libstdc++-v3/acinclude.m4

   1 dnl
   2 dnl Initialize configure bits.
   3 dnl
   4 dnl Define OPTLEVEL='-O2' if new inlining code present.
   5 dnl
   6 dnl GLIBCPP_CONFIGURE
   7 AC_DEFUN(GLIBCPP_CONFIGURE, [
   8   dnl Default to --enable-multilib
   9   AC_ARG_ENABLE(multilib,
  10   [  --enable-multilib       build hella library versions (default)],
  11   [case "${enableval}" in
  12     yes) multilib=yes ;;
  13     no)  multilib=no ;;
  14     *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
  15    esac], [multilib=yes])dnl
  16
  17   dnl We may get other options which we dont document:
  18   dnl --with-target-subdir, --with-multisrctop, --with-multisubdir
  19   if test "[$]{srcdir}" = "."; then
  20     if test "[$]{with_target_subdir}" != "."; then
  21       glibcpp_basedir="[$]{srcdir}/[$]{with_multisrctop}../$1"
  22     else
  23       glibcpp_basedir="[$]{srcdir}/[$]{with_multisrctop}$1"
  24     fi
  25   else
  26     glibcpp_basedir="[$]{srcdir}/$1"
  27   fi
  28   AC_SUBST(glibcpp_basedir)
  29
  30   AM_INIT_AUTOMAKE(libstdc++, 2.90.8)
  31
  32   # Never versions of autoconf add an underscore to these functions.
  33   # Prevent future problems ...
  34   ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
  35   ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
  36   ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
  37   ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
  38
  39 #  AC_PROG_CC
  40
  41 # FIXME: We temporarily define our own version of AC_PROG_CC.  This is
  42 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
  43 # are probably using a cross compiler, which will not be able to fully
  44 # link an executable.  This should really be fixed in autoconf
  45 # itself.
  46
  47 AC_DEFUN(LIB_AC_PROG_CC,
  48 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  49 dnl Fool anybody using AC_PROG_CC.
  50 AC_PROVIDE([AC_PROG_CC])
  51 AC_CHECK_PROG(CC, gcc, gcc)
  52 if test -z "$CC"; then
  53   AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  54   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
  55 fi
  56
  57 AC_PROG_CC_GNU
  58
  59 if test $ac_cv_prog_gcc = yes; then
  60   GCC=yes
  61 dnl Check whether -g works, even if CFLAGS is set, in case the package
  62 dnl plays around with CFLAGS (such as to build both debugging and
  63 dnl normal versions of a library), tasteless as that idea is.
  64   ac_test_CFLAGS="${CFLAGS+set}"
  65   ac_save_CFLAGS="$CFLAGS"
  66   CFLAGS=
  67   AC_PROG_CC_G
  68   if test "$ac_test_CFLAGS" = set; then
  69     CFLAGS="$ac_save_CFLAGS"
  70   elif test $ac_cv_prog_cc_g = yes; then
  71     CFLAGS="-g -O2"
  72   else
  73     CFLAGS="-O2"
  74   fi
  75 else
  76   GCC=
  77   test "${CFLAGS+set}" = set || CFLAGS="-g"
  78 fi
  79 ])
  80
  81 LIB_AC_PROG_CC
  82
  83 # Can't just call these here as g++ requires libstc++ to be built....
  84 #  AC_PROG_CXX
  85
  86 # Likewise for AC_PROG_CXX.
  87 AC_DEFUN(LIB_AC_PROG_CXX,
  88 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
  89 dnl Fool anybody using AC_PROG_CXX.
  90 AC_PROVIDE([AC_PROG_CXX])
  91 # Use CXX_libstdcxx so that we do not cause CXX to be cached with the
  92 # flags that come in CXX while configuring libstdc++.  They're different
  93 # from those used for all other target libraries.  If CXX is set in
  94 # the environment, respect that here.
  95 CXX_libstdcxx=$CXX
  96 AC_CHECK_PROGS(CXX_libstdcxx, $CCC c++ g++ gcc CC cxx cc++, gcc)
  97 CXX=$CXX_libstdcxx
  98 AC_SUBST(CXX)
  99 test -z "$CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
 100
 101 AC_PROG_CXX_GNU
 102
 103 if test $ac_cv_prog_gxx = yes; then
 104   GXX=yes
 105 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
 106 dnl plays around with CXXFLAGS (such as to build both debugging and
 107 dnl normal versions of a library), tasteless as that idea is.
 108   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 109   ac_save_CXXFLAGS="$CXXFLAGS"
 110   CXXFLAGS=
 111   AC_PROG_CXX_G
 112   if test "$ac_test_CXXFLAGS" = set; then
 113     CXXFLAGS="$ac_save_CXXFLAGS"
 114   elif test $ac_cv_prog_cxx_g = yes; then
 115     CXXFLAGS="-g -O2"
 116   else
 117     CXXFLAGS="-O2"
 118   fi
 119 else
 120   GXX=
 121   test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
 122 fi
 123 ])
 124
 125 LIB_AC_PROG_CXX
 126
 127   AC_CHECK_TOOL(AS, as)
 128   AC_CHECK_TOOL(AR, ar)
 129   AC_CHECK_TOOL(RANLIB, ranlib, :)
 130
 131   AC_PROG_INSTALL
 132
 133   AM_MAINTAINER_MODE
 134
 135   # We need AC_EXEEXT to keep automake happy in cygnus mode.  However,
 136   # at least currently, we never actually build a program, so we never
 137   # need to use $(EXEEXT).  Moreover, the test for EXEEXT normally
 138   # fails, because we are probably configuring with a cross compiler
 139   # which cant create executables.  So we include AC_EXEEXT to keep
 140   # automake happy, but we dont execute it, since we dont care about
 141   # the result.
 142   if false; then
 143     AC_EXEEXT
 144   fi
 145
 146   # configure.host sets the following important variables
 147   #        glibcpp_cflags    - host specific C compiler flags
 148   #        glibcpp_cxxflags  - host specific C++ compiler flags
 149   glibcpp_cflags=
 150   glibcpp_cxxflags=
 151
 152   . [$]{glibcpp_basedir}/configure.host
 153
 154   case [$]{glibcpp_basedir} in
 155     /* | [A-Za-z]:[/\\]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
 156     *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
 157   esac
 158
 159   # This does for the target what configure.host does for the host.  In
 160   # addition to modifying the same flags, it also sets up symlinks.
 161   GLIBCPP_CHECK_TARGET
 162
 163   GLIBCPP_CFLAGS="[$]{glibcpp_cflags}"
 164   GLIBCPP_CXXFLAGS="[$]{glibcpp_cxxflags}"
 165   AC_SUBST(GLIBCPP_CFLAGS)
 166   AC_SUBST(GLIBCPP_CXXFLAGS)
 167 ])
 168
 169
 170 dnl
 171 dnl Check to see if g++ can compile this library, and if so, if any version-
 172 dnl specific precautions need to be taken.
 173 dnl
 174 dnl GLIBCPP_CHECK_COMPILER_VERSION
 175 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
 176 if test ! -f stamp-sanity-compiler; then
 177   AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
 178   AC_LANG_SAVE
 179   AC_LANG_CPLUSPLUS
 180   AC_EGREP_CPP(ok, [
 181   #if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
 182     ok
 183   #endif
 184   ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to gcc-2.95 or above]))
 185   AC_LANG_RESTORE
 186   AC_MSG_RESULT($gpp_satisfactory)
 187   touch stamp-sanity-compiler
 188 fi
 189 ])
 190
 191
 192 dnl
 193 dnl Test for newer compiler features, or features that are present in newer
 194 dnl compiler version but not older compiler versions should be placed
 195 dnl here.
 196 dnl
 197 dnl Define WFMT_FLAGS='-fdiagnostics-show-location=once' if possible
 198 dnl
 199 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
 200 dnl new inlining code or the new system_header pragma will die on -Werror.
 201 dnl Leave it out by default and use maint-mode to use it.
 202 dnl
 203 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
 204 dnl compiler supports it.
 205 dnl GLIBCPP_CHECK_COMPILER_FEATURES
 206 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
 207   # All these tests are for C++; save the language and the compiler flags.
 208   # The CXXFLAGS thing is suspicious, but based on similar bits
 209   # found in GLIBCPP_CONFIGURE.
