks turns them on.
1775 dnl --disable-concept-checks leaves them off.
1776 dnl  +  Usage:  GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1777 dnl       Where DEFAULT is either `yes' or `no'.
1778 dnl
1779 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1780   GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1781   if test $enable_concept_checks = yes; then
1782     AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1783               [Define to use concept checking code from the boost libraries.])
1784   fi
1785 ])
1786
1787 dnl
1788 dnl Check for parallel mode pre-requisites, including OpenMP support.
1789 dnl
1790 dnl  +  Usage:  GLIBCXX_ENABLE_PARALLEL
1791 dnl
1792 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1793
1794   # NB: libstdc++ may be configured before libgomp: can't check for the actual
1795   # dependencies (omp.h and libgomp).
1796   enable_parallel=no;
1797   if test -f $glibcxx_builddir/../libgomp/omp.h; then
1798     enable_parallel=yes;
1799   else
1800     AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1801   fi
1802
1803   # Check to see if it's explicitly disabled.
1804 #  GLIBCXX_ENABLE(libgomp,$1,,[enable code depending on libgomp],
1805 #       [permit yes|no])
1806
1807 #  if test x$enable_libgomp = xno; then
1808 #    enable_parallel=no
1809 #  fi
1810
1811   AC_MSG_CHECKING([for parallel mode support])
1812   AC_MSG_RESULT([$enable_parallel])
1813   GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1814 ])
1815
1816
1817 dnl
1818 dnl Check for which I/O library to use:  stdio, or something specific.
1819 dnl
1820 dnl Default is stdio.
1821 dnl
1822 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1823   AC_MSG_CHECKING([for underlying I/O to use])
1824   GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1825     [use target-specific I/O package], [permit stdio])
1826
1827   # Now that libio has been removed, you can have any color you want as long
1828   # as it's black.  This is one big no-op until other packages are added, but
1829   # showing the framework never hurts.
1830   case ${enable_cstdio} in
1831     stdio)
1832       CSTDIO_H=config/io/c_io_stdio.h
1833       BASIC_FILE_H=config/io/basic_file_stdio.h
1834       BASIC_FILE_CC=config/io/basic_file_stdio.cc
1835       AC_MSG_RESULT(stdio)
1836       ;;
1837   esac
1838
1839   AC_SUBST(CSTDIO_H)
1840   AC_SUBST(BASIC_FILE_H)
1841   AC_SUBST(BASIC_FILE_CC)
1842 ])
1843
1844
1845 dnl
1846 dnl Check for "unusual" flags to pass to the compiler while building.
1847 dnl
1848 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1849 dnl     experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1850 dnl --disable-cxx-flags passes nothing.
1851 dnl  +  See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1852 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1853 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1854 dnl  +  Usage:  GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1855 dnl       If "default flags" is an empty string, the effect is the same
1856 dnl       as --disable or --enable=no.
1857 dnl
1858 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1859   AC_MSG_CHECKING([for extra compiler flags for building])
1860   GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1861     [pass compiler FLAGS when building library],
1862     [case "x$enable_cxx_flags" in
1863       xno | x)   enable_cxx_flags= ;;
1864       x-*)       ;;
1865       *)         AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1866      esac])
1867
1868   # Run through flags (either default or command-line) and set anything
1869   # extra (e.g., #defines) that must accompany particular g++ options.
1870   if test -n "$enable_cxx_flags"; then
1871     for f in $enable_cxx_flags; do
1872       case "$f" in
1873         -fhonor-std)  ;;
1874         -*)  ;;
1875         *)   # and we're trying to pass /what/ exactly?
1876              AC_MSG_ERROR([compiler flags start with a -]) ;;
1877       esac
1878     done
1879   fi
1880
1881   EXTRA_CXX_FLAGS="$enable_cxx_flags"
1882   AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1883   AC_SUBST(EXTRA_CXX_FLAGS)
1884 ])
1885
1886
1887 dnl
1888 dnl Check to see if debugging libraries are to be built.
1889 dnl
1890 dnl --enable-libstdcxx-debug
1891 dnl builds a separate set of debugging libraries in addition to the
1892 dnl normal (shared, static) libstdc++ binaries.
1893 dnl
1894 dnl --disable-libstdcxx-debug
1895 dnl builds only one (non-debug) version of libstdc++.
1896 dnl
1897 dnl --enable-libstdcxx-debug-flags=FLAGS
1898 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1899 dnl
1900 dnl  +  Usage:  GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1901 dnl       Where DEFAULT is either `yes' or `no'.
