libstdc++-v3/aclocal.m4

   1 dnl aclocal.m4 generated automatically by aclocal 1.4
   2
   3 dnl Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
   4 dnl This file is free software; the Free Software Foundation
   5 dnl gives unlimited permission to copy and/or distribute it,
   6 dnl with or without modifications, as long as this notice is preserved.
   7
   8 dnl This program is distributed in the hope that it will be useful,
   9 dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
  10 dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
  11 dnl PARTICULAR PURPOSE.
  12
  13 dnl
  14 dnl Initialize configure bits.
  15 dnl
  16 dnl GLIBCPP_CONFIGURE
  17 AC_DEFUN(GLIBCPP_CONFIGURE, [
  18   dnl Default to --enable-multilib
  19   AC_ARG_ENABLE(multilib,
  20   [  --enable-multilib       build hella library versions (default)],
  21   [case "${enableval}" in
  22     yes) multilib=yes ;;
  23     no)  multilib=no ;;
  24     *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
  25    esac], [multilib=yes])dnl
  26
  27   glibcpp_basedir=$srcdir/$toprel/$1/libstdc++-v3
  28   AC_SUBST(glibcpp_basedir)
  29
  30   AM_INIT_AUTOMAKE(libstdc++, 3.0.0)
  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([$0], [AC_PROG_CXXCPP])dnl
  89 dnl Fool anybody using AC_PROG_CXX.
  90 AC_PROVIDE([AC_PROG_CXX])
  91 # Use glibcpp_CXX so that we do not cause CXX to be cached with the
  92 # flags that come in CXX while configuring libstdc++.  They're different
  93 # from those used for all other target libraries.  If CXX is set in
  94 # the environment, respect that here.
  95 glibcpp_CXX=$CXX
  96 AC_CHECK_PROGS(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
  97 AC_SUBST(glibcpp_CXX)
  98 CXX=$glibcpp_CXX
  99 test -z "$glibcpp_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, ranlib-not-found-in-path-error)
 130   AC_PROG_INSTALL
 131
 132   AM_MAINTAINER_MODE
 133
 134   # We need AC_EXEEXT to keep automake happy in cygnus mode.  However,
 135   # at least currently, we never actually build a program, so we never
 136   # need to use $(EXEEXT).  Moreover, the test for EXEEXT normally
 137   # fails, because we are probably configuring with a cross compiler
 138   # which cant create executables.  So we include AC_EXEEXT to keep
 139   # automake happy, but we dont execute it, since we dont care about
 140   # the result.
 141   if false; then
 142     # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
 143     # to nothing, so nothing would remain between `then' and `fi' if it
 144     # were not for the `:' below.
 145     :
 146     AC_EXEEXT
 147   fi
 148
 149   . [$]{glibcpp_basedir}/configure.host
 150
 151   case [$]{glibcpp_basedir} in
 152     /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
 153     *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
 154   esac
 155
 156   # This does for the target what configure.host does for the host.  In
 157   # addition to possibly modifying the same flags, it also sets up symlinks.
 158   GLIBCPP_CHECK_TARGET
 159 ])
 160
 161
 162 dnl
 163 dnl Check to see if g++ can compile this library, and if so, if any version-
 164 dnl specific precautions need to be taken.
 165 dnl
 166 dnl GLIBCPP_CHECK_COMPILER_VERSION
 167 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
 168 if test ! -f stamp-sanity-compiler; then
 169   AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
 170   AC_LANG_SAVE
 171   AC_LANG_CPLUSPLUS
 172   AC_TRY_COMPILE(, [
 173   #if __GNUC__ < 3
 174     not_ok
 175   #endif
 176   ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
 177   AC_LANG_RESTORE
 178   AC_MSG_RESULT($gpp_satisfactory)
 179   touch stamp-sanity-compiler
 180 fi
 181 ])
 182
 183
 184 dnl
 185 dnl Tests for newer compiler features, or features that are present in newer
 186 dnl compiler versions but not older compiler versions still in use, should
 187 dnl be placed here.
 188 dnl
 189 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
 190 dnl new inlining code or the new system_header pragma will die on -Werror.
 191 dnl Leave it out by default and use maint-mode to use it.
 192 dnl
 193 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
 194 dnl compiler supports it and the user has not requested debug mode.
 195 dnl
 196 dnl GLIBCPP_CHECK_COMPILER_FEATURES
 197 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
 198   # All these tests are for C++; save the language and the compiler flags.
 199   # The CXXFLAGS thing is suspicious, but based on similar bits previously
 200   # found in GLIBCPP_CONFIGURE.
 201   AC_LANG_SAVE
 202   AC_LANG_CPLUSPLUS
 203   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 204   ac_save_CXXFLAGS="$CXXFLAGS"
 205
 206   # Check for maintainer-mode bits.