 210   AC_LANG_SAVE
 211   AC_LANG_CPLUSPLUS
 212   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 213   ac_save_CXXFLAGS="$CXXFLAGS"
 214
 215   # Check for maintainer-mode bits.
 216   if test x"$USE_MAINTAINER_MODE" = xno; then
 217     WERROR=''
 218   else
 219     WERROR='-Werror'
 220   fi
 221
 222   # Check for more sophisticated diagnostic control.
 223   AC_MSG_CHECKING([for g++ that supports -fdiagnostics-show-location=once])
 224   CXXFLAGS='-Werror -fdiagnostics-show-location=once'
 225   AC_TRY_COMPILE(, [int foo;
 226   ], [ac_gabydiags=yes], [ac_gabydiags=no])
 227   if test "$ac_test_CXXFLAGS" = set; then
 228     CXXFLAGS="$ac_save_CXXFLAGS"
 229   else
 230     # this is the suspicious part
 231     CXXFLAGS=''
 232   fi
 233   if test "$ac_gabydiags" = "yes"; then
 234     WFMT_FLAGS='-fdiagnostics-show-location=once'
 235   fi
 236   AC_MSG_RESULT($ac_gabydiags)
 237
 238   # Check for -ffunction-sections -fdata-sections
 239   AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
 240   CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
 241   AC_TRY_COMPILE(, [int foo;
 242   ], [ac_fdsections=yes], [ac_fdsections=no])
 243   if test "$ac_test_CXXFLAGS" = set; then
 244     CXXFLAGS="$ac_save_CXXFLAGS"
 245   else
 246     # this is the suspicious part
 247     CXXFLAGS=''
 248   fi
 249   if test "$ac_fdsections" = "yes"; then
 250     SECTION_FLAGS='-ffunction-sections -fdata-sections'
 251   fi
 252   AC_MSG_RESULT($ac_fdsections)
 253
 254   AC_LANG_RESTORE
 255   AC_SUBST(WERROR)
 256   AC_SUBST(WFMT_FLAGS)
 257   AC_SUBST(SECTION_FLAGS)
 258 ])
 259
 260
 261 dnl
 262 dnl If GNU ld is in use, check to see if tricky linker opts can be used.  If
 263 dnl the native linker is in use, all variables will be defined to something
 264 dnl safe (like an empty string).
 265 dnl
 266 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
 267 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
 268 dnl
 269 dnl GLIBCPP_CHECK_LINKER_FEATURES
 270 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
 271   # If we're not using GNU ld, then there's no point in even trying these
 272   # tests.  Check for that first.  We should have already tested for gld
 273   # by now (in libtool), but require it now just to be safe...
 274   SECTION_LDFLAGS=''
 275   OPT_LDFLAGS=''
 276   AC_REQUIRE([AC_PROG_LD])
 277
 278   # Set --gc-sections.
 279   if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
 280     # GNU ld it is!  Joy and bunny rabbits!
 281
 282     # All these tests are for C++; save the language and the compiler flags.
 283     # Need to do this so that g++ won't try to link in libstdc++
 284     ac_test_CFLAGS="${CFLAGS+set}"
 285     ac_save_CFLAGS="$CFLAGS"
 286     CFLAGS='-x c++  -Wl,--gc-sections'
 287
 288     # Check for -Wl,--gc-sections
 289     # XXX This test is broken at the moment, as symbols required for
 290     # linking are now in libsupc++ (not built yet.....). In addition,
 291     # this test has cored on solaris in the past. In addition,
 292     # --gc-sections doesn't really work at the moment (keeps on discarding
 293     # used sections, first .eh_frame and now some of the glibc sections for
 294     # iconv). Bzzzzt. Thanks for playing, maybe next time.
 295     AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
 296     AC_TRY_RUN([
 297      int main(void)
 298      {
 299        try { throw 1; }
 300        catch (...) { };
 301        return 0;
 302      }
 303     ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
 304     if test "$ac_test_CFLAGS" = set; then
 305       CFLAGS="$ac_save_CFLAGS"
 306     else
 307       # this is the suspicious part
 308       CFLAGS=''
 309     fi
 310     if test "$ac_sectionLDflags" = "yes"; then
 311       SECTION_LDFLAGS='-Wl,--gc-sections'
 312     fi
 313     AC_MSG_RESULT($ac_sectionLDflags)
 314   fi
 315
 316   # Set linker optimization flags.
 317   if test "$ac_cv_prog_gnu_ld" = "yes"; then
 318     OPT_LDFLAGS='-Wl,-O1'
 319   fi
 320
 321   AC_SUBST(SECTION_LDFLAGS)
 322   AC_SUBST(OPT_LDFLAGS)
 323 ])
 324
 325
 326 dnl
 327 dnl Check to see if the (math function) argument passed is
 328 dnl 1) declared when using the c++ compiler
 329 dnl 2) has "C" linkage
 330 dnl
 331 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 332 dnl
 333 dnl argument 1 is name of function to check
 334 dnl
 335 dnl ASSUMES argument is a math function with ONE parameter
 336 dnl
 337 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
 338 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
 339   AC_MSG_CHECKING([for $1 declaration])
 340   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 341     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 342       AC_LANG_SAVE
 343       AC_LANG_CPLUSPLUS
 344       AC_TRY_COMPILE([#include <math.h>],
 345                      [ $1(0);],
 346                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 347       AC_LANG_RESTORE
 348     ])
 349   fi
 350   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 351   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 352     AC_CHECK_FUNCS($1)
 353   fi
 354 ])
 355
 356
 357 dnl
 358 dnl Check to see if the (math function) argument passed is
 359 dnl 1) declared when using the c++ compiler
 360 dnl 2) has "C" linkage
 361 dnl
 362 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 363 dnl
 364 dnl argument 1 is name of function to check
 365 dnl
 366 dnl ASSUMES argument is a math function with TWO parameters
 367 dnl
 368 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
 369 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
 370   AC_MSG_CHECKING([for $1 declaration])
 371   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 372     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 373       AC_LANG_SAVE
 374       AC_LANG_CPLUSPLUS
 375       AC_TRY_COMPILE([#include <math.h>],
 376                      [ $1(0, 0);],
 377                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 378       AC_LANG_RESTORE
 379     ])
 380   fi
 381   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 382   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 383     AC_CHECK_FUNCS($1)
 384   fi
 385 ])
 386
 387
 388 dnl
 389 dnl Check to see if the (math function) argument passed is
 390 dnl 1) declared when using the c++ compiler
 391 dnl 2) has "C" linkage
 392 dnl
 393 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 394 dnl
 395 dnl argument 1 is name of function to check
 396 dnl
 397 dnl ASSUMES argument is a math function with THREE parameters
 398 dnl
 399 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
 400 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
 401   AC_MSG_CHECKING([for $1 declaration])
 402   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 403     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 404       AC_LANG_SAVE
 405       AC_LANG_CPLUSPLUS
 406       AC_TRY_COMPILE([#include <math.h>],
 407                      [ $1(0, 0, 0);],
 408                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 409       AC_LANG_RESTORE
 410     ])
 411   fi
 412   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 413   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 414     AC_CHECK_FUNCS($1)
 415   fi
 416 ])
 417
 418
 419 dnl
 420 dnl Check to see if the (stdlib function) argument passed is
 421 dnl 1) declared when using the c++ compiler
 422 dnl 2) has "C" linkage
 423 dnl
 424 dnl Define HAVE_STRTOLD if "strtold" is declared and links
 425 dnl Define HAVE_STRTOF if "strtof" is declared and links
 426 dnl
 427 dnl argument 1 is name of function to check
 428 dnl
 429 dnl ASSUMES argument is a math function with TWO parameters
 430 dnl
 431 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
 432 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
 433   AC_MSG_CHECKING([for $1 declaration])
 434   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 435     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 436       AC_LANG_SAVE
 437       AC_LANG_CPLUSPLUS
 438       AC_TRY_COMPILE([#include <stdlib.h>],
 439                      [ $1(0, 0);],
 440                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 441       AC_LANG_RESTORE
 442     ])
 443   fi
 444   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 445   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 446     AC_CHECK_FUNCS($1)
 447   fi
 448 ])
 449
 450
 451 dnl
 452 dnl Because the builtins are picky picky picky about the arguments they take,
 453 dnl do an explict linkage tests here.