1902 dnl
1903 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1904   AC_MSG_CHECKING([for additional debug build])
1905   GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1906   AC_MSG_RESULT($enable_libstdcxx_debug)
1907   GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1908 ])
1909
1910
1911 dnl
1912 dnl Check for explicit debug flags.
1913 dnl
1914 dnl --enable-libstdcxx-debug-flags='-O1'
1915 dnl is a general method for passing flags to be used when
1916 dnl building debug libraries with --enable-debug.
1917 dnl
1918 dnl --disable-libstdcxx-debug-flags does nothing.
1919 dnl  +  Usage:  GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1920 dnl       If "default flags" is an empty string, the effect is the same
1921 dnl       as --disable or --enable=no.
1922 dnl
1923 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1924   GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1925     [pass compiler FLAGS when building debug library],
1926     [case "x$enable_libstdcxx_debug_flags" in
1927       xno | x)    enable_libstdcxx_debug_flags= ;;
1928       x-*)        ;;
1929       *)          AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1930      esac])
1931
1932   # Option parsed, now set things appropriately
1933   DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1934   AC_SUBST(DEBUG_FLAGS)
1935
1936   AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1937 ])
1938
1939
1940 dnl
1941 dnl Check if the user only wants a freestanding library implementation.
1942 dnl
1943 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1944 dnl installing only the headers required by [17.4.1.3] and the language
1945 dnl support library.  More than that will be built (to keep the Makefiles
1946 dnl conveniently clean), but not installed.
1947 dnl
1948 dnl Sets:
1949 dnl  is_hosted  (yes/no)
1950 dnl
1951 dnl Defines:
1952 dnl  _GLIBCXX_HOSTED   (always defined, either to 1 or 0)
1953 dnl
1954 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1955   AC_ARG_ENABLE([hosted-libstdcxx],
1956     AC_HELP_STRING([--disable-hosted-libstdcxx],
1957                    [only build freestanding C++ runtime support]),,
1958     [case "$host" in
1959         arm*-*-symbianelf*)
1960             enable_hosted_libstdcxx=no
1961             ;;
1962         *)
1963             enable_hosted_libstdcxx=yes
1964             ;;
1965      esac])
1966   if test "$enable_hosted_libstdcxx" = no; then
1967     AC_MSG_NOTICE([Only freestanding libraries will be built])
1968     is_hosted=no
1969     hosted_define=0
1970     enable_abi_check=no
1971     enable_libstdcxx_pch=no
1972   else
1973     is_hosted=yes
1974     hosted_define=1
1975   fi
1976   GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1977   AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1978     [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1979 ])
1980
1981
1982 dnl
1983 dnl Check for template specializations for the 'long long' type.
1984 dnl The result determines only whether 'long long' I/O is enabled; things
1985 dnl like numeric_limits<> specializations are always available.
1986 dnl
1987 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1988 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1989 dnl  +  Usage:  GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1990 dnl       Where DEFAULT is either `yes' or `no'.
1991 dnl
1992 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1993   GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1994   if test $enable_long_long = yes; then
1995     AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1996               [Define if code specialized for long long should be used.])
1997   fi
1998   AC_MSG_CHECKING([for enabled long long specializations])
1999   AC_MSG_RESULT([$enable_long_long])
2000 ])
2001
2002
2003 dnl
2004 dnl Check for template specializations for the 'wchar_t' type.
2005 dnl
2006 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2007 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2008 dnl  +  Usage:  GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2009 dnl       Where DEFAULT is either `yes' or `no'.
2010 dnl
2011 dnl Necessary support must also be present.
2012 dnl
2013 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2014   GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2015
2016   # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2017   AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2018   AC_MSG_CHECKING([for mbstate_t])
2019   AC_TRY_COMPILE([#include <wchar.h>],
2020   [mbstate_t teststate;],
2021   have_mbstate_t=yes, have_mbstate_t=no)
2022   AC_MSG_RESULT($have_mbstate_t)
2023   if test x"$have_mbstate_t" = xyes; then
2024     AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2025   fi
2026
2027   # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2028   # ac_has_wchar_h.