 207   if test x"$USE_MAINTAINER_MODE" = xno; then
 208     WERROR=''
 209   else
 210     WERROR='-Werror'
 211   fi
 212
 213   # Check for -ffunction-sections -fdata-sections
 214   AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
 215   CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
 216   AC_TRY_COMPILE(, [int foo;
 217   ], [ac_fdsections=yes], [ac_fdsections=no])
 218   if test "$ac_test_CXXFLAGS" = set; then
 219     CXXFLAGS="$ac_save_CXXFLAGS"
 220   else
 221     # this is the suspicious part
 222     CXXFLAGS=''
 223   fi
 224   if test x"$ac_fdsections" = x"yes" &&
 225      test x"$enable_debug" = x"no"; then
 226     SECTION_FLAGS='-ffunction-sections -fdata-sections'
 227   fi
 228   AC_MSG_RESULT($ac_fdsections)
 229
 230   AC_LANG_RESTORE
 231   AC_SUBST(WERROR)
 232   AC_SUBST(SECTION_FLAGS)
 233 ])
 234
 235
 236 dnl
 237 dnl If GNU ld is in use, check to see if tricky linker opts can be used.  If
 238 dnl the native linker is in use, all variables will be defined to something
 239 dnl safe (like an empty string).
 240 dnl
 241 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
 242 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
 243 dnl
 244 dnl GLIBCPP_CHECK_LINKER_FEATURES
 245 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
 246   # If we're not using GNU ld, then there's no point in even trying these
 247   # tests.  Check for that first.  We should have already tested for gld
 248   # by now (in libtool), but require it now just to be safe...
 249   SECTION_LDFLAGS=''
 250   OPT_LDFLAGS=''
 251   AC_REQUIRE([AC_PROG_LD])
 252
 253   # Set --gc-sections.
 254   if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
 255     # GNU ld it is!  Joy and bunny rabbits!
 256
 257     # All these tests are for C++; save the language and the compiler flags.
 258     # Need to do this so that g++ won't try to link in libstdc++
 259     ac_test_CFLAGS="${CFLAGS+set}"
 260     ac_save_CFLAGS="$CFLAGS"
 261     CFLAGS='-x c++  -Wl,--gc-sections'
 262
 263     # Check for -Wl,--gc-sections
 264     # XXX This test is broken at the moment, as symbols required for
 265     # linking are now in libsupc++ (not built yet.....). In addition,
 266     # this test has cored on solaris in the past. In addition,
 267     # --gc-sections doesn't really work at the moment (keeps on discarding
 268     # used sections, first .eh_frame and now some of the glibc sections for
 269     # iconv). Bzzzzt. Thanks for playing, maybe next time.
 270     AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
 271     AC_TRY_RUN([
 272      int main(void)
 273      {
 274        try { throw 1; }
 275        catch (...) { };
 276        return 0;
 277      }
 278     ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
 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     if test "$ac_sectionLDflags" = "yes"; then
 286       SECTION_LDFLAGS='-Wl,--gc-sections'
 287     fi
 288     AC_MSG_RESULT($ac_sectionLDflags)
 289   fi
 290
 291   # Set linker optimization flags.
 292   if test x"$ac_cv_prog_gnu_ld" = x"yes" &&
 293      test x"$enable_debug" = x"no"; then
 294     OPT_LDFLAGS='-Wl,-O1'
 295   fi
 296
 297   AC_SUBST(SECTION_LDFLAGS)
 298   AC_SUBST(OPT_LDFLAGS)
 299 ])
 300
 301
 302 dnl
 303 dnl Check to see if the (math function) argument passed is
 304 dnl declared when using the c++ compiler
 305 dnl ASSUMES argument is a math function with ONE parameter
 306 dnl
 307 dnl GLIBCPP_CHECK_MATH_DECL_1
 308 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
 309   AC_MSG_CHECKING([for $1 declaration])
 310   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 311     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 312       AC_LANG_SAVE
 313       AC_LANG_CPLUSPLUS
 314       AC_TRY_COMPILE([#include <math.h>
 315                       #ifdef HAVE_IEEEFP_H
 316                       #include <ieeefp.h>
 317                       #endif
 318                      ],
 319                      [ $1(0);],
 320                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 321       AC_LANG_RESTORE
 322     ])
 323   fi
 324   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 325 ])
 326
 327 dnl
 328 dnl Check to see if the (math function) argument passed is
 329 dnl 1) declared when using the c++ compiler
 330 dnl 2) has "C" linkage
 331 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
 332 dnl
 333 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 334 dnl
 335 dnl argument 1 is name of function to check
 336 dnl
 337 dnl ASSUMES argument is a math function with ONE parameter
 338 dnl
 339 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
 340 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
 341   GLIBCPP_CHECK_MATH_DECL_1($1)
 342   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 343     AC_CHECK_FUNCS($1)
 344   else
 345     GLIBCPP_CHECK_MATH_DECL_1(_$1)
 346     if test x$glibcpp_cv_func__$1_use = x"yes"; then
 347       AC_CHECK_FUNCS(_$1)
 348     fi
 349   fi
 350 ])
 351
 352
 353 dnl
 354 dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
 355 dnl of functions at once.  It's an all-or-nothing check -- either
 356 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
 357 dnl Doing it this way saves significant configure time.