 454 dnl Check to see if the (math function) argument passed is
 455 dnl 1) declared when using the c++ compiler
 456 dnl 2) has "C" linkage
 457 dnl
 458 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 459 dnl
 460 dnl argument 1 is name of function to check
 461 dnl
 462 dnl ASSUMES argument is a math function with ONE parameter
 463 dnl
 464 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
 465 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
 466   AC_MSG_CHECKING([for $1 declaration])
 467   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 468     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 469       AC_LANG_SAVE
 470       AC_LANG_CPLUSPLUS
 471       AC_TRY_COMPILE([#include <math.h>],
 472                      [ $1(0);],
 473                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 474       AC_LANG_RESTORE
 475     ])
 476   fi
 477   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 478   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 479     AC_MSG_CHECKING([for $1 linkage])
 480     if test x${glibcpp_cv_func_$1_link+set} != xset; then
 481       AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
 482         AC_TRY_LINK([#include <math.h>],
 483                     [ $1(0);],
 484                     [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
 485       ])
 486     fi
 487     AC_MSG_RESULT($glibcpp_cv_func_$1_link)
 488     if test x$glibcpp_cv_func_$1_link = x"yes"; then
 489       ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 490       AC_DEFINE_UNQUOTED(${ac_tr_func})
 491     fi
 492   fi
 493 ])
 494
 495
 496 dnl
 497 dnl Check to see what builtin math functions are supported
 498 dnl
 499 dnl check for __builtin_abs
 500 dnl check for __builtin_fabsf
 501 dnl check for __builtin_fabs
 502 dnl check for __builtin_fabl
 503 dnl check for __builtin_labs
 504 dnl check for __builtin_sqrtf
 505 dnl check for __builtin_sqrtl
 506 dnl check for __builtin_fsqrt
 507 dnl check for __builtin_sinf
 508 dnl check for __builtin_sin
 509 dnl check for __builtin_sinl
 510 dnl check for __builtin_cosf
 511 dnl check for __builtin_cos
 512 dnl check for __builtin_cosl
 513 dnl
 514 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 515 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
 516   dnl Test for builtin math functions.
 517   dnl These are made in gcc/c-common.c
 518   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
 519   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
 520   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
 521   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
 522   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
 523
 524   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
 525   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
 526   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
 527
 528   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
 529   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
 530   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
 531
 532   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
 533   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
 534   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
 535
 536   dnl There is, without a doubt, a more elegant way to have these
 537   dnl names exported so that they won't be stripped out of acconfig.h by
 538   dnl autoheader. I leave this as an exercise to somebody less frustrated
 539   dnl than I.... please email the libstdc++ list if you can figure out a
 540   dnl more elegant approach (see autoconf/acgen.m4 and specifically
 541   dnl AC_CHECK_FUNC for things to steal.)
 542   dummyvar=no
 543   if test x$dummyvar = x"yes"; then
 544     AC_DEFINE(HAVE___BUILTIN_ABS)
 545     AC_DEFINE(HAVE___BUILTIN_LABS)
 546     AC_DEFINE(HAVE___BUILTIN_COS)
 547     AC_DEFINE(HAVE___BUILTIN_COSF)
 548     AC_DEFINE(HAVE___BUILTIN_COSL)
 549     AC_DEFINE(HAVE___BUILTIN_FABS)
 550     AC_DEFINE(HAVE___BUILTIN_FABSF)
 551     AC_DEFINE(HAVE___BUILTIN_FABSL)
 552     AC_DEFINE(HAVE___BUILTIN_SIN)
 553     AC_DEFINE(HAVE___BUILTIN_SINF)
 554     AC_DEFINE(HAVE___BUILTIN_SINL)
 555     AC_DEFINE(HAVE___BUILTIN_FSQRT)
 556     AC_DEFINE(HAVE___BUILTIN_SQRTF)
 557     AC_DEFINE(HAVE___BUILTIN_SQRTL)
 558   fi
 559 ])
 560
 561
 562 dnl
 563 dnl Check to see what the underlying c library
 564 dnl These checks need to do two things:
 565 dnl 1) make sure the name is declared when using the c++ compiler
 566 dnl 2) make sure the name has "C" linkage
 567 dnl This might seem like overkill but experience has shown that it's not...
 568 dnl
 569 dnl Define HAVE_STRTOF etc if "strtof" is found.
 570 dnl Define HAVE_STRTOLD etc if "strtold" is found.
 571 dnl
 572 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
 573 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
 574   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 575   ac_save_CXXFLAGS="$CXXFLAGS"
 576   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 577
 578   AC_CHECK_FUNCS(strtof)
 579   GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
 580
 581   CXXFLAGS="$ac_save_CXXFLAGS"
 582 ])
 583
 584
 585 dnl
 586 dnl Check to see what the underlying c library or math library is like.
 587 dnl These checks need to do two things:
 588 dnl 1) make sure the name is declared when using the c++ compiler
 589 dnl 2) make sure the name has "C" linkage
 590 dnl This might seem like overkill but experience has shown that it's not...
 591 dnl
 592 dnl Define HAVE_CARGF etc if "cargf" is found.
 593 dnl
 594 dnl GLIBCPP_CHECK_MATH_SUPPORT
 595 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
 596   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 597   ac_save_CXXFLAGS="$CXXFLAGS"
 598   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 599
 600   dnl Check libm
 601   AC_CHECK_LIB(m, sin, libm="-lm")
 602   ac_save_LIBS="$LIBS"
 603   LIBS="$LIBS $libm"
 604
 605   dnl Check to see if certain C math functions exist.
 606   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
 607   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
 608   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
 609   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
 610   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
 611   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
 612   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
 613
 614   dnl Check to see if basic C math functions have float versions.
 615   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
 616   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
 617   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(acosf)
 618   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(asinf)
 619   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(atanf)
 620   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
 621   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(ceilf)
 622   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(cosf)
 623   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(coshf)
 624   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
 625   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
 626   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(floorf)
 627   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
 628   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
 629   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
 630   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
 631   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
 632   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
 633   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
 634   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinf)
 635   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinhf)
 636   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
 637   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanf)
 638   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanhf)
 639   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
 640   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
 641
 642   dnl Check to see if basic C math functions have long double versions.
 643   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
 644   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
 645   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
 646   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(acosl)
 647   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(asinl)
 648   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(atanl)
 649   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
 650   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(ceill)
 651   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(cosl)
 652   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(coshl)
 653   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
 654   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
 655   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(floorl)
 656   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
 657   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
 658   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
 659   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
 660   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
 661   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
 662   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
 663   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinl)
 664   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinhl)
 665   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
 666   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanl)
 667   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanhl)
 668   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
 669   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
 670
 671   dnl Some runtimes have these functions with a preceding underscore. Please
 672   dnl keep this sync'd with the one above. And if you add any new symbol,
 673   dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
 674   dnl Check to see if certain C math functions exist.
 675   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinf)
 676   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnan)
 677   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finite)
 678   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_copysign)
 679   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincos)
 680   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fpclass)
 681   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_qfpclass)
 682
 683   dnl Check to see if basic C math functions have float versions.
 684   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnanf)
 685   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinff)
 686   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_acosf)
 687   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_asinf)
 688   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_atanf)
 689   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_atan2f)
 690   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_ceilf)
 691   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_cosf)
 692   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_coshf)
 693   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_expf)
 694   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fabsf)
 695   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_floorf)
 696   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_fmodf)
 697   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_frexpf)
 698   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_ldexpf)
 699   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_logf)
 700   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_log10f)
 701   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_modff)
 702   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_powf)
 703   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinf)
 704   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinhf)
 705   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sqrtf)
 706   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanf)
 707   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanhf)
 708   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincosf)
 709   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finitef)
 710
 711   dnl Check to see if basic C math functions have long double versions.