2029   AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2030
2031   if test x"$enable_wchar_t" = x"yes"; then
2032
2033     AC_LANG_SAVE
2034     AC_LANG_CPLUSPLUS
2035
2036     if test x"$ac_has_wchar_h" = xyes &&
2037        test x"$ac_has_wctype_h" = xyes; then
2038       AC_TRY_COMPILE([#include <wchar.h>
2039                       #include <stddef.h>
2040                       wint_t i;
2041                       long l = WEOF;
2042                       long j = WCHAR_MIN;
2043                       long k = WCHAR_MAX;
2044                       namespace test
2045                       {
2046                         using ::btowc;
2047                         using ::fgetwc;
2048                         using ::fgetws;
2049                         using ::fputwc;
2050                         using ::fputws;
2051                         using ::fwide;
2052                         using ::fwprintf;
2053                         using ::fwscanf;
2054                         using ::getwc;
2055                         using ::getwchar;
2056                         using ::mbrlen;
2057                         using ::mbrtowc;
2058                         using ::mbsinit;
2059                         using ::mbsrtowcs;
2060                         using ::putwc;
2061                         using ::putwchar;
2062                         using ::swprintf;
2063                         using ::swscanf;
2064                         using ::ungetwc;
2065                         using ::vfwprintf;
2066                         using ::vswprintf;
2067                         using ::vwprintf;
2068                         using ::wcrtomb;
2069                         using ::wcscat;
2070                         using ::wcschr;
2071                         using ::wcscmp;
2072                         using ::wcscoll;
2073                         using ::wcscpy;
2074                         using ::wcscspn;
2075                         using ::wcsftime;
2076                         using ::wcslen;
2077                         using ::wcsncat;
2078                         using ::wcsncmp;
2079                         using ::wcsncpy;
2080                         using ::wcspbrk;
2081                         using ::wcsrchr;
2082                         using ::wcsrtombs;
2083                         using ::wcsspn;
2084                         using ::wcsstr;
2085                         using ::wcstod;
2086                         using ::wcstok;
2087                         using ::wcstol;
2088                         using ::wcstoul;
2089                         using ::wcsxfrm;
2090                         using ::wctob;
2091                         using ::wmemchr;
2092                         using ::wmemcmp;
2093                         using ::wmemcpy;
2094                         using ::wmemmove;
2095                         using ::wmemset;
2096                         using ::wprintf;
2097                         using ::wscanf;
2098                       }
2099                      ],[],[], [enable_wchar_t=no])
2100     else
2101       enable_wchar_t=no
2102     fi
2103
2104     AC_LANG_RESTORE
2105   fi
2106
2107   if test x"$enable_wchar_t" = x"yes"; then
2108     AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2109               [Define if code specialized for wchar_t should be used.])
2110   fi
2111
2112   AC_MSG_CHECKING([for enabled wchar_t specializations])
2113   AC_MSG_RESULT([$enable_wchar_t])
2114 ])
2115
2116
2117 dnl
2118 dnl Check to see if building and using a C++ precompiled header can be done.
2119 dnl
2120 dnl --enable-libstdcxx-pch=yes
2121 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2122 dnl may work, after some light-hearted attempts to puzzle out compiler
2123 dnl support, flip bits on in include/Makefile.am
2124 dnl
2125 dnl --disable-libstdcxx-pch
2126 dnl turns off attempts to use or build stdc++.h.gch.
2127 dnl
2128 dnl Substs:
2129 dnl  glibcxx_PCHFLAGS
2130 dnl
2131 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2132   GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2133   if test $enable_libstdcxx_pch = yes; then
2134     AC_CACHE_CHECK([for compiler with PCH support],
2135       [glibcxx_cv_prog_CXX_pch],
2136       [ac_save_CXXFLAGS="$CXXFLAGS"
2137        CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2138        AC_LANG_SAVE
2139        AC_LANG_CPLUSPLUS
2140        echo '#include <math.h>' > conftest.h
2141        if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2142                           -o conftest.h.gch 1>&5 2>&1 &&
2143                 echo '#error "pch failed"' > conftest.h &&
2144           echo '#include "conftest.h"' > conftest.cc &&
2145                $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2146        then
2147          glibcxx_cv_prog_CXX_pch=yes
2148        else
2149          glibcxx_cv_prog_CXX_pch=no
2150        fi
2151        rm -f conftest*
2152        CXXFLAGS=$ac_save_CXXFLAGS
2153        AC_LANG_RESTORE
2154       ])
2155     enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2156   fi
2157
2158   AC_MSG_CHECKING([for enabled PCH])
2159   AC_MSG_RESULT([$enable_libstdcxx_pch])
2160
2161   GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2162   if test $enable_libstdcxx_pch = yes; then
2163     glibcxx_PCHFLAGS="-include bits/stdc++.h"
2164   else
2165     glibcxx_PCHFLAGS=""
2166   fi
2167   AC_SUBST(glibcxx_PCHFLAGS)
2168 ])
2169
2170
2171 dnl
2172 dnl Check for atomic builtins.