 358 AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
 359   AC_MSG_CHECKING([for $1 functions])
 360   AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
 361     AC_LANG_SAVE
 362     AC_LANG_CPLUSPLUS
 363     AC_TRY_COMPILE([#include <math.h>],
 364                    [ `for x in $3; do echo "$x (0);"; done` ],
 365                    [glibcpp_cv_func_$2_use=yes],
 366                    [glibcpp_cv_func_$2_use=no])
 367     AC_LANG_RESTORE])
 368   AC_MSG_RESULT($glibcpp_cv_func_$2_use)
 369   if test x$glibcpp_cv_func_$2_use = x"yes"; then
 370     AC_CHECK_FUNCS($3)
 371   fi
 372 ])
 373
 374 dnl
 375 dnl Check to see if the (math function) argument passed is
 376 dnl declared when using the c++ compiler
 377 dnl ASSUMES argument is a math function with TWO parameters
 378 dnl
 379 dnl GLIBCPP_CHECK_MATH_DECL_2
 380 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
 381   AC_MSG_CHECKING([for $1 declaration])
 382   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 383     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 384       AC_LANG_SAVE
 385       AC_LANG_CPLUSPLUS
 386       AC_TRY_COMPILE([#include <math.h>],
 387                      [ $1(0, 0);],
 388                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 389       AC_LANG_RESTORE
 390     ])
 391   fi
 392   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 393 ])
 394
 395 dnl
 396 dnl Check to see if the (math function) argument passed is
 397 dnl 1) declared when using the c++ compiler
 398 dnl 2) has "C" linkage
 399 dnl
 400 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 401 dnl
 402 dnl argument 1 is name of function to check
 403 dnl
 404 dnl ASSUMES argument is a math function with TWO parameters
 405 dnl
 406 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
 407 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
 408   GLIBCPP_CHECK_MATH_DECL_2($1)
 409   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 410     AC_CHECK_FUNCS($1)
 411   else
 412     GLIBCPP_CHECK_MATH_DECL_2(_$1)
 413     if test x$glibcpp_cv_func__$1_use = x"yes"; then
 414       AC_CHECK_FUNCS(_$1)
 415     fi
 416   fi
 417 ])
 418
 419
 420 dnl
 421 dnl Check to see if the (math function) argument passed is
 422 dnl declared when using the c++ compiler
 423 dnl ASSUMES argument is a math function with THREE parameters
 424 dnl
 425 dnl GLIBCPP_CHECK_MATH_DECL_3
 426 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
 427   AC_MSG_CHECKING([for $1 declaration])
 428   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 429     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 430       AC_LANG_SAVE
 431       AC_LANG_CPLUSPLUS
 432       AC_TRY_COMPILE([#include <math.h>],
 433                      [ $1(0, 0, 0);],
 434                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 435       AC_LANG_RESTORE
 436     ])
 437   fi
 438   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 439 ])
 440
 441 dnl
 442 dnl Check to see if the (math function) argument passed is
 443 dnl 1) declared when using the c++ compiler
 444 dnl 2) has "C" linkage
 445 dnl
 446 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 447 dnl
 448 dnl argument 1 is name of function to check
 449 dnl
 450 dnl ASSUMES argument is a math function with THREE parameters
 451 dnl
 452 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
 453 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
 454   GLIBCPP_CHECK_MATH_DECL_3($1)
 455   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 456     AC_CHECK_FUNCS($1)
 457   else
 458     GLIBCPP_CHECK_MATH_DECL_3(_$1)
 459     if test x$glibcpp_cv_func__$1_use = x"yes"; then
 460       AC_CHECK_FUNCS(_$1)
 461     fi
 462   fi
 463 ])
 464
 465
 466 dnl
 467 dnl Check to see if the (stdlib function) argument passed is
 468 dnl 1) declared when using the c++ compiler
 469 dnl 2) has "C" linkage
 470 dnl
 471 dnl argument 1 is name of function to check
 472 dnl
 473 dnl ASSUMES argument is a math function with TWO parameters
 474 dnl
 475 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
 476 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
 477   AC_MSG_CHECKING([for $1 declaration])
 478   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 479     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 480       AC_LANG_SAVE
 481       AC_LANG_CPLUSPLUS
 482       AC_TRY_COMPILE([#include <stdlib.h>],
 483                      [ $1(0, 0);],
 484                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 485       AC_LANG_RESTORE
 486     ])
 487   fi
 488   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 489   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 490     AC_CHECK_FUNCS($1)
 491   fi
 492 ])
 493
 494
 495 dnl
 496 dnl Because the builtins are picky picky picky about the arguments they take,
 497 dnl do an explict linkage tests here.