 712   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnanl)
 713   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinfl)
 714   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_copysignl)
 715   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_acosl)
 716   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_asinl)
 717   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_atanl)
 718   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_atan2l)
 719   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_ceill)
 720   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_cosl)
 721   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_coshl)
 722   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_expl)
 723   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fabsl)
 724   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_floorl)
 725   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_fmodl)
 726   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_frexpl)
 727   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_ldexpl)
 728   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_logl)
 729   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_log10l)
 730   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_modfl)
 731   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_powl)
 732   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinl)
 733   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinhl)
 734   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sqrtl)
 735   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanl)
 736   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanhl)
 737   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincosl)
 738   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finitel)
 739
 740   LIBS="$ac_save_LIBS"
 741   CXXFLAGS="$ac_save_CXXFLAGS"
 742 ])
 743
 744
 745 dnl
 746 dnl Check to see if there is native support for complex
 747 dnl
 748 dnl Don't compile bits in math/* if native support exits.
 749 dnl
 750 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
 751 dnl
 752 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 753 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
 754   dnl Check for complex versions of math functions of platform.
 755   AC_CHECK_HEADERS([complex.h])
 756   AC_CHECK_LIB(m, main)
 757   AC_REPLACE_MATHFUNCS(csqrt csqrtf nan hypot hypotf atan2f expf \
 758   copysignf)
 759
 760   dnl Compile the long double complex functions only if the function
 761   dnl provides the non-complex long double functions that are needed.
 762   dnl Currently this includes copysignl and atan2l, which should be
 763   dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
 764   USE_COMPLEX_LONG_DOUBLE=no
 765   if test x$ac_cv_func_atan2l = x"yes" \
 766      && test x$ac_cv_func_copysignl = x"yes"; then
 767     USE_COMPLEX_LONG_DOUBLE=yes
 768     AC_REPLACE_MATHFUNCS(csqrtl hypotl signbitl)
 769   fi
 770
 771   AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
 772 ])
 773
 774
 775 dnl Check to see what architecture and operating system we are compiling
 776 dnl for.  Also, if architecture- or OS-specific flags are required for
 777 dnl compilation, pick them up here.
 778 dnl
 779 dnl GLIBCPP_CHECK_TARGET
 780 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
 781     . [$]{glibcpp_basedir}/configure.target
 782     AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
 783     AC_MSG_RESULT(OS config directory is $os_include_dir)
 784     AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
 785 ])
 786
 787
 788 dnl
 789 dnl Check to see what the underlying c library's interface to ctype looks
 790 dnl like. Bits of locale rely on things like isspace, toupper, etc. This
 791 dnl stuff makes sure the right bits from the clibrary get called.
 792 dnl
 793 dnl Depending on what is found, select various configure/*/bits/ctype_base.h
 794 dnl Depending on what is found, select various configure/*/ctype.cc
 795 dnl
 796 dnl GLIBCPP_CHECK_CTYPE_SUPPORT
 797 AC_DEFUN(GLIBCPP_CHECK_CTYPE_SUPPORT, [
 798   AC_CHECK_HEADER(ctype.h, [
 799
 800     dnl If doesn't match any specified, go with defaults.
 801     ctype_default=yes
 802
 803     dnl Test for <ctype> functionality -- GNU/Linux
 804     AC_MSG_CHECKING([<ctype> for GNU/Linux])
 805     AC_TRY_COMPILE([#include <ctype.h>],
 806     [int
 807     foo (int a)
 808     { return _ISspace + _ISprint + _IScntrl + _ISupper + _ISlower + _ISalpha \
 809         + _ISdigit + _ISpunct + _ISxdigit + _ISalnum + _ISgraph \
 810         + __ctype_tolower[a] + __ctype_toupper[a] + __ctype_b[a];}], \
 811     ctype_linux=yes, ctype_linux=no)
 812     AC_MSG_RESULT($ctype_linux)
 813     if test $ctype_linux = "yes"; then
 814       ctype_include_dir="config/os/gnu-linux"
 815       ctype_default=no
 816     fi
 817
 818     dnl Test for <ctype> functionality -- FreeBSD 4.0
 819     if test $ctype_default = "yes"; then
 820     AC_MSG_CHECKING([<ctype> for FreeBSD 4.0])
 821     AC_TRY_COMPILE([#include <ctype.h>],
 822     [int
 823     foo (int a)
 824     { return _CTYPE_S + _CTYPE_R + _CTYPE_C + _CTYPE_U + _CTYPE_L + _CTYPE_A \
 825         + _CTYPE_D + _CTYPE_P + _CTYPE_X + _CTYPE_G ;}], \
 826     ctype_bsd=yes, ctype_bsd=no)
 827     AC_MSG_RESULT($ctype_bsd)
 828     if test $ctype_bsd = "yes"; then
 829       ctype_include_dir="config/os/bsd/freebsd"
 830       ctype_default=no
 831     fi
 832     fi
 833
 834     dnl Test for <ctype> functionality -- FreeBSD 3.4
 835     if test $ctype_default = "yes"; then
 836     AC_MSG_CHECKING([<ctype> for FreeBSD 3.4])
 837     AC_TRY_COMPILE([#include <ctype.h>],
 838     [int
 839     foo (int a)
 840     { return _S + _R + _C + _U + _L + _A \
 841       + _D + _P + _X + _G + __istype (a, 0);}], \
 842     ctype_freebsd34=yes, ctype_freebsd34=no)
 843     AC_MSG_RESULT($ctype_freebsd34)
 844     if test $ctype_freebsd34 = "yes"; then
 845       ctype_include_dir="config/os/bsd/freebsd"
 846       ctype_default=no
 847     fi
 848     fi
 849
 850     dnl Test for <ctype> functionality -- NetBSD
 851     if test $ctype_default = "yes"; then
 852     AC_MSG_CHECKING([<ctype> for NetBSD])
 853     AC_TRY_COMPILE([#include <ctype.h>],
 854     [int
 855     foo (int a)
 856     { return _S + _C + _U + _L \
 857       + _N + _P + _X + _tolower_tab_[a] + _toupper_tab_[a];}], \
 858     ctype_netbsd=yes, ctype_netbsd=no)
 859     AC_MSG_RESULT($ctype_netbsd)
 860     if test $ctype_netbsd = "yes"; then
 861       ctype_include_dir="config/os/bsd/netbsd"
 862       ctype_default=no
 863     fi
 864     fi
 865
 866     dnl Test for <ctype> functionality -- Solaris 2.6 and up
 867     if test $ctype_default = "yes"; then
 868     AC_MSG_CHECKING([<ctype> for Solaris 2.6,7,8])
 869     AC_TRY_COMPILE([#include <ctype.h>],
 870     [int
 871     foo (int a)
 872     { return _ISSPACE + _ISPRINT + _ISCNTRL + _ISUPPER + _ISLOWER + _ISALPHA \
 873         + _ISDIGIT + _ISPUNCT + _ISXDIGIT + _ISALNUM + _ISGRAPH \
 874         + __trans_lower[a] + __trans_upper[a] + __ctype_mask[a];}], \
 875     ctype_solaris=yes, ctype_solaris=no)
 876     AC_MSG_RESULT($ctype_solaris)
 877
 878     if test $ctype_solaris = "yes"; then
 879       AC_MSG_CHECKING([  for version])
 880       AC_LANG_CPLUSPLUS
 881       AC_TRY_COMPILE([#include <ctype.h>],
 882       [typedef long* __to_type; __to_type const& _M_toupper = __trans_upper;],\
 883       ctype_solaris26=yes, ctype_solaris26=no)
 884       AC_LANG_C
 885       if test $ctype_solaris26 = "yes"; then
 886         ctype_include_dir="config/os/solaris/solaris2.6"
 887         AC_MSG_RESULT([Solaris 2.6])
 888         ctype_default=no
 889       else
 890         ctype_include_dir="config/os/solaris/solaris2.7"
 891         AC_MSG_RESULT([Solaris 7,8])
 892         ctype_default=no
 893       fi
 894     fi
 895     fi
 896
 897     dnl Test for <ctype> functionality -- Solaris 2.5.1
 898     if test $ctype_default = "yes"; then
 899     AC_MSG_CHECKING([<ctype> for Solaris 2.5.1])
 900     AC_TRY_COMPILE([#include <ctype.h>],
 901     [int
 902     foo (int a)
 903     { return _U + _L + _N + _S + _P + _C + _X + _B \
 904         + __ctype[a];}], \
 905     ctype_solaris25=yes, ctype_solaris25=no)
 906     AC_MSG_RESULT($ctype_solaris25)
 907     if test $ctype_solaris25 = "yes"; then
 908       ctype_include_dir="config/os/solaris/solaris2.5"
 909       ctype_default=no
 910     fi
 911     fi
 912
 913     dnl Test for <ctype> functionality -- AIX
 914     if test $ctype_default = "yes"; then
 915     AC_MSG_CHECKING([<ctype> for AIX])
 916     AC_TRY_COMPILE([#include <ctype.h>],
 917     [int
 918     foo (int a)
 919     { return _ISSPACE + _ISPRINT + _ISCNTRL + _ISUPPER + _ISLOWER + _ISALPHA \
 920         + _ISDIGIT + _ISPUNCT + _ISXDIGIT + _ISALNUM + _ISGRAPH \
 921         + _VALC('a') + _IS('c', 0);}], \
 922     ctype_aix=yes, ctype_aix=no)
 923     AC_MSG_RESULT($ctype_aix)
 924     if test $ctype_aix = "yes"; then
 925       ctype_include_dir="config/os/aix"
 926       ctype_default=no
 927     fi
 928     fi
 929
 930     dnl Test for <ctype> functionality -- IRIX
 931     if test $ctype_default = "yes"; then
 932     AC_MSG_CHECKING([<ctype> for IRIX])
 933     AC_TRY_COMPILE([#include <ctype.h>],
 934     [int
 935     foo (int a)
 936     { return _U + _L + _N + _S + _P + _C + _B + _X + \
 937              _A + _PR + _G + _BL;}], \
 938     ctype_irix=yes, ctype_irix=no)
 939     AC_MSG_RESULT($ctype_irix)
 940     if test $ctype_irix = "yes"; then
 941       ctype_include_dir="config/os/irix"
 942       ctype_default=no
 943     fi
 944     fi
 945
 946     dnl Test for <ctype> functionality -- newlib
 947     if test $ctype_default = "yes"; then
 948     AC_MSG_CHECKING([<ctype> for newlib])
 949     AC_TRY_COMPILE([#include <ctype.h>],
 950     [int
 951     foo (int a)
 952     { return _U + _L + _N + _S + _P + _C + _X + _B \
 953         + _ctype_[a];}], \
 954     ctype_newlib=yes, ctype_newlib=no)
 955     AC_MSG_RESULT($ctype_newlib)
 956     if test $ctype_newlib = "yes"; then
 957       ctype_include_dir="config/os/newlib"
 958       ctype_default=no
 959     fi
 960     fi
 961
 962     if test $ctype_default = "yes"; then
 963       ctype_include_dir="config/os/generic"