2173 dnl See:
2174 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2175 dnl
2176 dnl This checks to see if the host supports the compiler-generated
2177 dnl builtins for atomic operations. Note, this is intended to be an
2178 dnl all-or-nothing switch, so all the atomic operations that are used
2179 dnl should be checked.
2180 dnl
2181 dnl Note:
2182 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2183 dnl see: CHECK_SYNC_FETCH_AND_ADD
2184 dnl
2185 dnl Defines:
2186 dnl  _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2187 dnl
2188 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2189   AC_MSG_CHECKING([for atomic builtins])
2190   AC_LANG_SAVE
2191   AC_LANG_CPLUSPLUS
2192
2193   # Fake what AC_TRY_COMPILE does.  XXX Look at redoing this new-style.
2194     cat > conftest.$ac_ext << EOF
2195 [#]line __oline__ "configure"
2196 int main()
2197 {
2198   // NB: _Atomic_word not necessarily int.
2199   typedef int atomic_type;
2200   atomic_type c1;
2201   atomic_type c2;
2202   const atomic_type c3(0);
2203   if (__sync_fetch_and_add(&c1, c2) == c3)
2204     {
2205       // Do something.
2206     }
2207    return 0;
2208 }
2209 EOF
2210     old_CXXFLAGS="$CXXFLAGS"
2211     CXXFLAGS=-S
2212     if AC_TRY_EVAL(ac_compile); then
2213       if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2214         enable_atomic_builtins=no
2215       else
2216       AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2217         [Define if builtin atomic operations are supported on this host.])
2218         enable_atomic_builtins=yes
2219         atomicity_dir=cpu/generic/atomicity_builtins
2220       fi
2221     fi
2222     CXXFLAGS="$old_CXXFLAGS"
2223     rm -f conftest*
2224
2225    # Now, if still generic, set to mutex.
2226   if test $atomicity_dir = "cpu/generic" ; then
2227         atomicity_dir=cpu/generic/atomicity_mutex
2228   fi
2229  AC_LANG_RESTORE
2230  AC_MSG_RESULT($enable_atomic_builtins)
2231 ])
2232
2233
2234 dnl
2235 dnl Check for exception handling support.  If an explicit enable/disable
2236 dnl sjlj exceptions is given, we don't have to detect.  Otherwise the
2237 dnl target may or may not support call frame exceptions.
2238 dnl
2239 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2240 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2241 dnl Neither one forces an attempt at detection.
2242 dnl
2243 dnl Defines:
2244 dnl  _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2245 dnl
2246 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2247   AC_MSG_CHECKING([for exception model to use])
2248   AC_LANG_SAVE
2249   AC_LANG_CPLUSPLUS
2250   GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2251     [force use of builtin_setjmp for exceptions],
2252     [permit yes|no|auto])
2253
2254   if test $enable_sjlj_exceptions = auto; then
2255     # Botheration.  Now we've got to detect the exception model.  Link tests
2256     # against libgcc.a are problematic since we've not been given proper -L
2257     # bits for single-tree newlib and libgloss.
2258     #
2259     # Fake what AC_TRY_COMPILE does.  XXX Look at redoing this new-style.
2260     cat > conftest.$ac_ext << EOF
2261 [#]line __oline__ "configure"
2262 struct S { ~S(); };
2263 void bar();
2264 void foo()
2265 {
2266   S s;
2267   bar();
2268 }
2269 EOF
2270     old_CXXFLAGS="$CXXFLAGS"
2271     CXXFLAGS=-S
2272     if AC_TRY_EVAL(ac_compile); then
2273       if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2274         enable_sjlj_exceptions=yes
2275       elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2276         enable_sjlj_exceptions=no
2277       elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2278         enable_sjlj_exceptions=no
2279       fi
2280     fi
2281     CXXFLAGS="$old_CXXFLAGS"
2282     rm -f conftest*
2283   fi
2284
2285   # This is a tad weird, for hysterical raisins.  We have to map
2286   # enable/disable to two different models.
2287   case $enable_sjlj_exceptions in
2288     yes)
2289       AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2290         [Define if the compiler is configured for setjmp/longjmp exceptions.])