 498 dnl Check to see if the (math function) argument passed is
 499 dnl 1) declared when using the c++ compiler
 500 dnl 2) has "C" linkage
 501 dnl
 502 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 503 dnl
 504 dnl argument 1 is name of function to check
 505 dnl
 506 dnl ASSUMES argument is a math function with ONE parameter
 507 dnl
 508 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
 509 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
 510   AC_MSG_CHECKING([for $1 declaration])
 511   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 512     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 513       AC_LANG_SAVE
 514       AC_LANG_CPLUSPLUS
 515       AC_TRY_COMPILE([#include <math.h>],
 516                      [ $1(0);],
 517                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 518       AC_LANG_RESTORE
 519     ])
 520   fi
 521   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 522   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 523     AC_MSG_CHECKING([for $1 linkage])
 524     if test x${glibcpp_cv_func_$1_link+set} != xset; then
 525       AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
 526         AC_TRY_LINK([#include <math.h>],
 527                     [ $1(0);],
 528                     [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
 529       ])
 530     fi
 531     AC_MSG_RESULT($glibcpp_cv_func_$1_link)
 532     if test x$glibcpp_cv_func_$1_link = x"yes"; then
 533       ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 534       AC_DEFINE_UNQUOTED(${ac_tr_func})
 535     fi
 536   fi
 537 ])
 538
 539
 540 dnl
 541 dnl Check to see what builtin math functions are supported
 542 dnl
 543 dnl check for __builtin_abs
 544 dnl check for __builtin_fabsf
 545 dnl check for __builtin_fabs
 546 dnl check for __builtin_fabl
 547 dnl check for __builtin_labs
 548 dnl check for __builtin_sqrtf
 549 dnl check for __builtin_sqrtl
 550 dnl check for __builtin_fsqrt
 551 dnl check for __builtin_sinf
 552 dnl check for __builtin_sin
 553 dnl check for __builtin_sinl
 554 dnl check for __builtin_cosf
 555 dnl check for __builtin_cos
 556 dnl check for __builtin_cosl
 557 dnl
 558 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 559 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
 560   dnl Test for builtin math functions.
 561   dnl These are made in gcc/c-common.c
 562   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
 563   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
 564   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
 565   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
 566   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
 567
 568   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
 569   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
 570   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
 571
 572   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
 573   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
 574   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
 575
 576   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
 577   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
 578   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
 579
 580   dnl There is, without a doubt, a more elegant way to have these
 581   dnl names exported so that they won't be stripped out of acconfig.h by
 582   dnl autoheader. I leave this as an exercise to somebody less frustrated
 583   dnl than I.... please email the libstdc++ list if you can figure out a
 584   dnl more elegant approach (see autoconf/acgen.m4 and specifically
 585   dnl AC_CHECK_FUNC for things to steal.)
 586   dummyvar=no
 587   if test x$dummyvar = x"yes"; then
 588     AC_DEFINE(HAVE___BUILTIN_ABS)
 589     AC_DEFINE(HAVE___BUILTIN_LABS)
 590     AC_DEFINE(HAVE___BUILTIN_COS)
 591     AC_DEFINE(HAVE___BUILTIN_COSF)
 592     AC_DEFINE(HAVE___BUILTIN_COSL)
 593     AC_DEFINE(HAVE___BUILTIN_FABS)
 594     AC_DEFINE(HAVE___BUILTIN_FABSF)
 595     AC_DEFINE(HAVE___BUILTIN_FABSL)
 596     AC_DEFINE(HAVE___BUILTIN_SIN)
 597     AC_DEFINE(HAVE___BUILTIN_SINF)
 598     AC_DEFINE(HAVE___BUILTIN_SINL)
 599     AC_DEFINE(HAVE___BUILTIN_FSQRT)
 600     AC_DEFINE(HAVE___BUILTIN_SQRTF)
 601     AC_DEFINE(HAVE___BUILTIN_SQRTL)
 602   fi
 603 ])
 604
 605
 606 dnl
 607 dnl Check to see what the underlying c library
 608 dnl These checks need to do two things:
 609 dnl 1) make sure the name is declared when using the c++ compiler
 610 dnl 2) make sure the name has "C" linkage
 611 dnl This might seem like overkill but experience has shown that it's not...
 612 dnl
 613 dnl Define HAVE_STRTOLD if "strtold" is declared and links
 614 dnl Define HAVE_STRTOF if "strtof" is declared and links
 615 dnl Define HAVE_DRAND48 if "drand48" is declared and links
 616 dnl
 617 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
 618 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
 619   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 620   ac_save_CXXFLAGS="$CXXFLAGS"
 621   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 622
 623   GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
 624   AC_CHECK_FUNCS(drand48)
 625
 626   CXXFLAGS="$ac_save_CXXFLAGS"
 627 ])
 628
 629
 630 dnl
 631 dnl Check to see what the underlying c library or math library is like.
 632 dnl These checks need to do two things:
 633 dnl 1) make sure the name is declared when using the c++ compiler
 634 dnl 2) make sure the name has "C" linkage
 635 dnl This might seem like overkill but experience has shown that it's not...
 636 dnl
 637 dnl Define HAVE_CARGF etc if "cargf" is found.
 638 dnl
 639 dnl GLIBCPP_CHECK_MATH_SUPPORT
 640 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
 641   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 642   ac_save_CXXFLAGS="$CXXFLAGS"
 643   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 644
 645   dnl Check libm
 646   AC_CHECK_LIB(m, sin, libm="-lm")
 647   ac_save_LIBS="$LIBS"
 648   LIBS="$LIBS $libm"
 649
 650   dnl Check to see if certain C math functions exist.
 651   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
 652   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
 653   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
 654   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
 655   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
 656   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
 657   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
 658   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypot)
 659
 660   dnl Check to see if basic C math functions have float versions.
 661   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
 662                                           float_trig,
 663                                           acosf asinf atanf \
 664                                           cosf sinf tanf \
 665                                           coshf sinhf tanhf)
 666   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
 667                                           float_round,
 668                                           ceilf floorf)
 669   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
 670   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
 671   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
 672   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
 673   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
 674   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
 675   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf)
 676   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
 677   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
 678   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
 679   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
 680   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
 681   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
 682   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
 683   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
 684
 685   dnl Check to see if basic C math functions have long double versions.