 964       AC_MSG_WARN("Using default ctype headers.")
 965     fi
 966
 967     AC_LINK_FILES($ctype_include_dir/bits/ctype_base.h,
 968     include/bits/ctype_base.h)
 969     AC_LINK_FILES($ctype_include_dir/bits/ctype_inline.h,
 970     include/bits/ctype_inline.h)
 971     AC_LINK_FILES($ctype_include_dir/bits/ctype_noninline.h, \
 972     include/bits/ctype_noninline.h)
 973   ])
 974 ])
 975
 976
 977 dnl
 978 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
 979 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled.  (This
 980 dnl must have been previously checked.)
 981 dnl
 982 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
 983 dnl Define _GLIBCPP_NEED_MBSTATE_T if mbstate_t is not in wchar.h
 984 dnl
 985 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
 986 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
 987   if test x$enable_c_mbchar != xno; then
 988
 989     dnl Sanity check for existence of ISO C99 headers for extended encoding.
 990     AC_CHECK_HEADER(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
 991     AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
 992
 993     dnl Only continue checking if the ISO C99 headers exist.
 994     if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes; then
 995
 996       dnl Test wchar.h for mbstate_t, which is needed for char_traits
 997       dnl and others.
 998       AC_MSG_CHECKING([for mbstate_t])
 999       AC_TRY_COMPILE([#include <wchar.h>],
1000       [mbstate_t teststate;],
1001       use_native_mbstatet=yes, use_native_mbstatet=no)
1002       AC_MSG_RESULT($use_native_mbstatet)
1003
1004       dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
1005       dnl numeric_limits can instantiate type_traits<wchar_t>
1006       AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
1007       AC_TRY_COMPILE([#include <wchar.h>],
1008       [int i = WCHAR_MIN; int j = WCHAR_MAX;],
1009       has_wchar_minmax=yes, has_wchar_minmax=no)
1010       AC_MSG_RESULT($has_wchar_minmax)
1011
1012       dnl Test wchar.h for WEOF, which is what we use to determine whether
1013       dnl to specialize for char_traits<wchar_t> or not.
1014       AC_MSG_CHECKING([for WEOF])
1015       AC_TRY_COMPILE([
1016         #include <wchar.h>
1017         #include <stddef.h>],
1018       [wint_t i = WEOF;],
1019       has_weof=yes, has_weof=no)
1020       AC_MSG_RESULT($has_weof)
1021
1022       dnl Tests for wide character functions used in char_traits<wchar_t>.
1023       AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset \
1024       wcsrtombs mbsrtowcs, ac_wfuncs=yes, ac_wfuncs=no)
1025
1026       AC_MSG_CHECKING([for ISO C99 wchar_t support])
1027       if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
1028          && test x"$ac_wfuncs" = xyes; then
1029         ac_isoC99_wchar_t=yes
1030       else
1031         ac_isoC99_wchar_t=no
1032       fi
1033       AC_MSG_RESULT($ac_isoC99_wchar_t)
1034
1035       dnl Use iconv for wchar_t to char conversions. As such, check for
1036       dnl X/Open Portability Guide, version 2 features (XPG2).
1037       AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
1038       AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
1039
1040       dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
1041       AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
1042       ac_save_LIBS="$LIBS"
1043       LIBS="$LIBS $libiconv"
1044
1045       AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
1046       ac_XPG2funcs=yes, ac_XPG2funcs=no)
1047
1048       LIBS="$ac_save_LIBS"
1049
1050       AC_MSG_CHECKING([for XPG2 wchar_t support])
1051       if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
1052          && test x"$ac_XPG2funcs" = xyes; then
1053         ac_XPG2_wchar_t=yes
1054       else
1055         ac_XPG2_wchar_t=no
1056       fi
1057       AC_MSG_RESULT($ac_XPG2_wchar_t)
1058
1059       dnl At the moment, only enable wchar_t specializations if all the
1060       dnl above support is present.
1061       AC_MSG_CHECKING([for enabled wchar_t specializations])
1062       if test x"$ac_isoC99_wchar_t" = xyes \
1063          && test x"$ac_XPG2_wchar_t" = xyes; then
1064         libinst_wstring_la="libinst-wstring.la"
1065         AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
1066         AC_MSG_RESULT("yes")
1067       else
1068         libinst_wstring_la=""
1069         AC_MSG_RESULT("no")
1070       fi
1071       AC_SUBST(libinst_wstring_la)
1072
1073     else
1074       AC_MSG_WARN([<wchar.h> not found])
1075     fi
1076
1077   else
1078     dnl Wide characters disabled by the user.  Maybe print a warning?
1079     :
1080   fi
1081 ])
1082
1083
1084 dnl
1085 dnl Check to see if this version of GNU C++ is afflicted by bugs in
1086 dnl __complex__ float support.
1087 dnl
1088 dnl Define _GLIBCPP_BUGGY_FLOAT_COMPLEX if buggy.
1089 dnl
1090 dnl Check to see if this version of GNU C++ is afflicted by bugs in
1091 dnl __complex__ support.Check for buggy __complex__ that will cause ICE in
1092 dnl gcc-2.95.x when using the library, unless we define the default copy
1093 dnl ctor in the specializations of complex<>.
1094 dnl
1095 dnl Define _GLIBCPP_BUGGY_COMPLEX if buggy.