2291       ac_exception_model_name=sjlj
2292       ;;
2293     no)
2294       ac_exception_model_name="call frame"
2295       ;;
2296     *)
2297       AC_MSG_ERROR([unable to detect exception model])
2298       ;;
2299   esac
2300  AC_LANG_RESTORE
2301  AC_MSG_RESULT($ac_exception_model_name)
2302 ])
2303
2304
2305 dnl
2306 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2307 dnl
2308 dnl --enable-visibility enables attempt to use visibility attributes.
2309 dnl --disable-visibility turns off all use of visibility attributes.
2310 dnl  +  Usage:  GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2311 dnl       Where DEFAULT is 'yes'.
2312 dnl
2313 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2314 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2315
2316 if test x$enable_visibility = xyes ; then
2317   dnl all hail libgfortran
2318   dnl Check whether the target supports hidden visibility.
2319   AC_CACHE_CHECK([whether the target supports hidden visibility],
2320                  have_attribute_visibility, [
2321   save_CFLAGS="$CFLAGS"
2322   CFLAGS="$CFLAGS -Werror"
2323   AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2324                  [], have_attribute_visibility=yes,
2325                  have_attribute_visibility=no)
2326   CFLAGS="$save_CFLAGS"])
2327   if test $have_attribute_visibility = no; then
2328     enable_visibility=no
2329   fi
2330 fi
2331
2332 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2333 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2334 ])
2335
2336
2337 dnl
2338 dnl Add version tags to symbols in shared library (or not), additionally
2339 dnl marking other symbols as private/local (or not).
2340 dnl
2341 dnl --enable-symvers=style adds a version script to the linker call when
2342 dnl       creating the shared library.  The choice of version script is
2343 dnl       controlled by 'style'.
2344 dnl --disable-symvers does not.
2345 dnl  +  Usage:  GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2346 dnl       Where DEFAULT is either 'yes' or 'no'.  Passing `yes' tries to
2347 dnl       choose a default style based on linker characteristics.  Passing
2348 dnl       'no' disables versioning.
2349 dnl
2350 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2351
2352 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2353   [enables symbol versioning of the shared library],
2354   [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2355
2356 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2357 # don't know enough about $LD to do tricks...
2358 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2359
2360 # Turn a 'yes' into a suitable default.
2361 if test x$enable_symvers = xyes ; then
2362   if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2363     enable_symvers=no
2364   else
2365     if test $with_gnu_ld = yes ; then
2366       enable_symvers=gnu
2367     else
2368       case ${target_os} in
2369         darwin*)
2370           enable_symvers=darwin ;;
2371         *)
2372           enable_symvers=no ;;
2373       esac
2374     fi
2375   fi
2376 fi
2377
2378 # Check to see if 'darwin' or 'darwin-export' can win.
2379 if test x$enable_symvers = xdarwin-export ; then
2380     enable_symvers=darwin
2381 fi
2382
2383 # Check to see if 'gnu' can win.
2384 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2385   # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2386   AC_MSG_CHECKING([for shared libgcc])
2387   ac_save_CFLAGS="$CFLAGS"
2388   CFLAGS=' -lgcc_s'
2389   AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2390   CFLAGS="$ac_save_CFLAGS"
2391   if test $glibcxx_shared_libgcc = no; then
2392     cat > conftest.c <<EOF
2393 int main (void) { return 0; }
2394 EOF
2395 changequote(,)dnl
2396     glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2397                              -shared -shared-libgcc -o conftest.so \
2398                              conftest.c -v 2>&1 >/dev/null \
2399                              | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2400 changequote([,])dnl
2401     rm -f conftest.c conftest.so
2402     if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2403       CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2404       AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2405       CFLAGS="$ac_save_CFLAGS"
2406     fi
2407   fi
2408   AC_MSG_RESULT($glibcxx_shared_libgcc)
2409
2410   # For GNU ld, we need at least this version.  The format is described in
2411   # GLIBCXX_CHECK_LINKER_FEATURES above.
2412   glibcxx_min_gnu_ld_version=21400
2413
2414   # If no shared libgcc, can't win.
2415   if test $glibcxx_shared_libgcc != yes; then
2416       AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2417       AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2418       AC_MSG_WARN([=== Symbol versioning will be disabled.])
2419       enable_symvers=no
2420   elif test $with_gnu_ld != yes ; then
2421     # just fail for now
2422     AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2423     AC_MSG_WARN([=== you are not using the GNU linker.])
2424     AC_MSG_WARN([=== Symbol versioning will be disabled.])
2425     enable_symvers=no
2426   elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2427     # The right tools, the right setup, but too old.  Fallbacks?
2428     AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2429     AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2430     AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2431     AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2432     AC_MSG_WARN([=== Symbol versioning will be disabled.])