 686   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
 687                                           long_double_trig,
 688                                           acosl asinl atanl \
 689                                           cosl sinl tanl \
 690                                           coshl sinhl tanhl)
 691   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
 692                                           long_double_round,
 693                                           ceill floorl)
 694   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
 695   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
 696   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
 697   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
 698   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
 699   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
 700   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
 701   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
 702   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl)
 703   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
 704   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
 705   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
 706   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
 707   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
 708   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
 709   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
 710   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
 711
 712   dnl Some runtimes have these functions with a preceding underscore. Please
 713   dnl keep this sync'd with the one above. And if you add any new symbol,
 714   dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
 715   dnl Check to see if certain C math functions exist.
 716
 717   dnl Check to see if basic C math functions have float versions.
 718   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
 719                                           _float_trig,
 720                                           _acosf _asinf _atanf \
 721                                           _cosf _sinf _tanf \
 722                                           _coshf _sinhf _tanhf)
 723   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
 724                                           _float_round,
 725                                           _ceilf _floorf)
 726
 727   dnl Check to see if basic C math functions have long double versions.
 728   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
 729                                           _long_double_trig,
 730                                           _acosl _asinl _atanl \
 731                                           _cosl _sinl _tanl \
 732                                           _coshl _sinhl _tanhl)
 733   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
 734                                           _long_double_round,
 735                                           _ceill _floorl)
 736
 737   LIBS="$ac_save_LIBS"
 738   CXXFLAGS="$ac_save_CXXFLAGS"
 739 ])
 740
 741
 742 dnl
 743 dnl Check to see if there is native support for complex
 744 dnl
 745 dnl Don't compile bits in math/* if native support exits.
 746 dnl
 747 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
 748 dnl
 749 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 750 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
 751   dnl Check for complex versions of math functions of platform.
 752   AC_CHECK_LIB(m, main)
 753   AC_REPLACE_MATHFUNCS(nan copysignf)
 754
 755   dnl Compile the long double complex functions only if the function
 756   dnl provides the non-complex long double functions that are needed.
 757   dnl Currently this includes copysignl, which should be
 758   dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
 759   USE_COMPLEX_LONG_DOUBLE=no
 760   if test x$ac_cv_func_copysignl = x"yes"; then
 761     USE_COMPLEX_LONG_DOUBLE=yes
 762     AC_REPLACE_MATHFUNCS(signbitl)
 763   fi
 764
 765   AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
 766 ])
 767
 768
 769 dnl Check to see what architecture and operating system we are compiling
 770 dnl for.  Also, if architecture- or OS-specific flags are required for
 771 dnl compilation, pick them up here.
 772 dnl
 773 dnl GLIBCPP_CHECK_TARGET
 774 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
 775     . [$]{glibcpp_basedir}/configure.target
 776     AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
 777     AC_MSG_RESULT(OS config directory is $os_include_dir)
 778 ])
 779
 780
 781 dnl
 782 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
 783 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled.  (This
 784 dnl must have been previously checked.)
 785 dnl
 786 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
 787 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
 788 dnl
 789 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
 790 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
 791
 792   dnl Test wchar.h for mbstate_t, which is needed for char_traits and
 793   dnl others even if wchar_t support is not on.
 794   AC_MSG_CHECKING([for mbstate_t])
 795   AC_TRY_COMPILE([#include <wchar.h>],
 796   [mbstate_t teststate;],
 797   have_mbstate_t=yes, have_mbstate_t=no)
 798   AC_MSG_RESULT($have_mbstate_t)
 799   if test x"$have_mbstate_t" = xyes; then
 800     AC_DEFINE(HAVE_MBSTATE_T)
 801   fi
 802
 803   dnl Sanity check for existence of ISO C99 headers for extended encoding.
 804   AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
 805   AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
 806
 807   dnl Only continue checking if the ISO C99 headers exist and support is on.
 808   if test x"$ac_has_wchar_h" = xyes &&
 809      test x"$ac_has_wctype_h" = xyes &&
 810      test x"$enable_c_mbchar" != xno; then
 811
 812     dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
 813     dnl numeric_limits can instantiate type_traits<wchar_t>
 814     AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
 815     AC_TRY_COMPILE([#include <wchar.h>],
 816     [int i = WCHAR_MIN; int j = WCHAR_MAX;],
 817     has_wchar_minmax=yes, has_wchar_minmax=no)
 818     AC_MSG_RESULT($has_wchar_minmax)
 819
 820     dnl Test wchar.h for WEOF, which is what we use to determine whether
 821     dnl to specialize for char_traits<wchar_t> or not.
 822     AC_MSG_CHECKING([for WEOF])
 823     AC_TRY_COMPILE([
 824       #include <wchar.h>
 825       #include <stddef.h>],
 826     [wint_t i = WEOF;],
 827     has_weof=yes, has_weof=no)
 828     AC_MSG_RESULT($has_weof)
 829
 830     dnl Tests for wide character functions used in char_traits<wchar_t>.
 831     ac_wfuncs=yes
 832     AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
 833     ac_wfuncs=no)
 834
 835     dnl Checks for names injected into std:: by the c_std headers.