1096 dnl GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
1097 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT, [
1098   AC_REQUIRE([AC_PROG_CXX])
1099
1100   AC_MSG_CHECKING([for GNU C++ __complex__ support])
1101   AC_CACHE_VAL(glibcpp_cv_complex, [
1102     AC_LANG_SAVE
1103     AC_LANG_CPLUSPLUS
1104     AC_TRY_COMPILE([struct dcomplex { __complex__ double x; }; \
1105                     dcomplex f(const dcomplex& x) { return dcomplex(x); }], \
1106                     [ dcomplex x; f(x); ],
1107       glibcpp_cv_complex=ok,
1108       glibcpp_cv_complex=buggy
1109     )
1110     AC_LANG_RESTORE
1111   ])
1112   AC_MSG_RESULT($glibcpp_cv_complex)
1113   if test $glibcpp_cv_complex = buggy; then
1114     AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
1115   fi
1116
1117   AC_MSG_CHECKING([for GNU C++ __complex__ float support])
1118   AC_CACHE_VAL(glibcpp_cv_float_complex, [
1119     AC_LANG_SAVE
1120     AC_LANG_CPLUSPLUS
1121     rm -f conftest.h
1122     cat > conftest.h <<EOB
1123       //
1124       // Check for buggy __complex__ that causes ICE in most versions of egcs
1125       // and gcc-2.95.x on certain platforms (eg., x86-win32).
1126       //
1127       // See http://gcc.gnu.org/ml/gcc-bugs/1999-07n/msg00845.html for
1128       // more info on the bug itself.
1129       //
1130       struct
1131       float_complex
1132       {
1133        __complex__ float m_value;
1134        float_complex (float = 0.0f, float = 0.0f);
1135        float_complex (__complex__ float val) : m_value (val) {}
1136        float_complex foo (const float_complex &val)
1137          { return float_complex (~val.m_value); }
1138       };
1139 EOB
1140     AC_TRY_COMPILE([#include "conftest.h"], ,
1141       glibcpp_cv_float_complex=ok,
1142       glibcpp_cv_float_complex=buggy
1143     )
1144     AC_LANG_RESTORE
1145   ])
1146   AC_MSG_RESULT($glibcpp_cv_float_complex)
1147   if test $glibcpp_cv_float_complex = buggy; then
1148     AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
1149   fi
1150 ])
1151
1152
1153 dnl
1154 dnl Check for special debugging mode; not for production use.
1155 dnl
1156 dnl GLIBCPP_ENABLE_DEBUG
1157 dnl --enable-debug sets '-ggdb3 -O0'.
1158 dnl --disable-debug sets '-g' and whatever optimization options the
1159 dnl     compiler can handle.
1160 dnl  +  --enable-maintainer-mode automatically defaults this to on.
1161 dnl  +  Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
1162 dnl  +  Usage:  GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
1163 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1164 dnl       defaults to `no'.
1165 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
1166 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
1167 AC_ARG_ENABLE(debug,
1168 changequote(<<, >>)dnl
1169 <<  --enable-debug          extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
1170 changequote([, ])dnl
1171 [case "${enableval}" in
1172  yes) enable_debug=yes ;;
1173  no)  enable_debug=no ;;
1174  *)   AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
1175  esac],
1176 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
1177
1178 dnl Option parsed, now set things appropriately
1179 case "${enable_debug}" in
1180     yes)
1181         DEBUG_FLAGS='-O0 -ggdb3'
1182         ;;
1183     no)
1184         DEBUG_FLAGS='-g'
1185         ;;
1186 esac
1187 AC_SUBST(DEBUG_FLAGS)
1188 ])
1189
1190
1191 dnl
1192 dnl Check for "unusual" flags to pass to the compiler while building.
1193 dnl
1194 dnl GLIBCPP_ENABLE_CXX_FLAGS
1195 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1196 dnl     experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
1197 dnl     Somehow this same set of flags must be passed when [re]building
1198 dnl     libgcc.
1199 dnl --disable-cxx-flags passes nothing.
1200 dnl  +  See http://sourceware.cygnus.com/ml/libstdc++/2000-q2/msg00131.html
1201 dnl         http://sourceware.cygnus.com/ml/libstdc++/2000-q2/msg00284.html
1202 dnl         http://sourceware.cygnus.com/ml/libstdc++/2000-q1/msg00035.html
1203 dnl  +  Usage:  GLIBCPP_ENABLE_CXX_FLAGS(default flags)
1204 dnl       If "default flags" is an empty string (or "none"), the effect is
1205 dnl       the same as --disable or --enable=no.
1206 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
1207 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1208 AC_ARG_ENABLE(cxx-flags,
1209 changequote(<<, >>)dnl
1210 <<  --enable-cxx-flags=FLAGS      pass compiler FLAGS when building library;
1211                                 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
1212 changequote([, ])dnl
1213 [case "x$enableval" in
1214  xyes)
1215         AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
1216  xno|x)
1217         enable_cxx_flags='' ;;
1218  *)
1219         enable_cxx_flags="$enableval" ;;
1220  esac],
1221 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
1222
1223 dnl Thinko on my part during design.  This kludge is the workaround.
1224 if test "$enable_cxx_flags" = "none"; then
1225   enable_cxx_flags='';
1226 fi
1227
1228 dnl Run through flags (either default or command-line) and set anything
1229 dnl extra (e.g., #defines) that must accompany particular g++ options.
1230 if test -n "$enable_cxx_flags"; then
1231     for f in $enable_cxx_flags; do
1232         case "$f" in
1233             -fhonor-std)  ;;
1234             -*)  ;;
1235             *)   # and we're trying to pass /what/ exactly?
1236                  AC_MSG_ERROR([compiler flags start with a -]) ;;
1237         esac
1238     done
1239 fi
1240 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1241 AC_SUBST(EXTRA_CXX_FLAGS)
1242 ])
1243
1244
1245 dnl
1246 dnl Check for which I/O library to use:  libio, or something specific.
1247 dnl
1248 dnl GLIBCPP_ENABLE_CSTDIO
1249 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1250 dnl
1251 dnl default is stdio
1252 dnl
1253 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1254   AC_MSG_CHECKING([for cstdio to use])
1255   AC_ARG_ENABLE(cstdio,
1256   [  --enable-cstdio        enable stdio for target io package. (default)
1257      --enable-cstdio=LIB    use LIB target-speific io package.],
1258   if test x$enable_cstdio = xno; then
1259      enable_cstdio=stdio
1260   fi,
1261      enable_cstdio=stdio)
1262
1263   enable_cstdio_flag=$enable_cstdio
1264
1265   dnl Check if a valid I/O package
1266   case x${enable_cstdio_flag} in
1267     xlibio)
1268       CSTDIO_H=config/c_io_libio.h
1269       CSTDIO_CC=config/c_io_libio.cc
1270       AC_MSG_RESULT(libio)
1271
1272       # see if we are on a system with libio native (ie, linux)
1273       AC_CHECK_HEADER(libio.h,  has_libio=yes, has_libio=no)
1274
1275       # Need to check and see what version of glibc is being used. If
1276       # it's not glibc-2.2 or higher, then we'll need to go ahead and
1277       # compile most of libio for linux systems.
1278       if test x$has_libio = x"yes"; then
1279         case "$target" in
1280           *-*-linux*)
1281               AC_MSG_CHECKING([for glibc version >= 2.2])
1282               AC_EGREP_CPP([ok], [
1283             #include <features.h>
1284               #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1285                     ok
1286               #endif
1287               ], glibc_satisfactory=yes, glibc_satisfactory=no)
1288               AC_MSG_RESULT($glibc_satisfactory)
1289             ;;
1290         esac
1291
1292         # XXX at the moment, admit defeat and force the recompilation
1293         # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1294         glibc_satisfactory=no
1295
1296         if test x$glibc_satisfactory = x"yes"; then
1297            need_libio=no
1298            need_wlibio=no
1299         else
1300            need_libio=yes
1301            # bkoz XXX need to add checks to enable this
1302            # pme XXX here's a first pass at such a check
1303            if test x$enable_c_mbchar != xno; then
1304               need_wlibio=yes
1305            else
1306               need_wlibio=no
1307            fi
1308         fi
1309
1310       else
1311          # Using libio, but <libio.h> doesn't exist on the target system. . .
1312          need_libio=yes
1313          # bkoz XXX need to add checks to enable this
1314          # pme XXX here's a first pass at such a check
1315          if test x$enable_c_mbchar != xno; then
1316              need_wlibio=yes
1317          else
1318              need_wlibio=no
1319          fi
1320       fi
1321       ;;
1322     xstdio | x | xno | xnone | xyes)
1323       # default
1324       CSTDIO_H=config/c_io_stdio.h
1325       CSTDIO_CC=config/c_io_stdio.cc
1326       AC_MSG_RESULT(stdio)
1327
1328       # We're not using stdio.