2433     enable_symvers=no
2434   fi
2435 fi
2436
2437 # Everything parsed; figure out what file to use.
2438 case $enable_symvers in
2439   no)
2440     SYMVER_FILE=config/abi/pre/none.ver
2441     ;;
2442   gnu)
2443     SYMVER_FILE=config/abi/pre/gnu.ver
2444     AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2445               [Define to use GNU versioning in the shared library.])
2446     ;;
2447   gnu-versioned-namespace)
2448     SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2449     AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2450               [Define to use GNU namespace versioning in the shared library.])
2451     ;;
2452   darwin)
2453     SYMVER_FILE=config/abi/pre/gnu.ver
2454     AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2455               [Define to use darwin versioning in the shared library.])
2456     ;;
2457 esac
2458
2459 if test x$enable_symvers != xno ; then
2460   AC_DEFINE(_GLIBCXX_SYMVER, 1,
2461          [Define to use symbol versioning in the shared library.])
2462 fi
2463
2464 AC_SUBST(SYMVER_FILE)
2465 AC_SUBST(port_specific_symbol_files)
2466 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2467 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2468 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2469 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2470 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2471
2472 # Now, set up compatibility support, if any.
2473 # In addition, need this to deal with std::size_t mangling in
2474 # src/compatibility.cc.  In a perfect world, could use
2475 # typeid(std::size_t).name()[0] to do direct substitution.
2476 AC_MSG_CHECKING([for size_t as unsigned int])
2477 ac_save_CFLAGS="$CFLAGS"
2478 CFLAGS="-Werror"
2479 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2480                  [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2481 CFLAGS=$ac_save_CFLAGS
2482 if test "$glibcxx_size_t_is_i" = yes; then
2483   AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2484 fi
2485 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2486
2487 AC_MSG_CHECKING([for ptrdiff_t as int])
2488 ac_save_CFLAGS="$CFLAGS"
2489 CFLAGS="-Werror"
2490 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2491                  [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2492 CFLAGS=$ac_save_CFLAGS
2493 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2494   AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2495 fi
2496 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2497 ])
2498
2499
2500 dnl
2501 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2502 dnl We must stage the required headers so that they will be installed
2503 dnl with the library (unlike libgcc, the STL implementation is provided
2504 dnl solely within headers).  Since we must not inject random user-space
2505 dnl macro names into user-provided C++ code, we first stage into <file>-in
2506 dnl and process to <file> with an output command.  The reason for a two-
2507 dnl stage process here is to correctly handle $srcdir!=$objdir without
2508 dnl having to write complex code (the sed commands to clean the macro
2509 dnl namespace are complex and fragile enough as it is).  We must also
2510 dnl add a relative path so that -I- is supported properly.
2511 dnl
2512 dnl Substs:
2513 dnl  glibcxx_thread_h
2514 dnl
2515 dnl Defines:
2516 dnl  HAVE_GTHR_DEFAULT
2517 dnl
2518 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2519   AC_MSG_CHECKING([for thread model used by GCC])
2520   target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2521   AC_MSG_RESULT([$target_thread_file])
2522
2523   if test $target_thread_file != single; then
2524     AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2525               [Define if gthr-default.h exists
2526               (meaning that threading support is enabled).])
2527   fi
2528
2529   glibcxx_thread_h=gthr-$target_thread_file.h
2530
2531   dnl Check for __GTHREADS define.
2532   gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2533   if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2534     enable_thread=yes
2535   else
2536    enable_thread=no
2537   fi
2538
2539   AC_SUBST(glibcxx_thread_h)
2540 ])
2541
2542
2543 # Check whether LC_MESSAGES is available in <locale.h>.
2544 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2545 #
2546 # This file file be copied and used freely without restrictions.  It can
2547 # be used in projects which are not available under the GNU Public License
2548 # but which still want to provide support for the GNU gettext functionality.
2549 # Please note that the actual code is *not* freely available.
2550 AC_DEFUN([AC_LC_MESSAGES], [
2551   AC_CHECK_HEADER(locale.h, [
2552     AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2553       [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2554        ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2555     if test $ac_cv_val_LC_MESSAGES = yes; then
2556       AC_DEFINE(HAVE_LC_MESSAGES, 1,
2557                 [Define if LC_MESSAGES is available in <locale.h>.])
2558     fi
2559   ])
2560 ])
2561
2562 # Macros from the top-level gcc directory.
2563 m4_include([../config/tls.m4])
2564