 836     AC_CHECK_FUNCS(btowc wctob fgetwc fgetwc fgetws fputwc fputws fwide \
 837     fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
 838     vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
 839     mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
 840     wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
 841     wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
 842     ac_wfuncs=no)
 843
 844     AC_MSG_CHECKING([for ISO C99 wchar_t support])
 845     if test x"$has_weof" = xyes &&
 846        test x"$has_wchar_minmax" = xyes &&
 847        test x"$ac_wfuncs" = xyes; then
 848       ac_isoC99_wchar_t=yes
 849     else
 850       ac_isoC99_wchar_t=no
 851     fi
 852     AC_MSG_RESULT($ac_isoC99_wchar_t)
 853
 854     dnl Use iconv for wchar_t to char conversions. As such, check for
 855     dnl X/Open Portability Guide, version 2 features (XPG2).
 856     AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
 857     AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
 858
 859     dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
 860     AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
 861     ac_save_LIBS="$LIBS"
 862     LIBS="$LIBS $libiconv"
 863
 864     AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
 865     ac_XPG2funcs=yes, ac_XPG2funcs=no)
 866
 867     LIBS="$ac_save_LIBS"
 868
 869     AC_MSG_CHECKING([for XPG2 wchar_t support])
 870     if test x"$ac_has_iconv_h" = xyes &&
 871        test x"$ac_has_langinfo_h" = xyes &&
 872        test x"$ac_XPG2funcs" = xyes; then
 873       ac_XPG2_wchar_t=yes
 874     else
 875       ac_XPG2_wchar_t=no
 876     fi
 877     AC_MSG_RESULT($ac_XPG2_wchar_t)
 878
 879     dnl At the moment, only enable wchar_t specializations if all the
 880     dnl above support is present.
 881     AC_MSG_CHECKING([for enabled wchar_t specializations])
 882     if test x"$ac_isoC99_wchar_t" = xyes &&
 883        test x"$ac_XPG2_wchar_t" = xyes; then
 884       AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
 885       AC_MSG_RESULT("yes")
 886     else
 887       AC_MSG_RESULT("no")
 888     fi
 889   else
 890     dnl Wide characters disabled by the user.
 891     AC_MSG_WARN([wchar_t support disabled.])
 892   fi
 893 ])
 894
 895
 896 dnl
 897 dnl Check for special debugging mode; not for production use.
 898 dnl
 899 dnl GLIBCPP_ENABLE_DEBUG
 900 dnl --enable-debug sets '-ggdb3 -O0'.
 901 dnl --disable-debug sets '-g' and whatever optimization options the
 902 dnl     compiler can handle.
 903 dnl  +  --enable-maintainer-mode automatically defaults this to on.
 904 dnl  +  Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
 905 dnl  +  Usage:  GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
 906 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
 907 dnl       defaults to `no'.
 908 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
 909 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
 910 AC_ARG_ENABLE(debug,
 911 changequote(<<, >>)dnl
 912 <<  --enable-debug          extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
 913 changequote([, ])dnl
 914 [case "${enableval}" in
 915  yes) enable_debug=yes ;;
 916  no)  enable_debug=no ;;
 917  *)   AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
 918  esac],
 919 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
 920
 921 dnl Option parsed, now set things appropriately
 922 case "${enable_debug}" in
 923     yes)
 924         DEBUG_FLAGS='-O0 -ggdb3'
 925         ;;
 926     no)
 927         DEBUG_FLAGS='-g'
 928         ;;
 929 esac
 930 AC_SUBST(DEBUG_FLAGS)
 931 ])
 932
 933
 934 dnl
 935 dnl Check for "unusual" flags to pass to the compiler while building.
 936 dnl
 937 dnl GLIBCPP_ENABLE_CXX_FLAGS
 938 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
 939 dnl     experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
 940 dnl     Somehow this same set of flags must be passed when [re]building
 941 dnl     libgcc.
 942 dnl --disable-cxx-flags passes nothing.
 943 dnl  +  See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
 944 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
 945 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
 946 dnl  +  Usage:  GLIBCPP_ENABLE_CXX_FLAGS(default flags)
 947 dnl       If "default flags" is an empty string (or "none"), the effect is
 948 dnl       the same as --disable or --enable=no.
 949 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
 950 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
 951 AC_ARG_ENABLE(cxx-flags,
 952 changequote(<<, >>)dnl
 953 <<  --enable-cxx-flags=FLAGS      pass compiler FLAGS when building library;
 954                                 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
 955 changequote([, ])dnl
 956 [case "x$enableval" in
 957  xyes)
 958         AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
 959  xno|x)
 960         enable_cxx_flags='' ;;
 961  *)
 962         enable_cxx_flags="$enableval" ;;
 963  esac],
 964 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
 965
 966 dnl Thinko on my part during design.  This kludge is the workaround.
 967 if test "$enable_cxx_flags" = "none"; then
 968   enable_cxx_flags='';
 969 fi
 970
 971 dnl Run through flags (either default or command-line) and set anything
 972 dnl extra (e.g., #defines) that must accompany particular g++ options.
 973 if test -n "$enable_cxx_flags"; then
 974     for f in $enable_cxx_flags; do
 975         case "$f" in
 976             -fhonor-std)  ;;
 977             -*)  ;;
 978             *)   # and we're trying to pass /what/ exactly?