1329       need_libio=no
1330       need_wlibio=no
1331       # Wide characters are not supported with this package.
1332       enable_c_mbchar=no
1333       ;;
1334     *)
1335       echo "$enable_cstdio is an unknown io package" 1>&2
1336       exit 1
1337       ;;
1338   esac
1339   AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1340   AC_LINK_FILES($CSTDIO_CC, src/c++io.cc)
1341
1342   # 2000-08-04 bkoz hack
1343   CCODECVT_C=config/c_io_libio_codecvt.c
1344   AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1345   # 2000-08-04 bkoz hack
1346
1347   AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1348                  test "$need_libio" = yes || test "$need_wlibio" = yes)
1349   AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1350   AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1351   if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1352         libio_la=../libio/libio.la
1353   else
1354         libio_la=
1355   fi
1356   AC_SUBST(libio_la)
1357 ])
1358
1359
1360 dnl
1361 dnl Check for which threading library to use.
1362 dnl
1363 dnl GLIBCPP_ENABLE_THREADS
1364 dnl --enable-threads=posix sets config/threads-posix.h et. al.
1365 dnl
1366 dnl Default is no threads, which also disables _IO_MTSAFE_IO in
1367 dnl libio.  Any actual thread package will enable it.
1368 dnl
1369 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1370   dnl Note this comes from the gcc/config.in and libjava/config.in
1371   dnl Efforts should be made to keep this in sync.
1372   AC_MSG_CHECKING([for threads package to use])
1373   AC_ARG_ENABLE(threads,
1374   [  --enable-threads        enable thread usage for target GCC.
1375      --enable-threads=LIB    use LIB thread package for target GCC.],
1376   if test x$enable_threads = xno; then
1377     enable_threads=''
1378   fi,
1379     enable_threads='')
1380
1381   enable_threads_flag=$enable_threads
1382
1383   dnl Check if a valid thread package
1384   case x${enable_threads_flag} in
1385         x | xno | xnone)
1386                 # No threads
1387                 target_thread_file='single'
1388                 ;;
1389         xyes)
1390                 # default
1391                 target_thread_file='posix'
1392                 ;;
1393         xdecosf1 | xirix | xmach | xos2 | xposix | xpthreads | xsingle | \
1394         xsolaris | xwin32 | xdce | xvxworks)
1395                 target_thread_file=$enable_threads_flag
1396                 ;;
1397         *)
1398                 echo "$enable_threads is an unknown thread package" 1>&2
1399                 exit 1
1400                 ;;
1401   esac
1402
1403   dnl Check for thread package actually supported in libstdc++
1404   THREADH=
1405   case "$target_thread_file" in
1406     no | none | single)
1407       THREADH=threads-no.h
1408       ;;
1409     posix | pthreads)
1410       THREADH=threads-posix.h
1411       ;;
1412     decosf1 | irix | mach | os2 | solaris | win32 | dce | vxworks)
1413       AC_MSG_ERROR(thread package $THREADS not yet supported)
1414       ;;
1415     *)
1416       AC_MSG_ERROR($THREADS is an unsupported/unknown thread package)
1417       ;;
1418   esac
1419   AC_MSG_RESULT($THREADH)
1420
1421   AC_LINK_FILES(config/$THREADH, include/bits/c++threads.h)
1422   if test $THREADH != threads-no.h; then
1423     AC_DEFINE(_GLIBCPP_USE_THREADS)
1424   fi
1425 ])
1426
1427
1428 dnl Enable atomic locking
1429 dnl GLIBCPP_ENABLE_ATOMICITY
1430 AC_DEFUN(GLIBCPP_ENABLE_ATOMICITY, [
1431     AC_MSG_CHECKING([for atomicity.h])
1432     # We have ATOMICITY already from GLIBCPP_CONFIGURE
1433     if test "$ATOMICITYH" = "config/cpu/generic"; then
1434       AC_MSG_WARN([No ATOMICITY settings found, using generic atomic ops.])
1435     fi
1436     AC_MSG_RESULT($ATOMICITYH/bits/atomicity.h)
1437     AC_LINK_FILES($ATOMICITYH/bits/atomicity.h, include/bits/atomicity.h)
1438 ])
1439
1440
1441 dnl
1442 dnl Check for template specializations for the 'long long' type extension.
1443 dnl
1444 dnl GLIBCPP_ENABLE_LONG_LONG
1445 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1446 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1447 dnl  +  Usage:  GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1448 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1449 dnl       defaults to `no'.
1450 dnl  +  If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1451 dnl
1452 dnl GLIBCPP_ENABLE_LONG_LONG
1453 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1454   define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1455
1456   AC_ARG_ENABLE(long-long,
1457   changequote(<<, >>)dnl
1458   <<--enable-long-long      turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1459   changequote([, ])dnl
1460   [case "$enableval" in
1461    yes) enable_long_long=yes ;;
1462    no)  enable_long_long=no ;;
1463    *)   AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1464    esac],
1465   enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1466
1467   # Allow use of os-dependent settings, so that macros that turn on
1468   # C99 capabilities can be defined and used in a consistent way.
1469   OS_INC_PATH=${srcdir}/$os_include_dir
1470   ac_test_CFLAGS="${CFLAGS+set}"
1471   ac_save_CFLAGS="$CFLAGS"
1472   CFLAGS="-I$OS_INC_PATH"
1473
1474   # Check for the existence of functions used if long long is enabled.
1475   AC_CHECK_FUNC(strtoll,,ac_strtoll=no)
1476   AC_CHECK_FUNC(strtoull,,ac_strtoull=no)
1477
1478   # Check for lldiv_t, et. al.
1479   AC_MSG_CHECKING([for lldiv_t declaration])
1480   AC_CACHE_VAL(glibcpp_lldiv_t_use, [
1481   AC_TRY_COMPILE([#include <bits/os_defines.h>
1482                   #include <stdlib.h>],
1483                    [ lldiv_t mydivt;],
1484                    [glibcpp_lldiv_t_use=yes], [glibcpp_lldiv_t_use=no])
1485   ])
1486   AC_MSG_RESULT($glibcpp_lldiv_t_use)
1487   if test x$glibcpp_lldiv_t_use = x"yes"; then
1488     AC_DEFINE(HAVE_LLDIV_T)
1489   fi
1490
1491   AC_MSG_CHECKING([for enabled long long])
1492   if test x"$ac_strtoll" = xno || test x"$ac_strtoull" = xno; then
1493     enable_long_long=no;
1494   fi;
1495   AC_MSG_RESULT($enable_long_long)
1496
1497   # Option parsed, now set things appropriately
1498   if test x"$enable_long_long" = xyes; then
1499     AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1500   fi
1501
1502   # Reset CFLAGS
1503   CFLAGS="$ac_save_CFLAGS"
1504 ])
1505
1506
1507 dnl
1508 dnl Check for whether or not to do shadowed C headers.
1509 dnl
1510 dnl GLIBCPP_ENABLE_SHADOW
1511 dnl --enable-cshadow-headers [does stuff].
1512 dnl --disable-cshadow-headers [does not do stuff].
1513 dnl  +  This will eventually need to be on by default.
1514 dnl  +  Usage:  GLIBCPP_ENABLE_SHADOW[(DEFAULT)]
1515 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1516 dnl       defaults to `no'.
1517 AC_DEFUN(GLIBCPP_ENABLE_SHADOW, [dnl
1518 define([GLIBCPP_ENABLE_SHADOW_DEFAULT], ifelse($1, yes, yes, no))dnl
1519 AC_MSG_CHECKING([for enabled cshadow headers])
1520 AC_ARG_ENABLE(cshadow-headers,
1521 changequote(<<, >>)dnl
1522 <<  --enable-cshadow-headers construct "shadowed" C header files for
1523                            g++ [default=>>GLIBCPP_ENABLE_SHADOW_DEFAULT],
1524 changequote([, ])
1525   [case "$enableval" in
1526    yes) enable_cshadow_headers=yes
1527         ;;
1528    no)  enable_cshadow_headers=no
1529         ;;
1530    *)   AC_MSG_ERROR([Unknown argument to enable/disable shadowed C headers])
1531         ;;
1532   esac],
1533   enable_cshadow_headers=GLIBCPP_ENABLE_SHADOW_DEFAULT)
1534   AC_MSG_RESULT($enable_cshadow_headers)
1535
1536   dnl Option parsed, now set things appropriately
1537   dnl NB: these things may be duplicated in c++config.h as well.