 979                  AC_MSG_ERROR([compiler flags start with a -]) ;;
 980         esac
 981     done
 982 fi
 983 EXTRA_CXX_FLAGS="$enable_cxx_flags"
 984 AC_SUBST(EXTRA_CXX_FLAGS)
 985 ])
 986
 987
 988 dnl
 989 dnl Check for which locale library to use:  gnu or generic.
 990 dnl
 991 dnl GLIBCPP_ENABLE_CLOCALE
 992 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
 993 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
 994 dnl
 995 dnl default is generic
 996 dnl
 997 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
 998   AC_MSG_CHECKING([for clocale to use])
 999   AC_ARG_ENABLE(clocale,
1000   [  --enable-clocale        enable model for target locale package.
1001   --enable-clocale=MODEL  use MODEL target-speific locale package. [default=generic]
1002   ],
1003   if test x$enable_clocale = xno; then
1004      enable_clocale=generic
1005   fi,
1006      enable_clocale=generic)
1007
1008   enable_clocale_flag=$enable_clocale
1009
1010   dnl Check if a valid locale package
1011   case x${enable_clocale_flag} in
1012     xgnu)
1013       CLOCALE_H=config/c_locale_gnu.h
1014       CLOCALE_CC=config/c_locale_gnu.cc
1015       AC_MSG_RESULT(gnu)
1016       ;;
1017     xgeneric)
1018       CLOCALE_H=config/c_locale_generic.h
1019       CLOCALE_CC=config/c_locale_generic.cc
1020       AC_MSG_RESULT(generic)
1021       ;;
1022     *)
1023       echo "$enable_clocale is an unknown locale package" 1>&2
1024       exit 1
1025       ;;
1026   esac
1027
1028   AC_SUBST(CLOCALE_H)
1029   AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1030 ])
1031
1032
1033 dnl
1034 dnl Check for which I/O library to use:  libio, or something specific.
1035 dnl
1036 dnl GLIBCPP_ENABLE_CSTDIO
1037 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1038 dnl
1039 dnl default is stdio
1040 dnl
1041 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1042   AC_MSG_CHECKING([for cstdio to use])
1043   AC_ARG_ENABLE(cstdio,
1044   [  --enable-cstdio         enable stdio for target io package.
1045   --enable-cstdio=LIB     use LIB target-speific io package. [default=stdio]
1046   ],
1047   if test x$enable_cstdio = xno; then
1048      enable_cstdio=stdio
1049   fi,
1050      enable_cstdio=stdio)
1051
1052   enable_cstdio_flag=$enable_cstdio
1053
1054   dnl Check if a valid I/O package
1055   case x${enable_cstdio_flag} in
1056     xlibio)
1057       CSTDIO_H=config/c_io_libio.h
1058       BASIC_FILE_H=config/basic_file_libio.h
1059       BASIC_FILE_CC=config/basic_file_libio.cc
1060       AC_MSG_RESULT(libio)
1061
1062       # see if we are on a system with libio native (ie, linux)
1063       AC_CHECK_HEADER(libio.h,  has_libio=yes, has_libio=no)
1064
1065       # Need to check and see what version of glibc is being used. If
1066       # it's not glibc-2.2 or higher, then we'll need to go ahead and
1067       # compile most of libio for linux systems.
1068       if test x$has_libio = x"yes"; then
1069         case "$target" in
1070           *-*-linux*)
1071               AC_MSG_CHECKING([for glibc version >= 2.2])
1072               AC_EGREP_CPP([ok], [
1073             #include <features.h>
1074               #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1075                     ok
1076               #endif
1077               ], glibc_satisfactory=yes, glibc_satisfactory=no)
1078               AC_MSG_RESULT($glibc_satisfactory)
1079             ;;
1080         esac
1081
1082         # XXX at the moment, admit defeat and force the recompilation
1083         # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1084         glibc_satisfactory=no
1085
1086         if test x$glibc_satisfactory = x"yes"; then
1087            need_libio=no
1088            need_wlibio=no
1089         else
1090            need_libio=yes
1091            # bkoz XXX need to add checks to enable this
1092            # pme XXX here's a first pass at such a check
1093            if test x$enable_c_mbchar != xno; then
1094               need_wlibio=yes
1095            else
1096               need_wlibio=no
1097            fi
1098         fi
1099
1100       else
1101          # Using libio, but <libio.h> doesn't exist on the target system. . .
1102          need_libio=yes
1103          # bkoz XXX need to add checks to enable this
1104          # pme XXX here's a first pass at such a check
1105          if test x$enable_c_mbchar != xno; then
1106              need_wlibio=yes
1107          else
1108              need_wlibio=no
1109          fi
1110       fi
1111       ;;
1112     xstdio | x | xno | xnone | xyes)
1113       # default
1114       CSTDIO_H=config/c_io_stdio.h
1115       BASIC_FILE_H=config/basic_file_stdio.h
1116       BASIC_FILE_CC=config/basic_file_stdio.cc
1117       AC_MSG_RESULT(stdio)
1118
1119       # We're not using stdio.