1538   case "$enable_cshadow_headers" in
1539     yes)
1540         CSHADOW_FLAGS="-fno-builtin"
1541         C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1542         AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1543         ;;
1544     no)
1545         CSHADOW_FLAGS=""
1546         C_INCLUDE_DIR='${top_srcdir}/include/c'
1547         ;;
1548   esac
1549
1550   AC_SUBST(CSHADOW_FLAGS)
1551   AC_SUBST(C_INCLUDE_DIR)
1552   AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cshadow_headers" = yes)
1553 ])
1554
1555
1556 dnl
1557 dnl Check for wide character support.  Has the same effect as the option
1558 dnl in gcc's configure, but in a form that autoconf can mess with.
1559 dnl
1560 dnl GLIBCPP_ENABLE_C_MBCHAR
1561 dnl --enable-c-mbchar requests all the wchar_t stuff.
1562 dnl --disable-c-mbchar doesn't.
1563 dnl  +  Usage:  GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1564 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1565 dnl       defaults to `no'.
1566 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1567 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1568 AC_ARG_ENABLE(c-mbchar,
1569 changequote(<<, >>)dnl
1570 <<  --enable-c-mbchar       enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1571 changequote([, ])dnl
1572 [case "$enableval" in
1573  yes) enable_c_mbchar=yes ;;
1574  no)  enable_c_mbchar=no ;;
1575  *)   AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1576  esac],
1577 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1578 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1579 ])
1580
1581
1582 dnl
1583 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1584 dnl
1585 dnl GLIBCPP_INCLUDE_DIR
1586 dnl C_INCLUDE_DIR
1587 dnl TOPLEVEL_INCLUDES
1588 dnl LIBMATH_INCLUDES
1589 dnl LIBSUPCXX_INCLUDES
1590 dnl LIBIO_INCLUDES
1591 dnl CSHADOW_INCLUDES
1592 dnl
1593 dnl GLIBCPP_EXPORT_INCLUDE
1594 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1595   # Root level of the include sources.
1596   GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1597
1598   # Can either use include/c or include/c_std to grab "C" headers. This
1599   # variable is set to the include directory currently in use.
1600   # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_SHADOW
1601
1602   # Passed down for canadian crosses.
1603   if  test x"$CANADIAN" = xyes; then
1604     TOPLEVEL_INCLUDES='-I$(includedir)'
1605   fi
1606
1607   LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1608
1609   LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1610
1611   #if GLIBCPP_NEED_LIBIO
1612   LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1613   #else
1614   #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1615   #endif
1616
1617   #if GLIBCPP_USE_CSHADOW
1618   #  CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1619   #                   -I$(top_blddir)/cshadow'
1620   #else
1621   CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1622   #endif
1623
1624   # Now, export this to all the little Makefiles....
1625   AC_SUBST(GLIBCPP_INCLUDE_DIR)
1626   AC_SUBST(TOPLEVEL_INCLUDES)
1627   AC_SUBST(LIBMATH_INCLUDES)
1628   AC_SUBST(LIBSUPCXX_INCLUDES)
1629   AC_SUBST(LIBIO_INCLUDES)
1630   AC_SUBST(CSHADOW_INCLUDES)
1631 ])
1632
1633
1634 dnl
1635 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1636 dnl
1637 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1638   # Optimization flags that are probably a good idea for thrill-seekers. Just
1639   # uncomment the lines below and make, everything else is ready to go...
1640   # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1641   OPTIMIZE_CXXFLAGS=
1642   AC_SUBST(OPTIMIZE_CXXFLAGS)
1643
1644   WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1645   AC_SUBST(WARN_FLAGS)
1646 ])
1647
1648
1649 # Check whether LC_MESSAGES is available in <locale.h>.
1650 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1651 #
1652 # This file file be copied and used freely without restrictions.  It can
1653 # be used in projects which are not available under the GNU Public License
1654 # but which still want to provide support for the GNU gettext functionality.
1655 # Please note that the actual code is *not* freely available.
1656
1657 # serial 1
1658
1659 AC_DEFUN(AC_LC_MESSAGES, [
1660   AC_CHECK_HEADER(locale.h, [
1661     AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1662       [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1663        ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1664     if test $ac_cv_val_LC_MESSAGES = yes; then
1665       AC_DEFINE(HAVE_LC_MESSAGES)
1666     fi
1667   ])
1668 ])
1669
1670
1671 # Check for functions in math library.
1672 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1673 #
1674 # This file can be copied and used freely without restrictions.  It can
1675 # be used in projects which are not available under the GNU Public License
1676 # but which still want to provide support for the GNU gettext functionality.
1677 # Please note that the actual code is *not* freely available.
1678
1679 # serial 1
1680
1681 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1682 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1683 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1684 AC_SUBST(LIBMATHOBJS)dnl
1685 ])
1686
1687
1688 # Check for string functions.
1689 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1690 #
1691 # This file can be copied and used freely without restrictions.  It can
1692 # be used in projects which are not available under the GNU Public License
1693 # but which still want to provide support for the GNU gettext functionality.
1694 # Please note that the actual code is *not* freely available.
1695
1696 # serial 1
1697
1698 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1699 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1700 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1701 AC_SUBST(LIBSTRINGOBJS)dnl
1702 ])
1703
1704
1705 dnl This macro searches for a GNU version of make.  If a match is found, the
1706 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1707 dnl set to "#". This is useful for  including a special features in a Makefile,
1708 dnl which cannot be handled by other versions of make.  The variable
1709 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1710 dnl the empty string otherwise.
1711 dnl
1712 dnl Here is an example of its use:
1713 dnl
1714 dnl Makefile.in might contain:
1715 dnl
1716 dnl     # A failsafe way of putting a dependency rule into a makefile
1717 dnl     $(DEPEND):
1718 dnl             $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1719 dnl
1720 dnl     @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1721 dnl     @ifGNUmake@ include $(DEPEND)
1722 dnl     @ifGNUmake@ endif
1723 dnl
1724 dnl Then configure.in would normally contain:
1725 dnl
1726 dnl     CHECK_GNU_MAKE()
1727 dnl     AC_OUTPUT(Makefile)
1728 dnl
1729 dnl Then perhaps to cause gnu make to override any other make, we could do
1730 dnl something like this (note that GNU make always looks for GNUmakefile first):
1731 dnl
1732 dnl     if  ! test x$_cv_gnu_make_command = x ; then
1733 dnl             mv Makefile GNUmakefile
1734 dnl             echo .DEFAULT: > Makefile ;
1735 dnl             echo \  $_cv_gnu_make_command \$@ >> Makefile;
1736 dnl     fi
1737 dnl
1738 dnl Then, if any (well almost any) other make is called, and GNU make also
1739 dnl exists, then the other make wraps the GNU make.
1740 dnl
1741 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1742 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1743 dnl
1744 dnl #### Changes for libstdc++-v3:  reformatting and linewrapping; prepending
1745 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1746 dnl #### conditional's subshell (" --version" is not a command), using a
1747 dnl #### different option to grep(1).
1748 dnl #### -pme
1749 AC_DEFUN(
1750   GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1751           _cv_gnu_make_command='' ;
1752 dnl Search all the common names for GNU make
1753           for a in "${MAKE:-make}" make gmake gnumake ; do
1754                   if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1755                   then
1756                           _cv_gnu_make_command=$a ;
1757                           break;
1758                   fi
1759           done ;
1760   ) ;
1761 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1762 dnl string, '#' otherwise
1763   if test  "x$_cv_gnu_make_command" != "x"  ; then
1764           ifGNUmake='' ;
1765   else
1766           ifGNUmake='#' ;
1767   fi
1768   AC_SUBST(ifGNUmake)
1769 ])
1770
1771 sinclude(../libtool.m4)
1772 dnl The lines below arrange for aclocal not to bring an installed
1773 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1774 dnl add a definition of LIBTOOL to Makefile.in.
1775 ifelse(,,,[AC_SUBST(LIBTOOL)
1776 AC_DEFUN([AM_PROG_LIBTOOL])
1777 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1778 AC_DEFUN([AC_PROG_LD])
1779 ])
1780