1120       need_libio=no
1121       need_wlibio=no
1122       ;;
1123     *)
1124       echo "$enable_cstdio is an unknown io package" 1>&2
1125       exit 1
1126       ;;
1127   esac
1128   AC_SUBST(CSTDIO_H)
1129   AC_SUBST(BASIC_FILE_H)
1130   AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1131
1132   # 2000-08-04 bkoz hack
1133   CCODECVT_C=config/c_io_libio_codecvt.c
1134   AC_SUBST(CCODECVT_C)
1135   # 2000-08-04 bkoz hack
1136
1137   AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1138                  test "$need_libio" = yes || test "$need_wlibio" = yes)
1139   AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1140   AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1141   if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1142     libio_la=../libio/libio.la
1143   else
1144     libio_la=
1145   fi
1146   AC_SUBST(libio_la)
1147 ])
1148
1149
1150 dnl
1151 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1152 dnl We must stage the required headers so that they will be installed
1153 dnl with the library (unlike libgcc, the STL implementation is provided
1154 dnl solely within headers).  Since we must not inject random user-space
1155 dnl macro names into user-provided C++ code, we first stage into <file>-in
1156 dnl and process to <file> with an output command.  The reason for a two-
1157 dnl stage process here is to correctly handle $srcdir!=$objdir without
1158 dnl having to write complex code (the sed commands to clean the macro
1159 dnl namespace are complex and fragile enough as it is).  We must also
1160 dnl add a relative path so that -I- is supported properly.
1161 dnl
1162 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1163   AC_MSG_CHECKING([for thread model used by GCC])
1164   target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1165   AC_MSG_RESULT([$target_thread_file])
1166
1167   if test $target_thread_file != single; then
1168     AC_DEFINE(HAVE_GTHR_DEFAULT)
1169     AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1170   fi
1171
1172   glibcpp_thread_h=gthr-$target_thread_file.h
1173   AC_SUBST(glibcpp_thread_h)
1174 ])
1175
1176
1177 dnl
1178 dnl Check for exception handling support.  If an explicit enable/disable
1179 dnl sjlj exceptions is given, we don't have to detect.  Otherwise the
1180 dnl target may or may not support call frame exceptions.
1181 dnl
1182 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1183 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1184 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1185 dnl
1186 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1187 dnl
1188 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1189   AC_MSG_CHECKING([for exception model to use])
1190   AC_LANG_SAVE
1191   AC_LANG_CPLUSPLUS
1192   AC_ARG_ENABLE(sjlj-exceptions,
1193   [  --enable-sjlj-exceptions  force use of builtin_setjmp for exceptions],
1194   [:],
1195   [dnl Botheration.  Now we've got to detect the exception model.
1196    dnl Link tests against libgcc.a are problematic since -- at least
1197    dnl as of this writing -- we've not been given proper -L bits for
1198    dnl single-tree newlib and libgloss.
1199    dnl
1200    dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1201    dnl conftest files before we got a change to grep them first.
1202    cat > conftest.$ac_ext << EOF
1203 [#]line __oline__ "configure"
1204 struct S { ~S(); };
1205 void bar();
1206 void foo()
1207 {
1208   S s;
1209   bar();
1210 }
1211 EOF
1212    old_CXXFLAGS="$CXXFLAGS"
1213    CXXFLAGS=-S
1214    if AC_TRY_EVAL(ac_compile); then
1215      if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1216        enable_sjlj_exceptions=yes
1217      elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1218        enable_sjlj_exceptions=no
1219      fi
1220    fi
1221    CXXFLAGS="$old_CXXFLAGS"
1222    rm -f conftest*])
1223    if test x$enable_sjlj_exceptions = xyes; then
1224      AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1225         [Define if the compiler is configured for setjmp/longjmp exceptions.])
1226      ac_exception_model_name=sjlj
1227    elif test x$enable_sjlj_exceptions = xno; then
1228      ac_exception_model_name="call frame"
1229    else
1230      AC_MSG_ERROR([unable to detect exception model])
1231    fi
1232    AC_LANG_RESTORE
1233    AC_MSG_RESULT($ac_exception_model_name)
1234 ])
1235
1236
1237 dnl
1238 dnl Check for ISO/IEC 9899:1999 "C99" support.
1239 dnl
1240 dnl GLIBCPP_ENABLE_C99
1241 dnl --enable-c99 defines _GLIBCPP_USE_C99
1242 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1243 dnl  +  Usage:  GLIBCPP_ENABLE_C99[(DEFAULT)]
1244 dnl       Where DEFAULT is either `yes' or `no'.  If omitted, it
1245 dnl       defaults to `no'.
1246 dnl  +  If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1247 dnl
1248 dnl GLIBCPP_ENABLE_C99
1249 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1250   define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1251
1252   AC_ARG_ENABLE(c99,
1253   changequote(<<, >>)dnl
1254   <<--enable-c99      turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1255   changequote([, ])dnl
1256   [case "$enableval" in
1257    yes) enable_c99=yes ;;
1258    no)  enable_c99=no ;;
1259    *)   AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1260    esac],
1261   enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1262
1263   AC_LANG_SAVE
1264   AC_LANG_CPLUSPLUS
1265
1266   # Check for the existence of <math.h> functions used if C99 is enabled.
1267   ac_c99_math=yes;
1268   AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1269   AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1270   AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1271   AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1272   AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1273   AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1274   AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1275   AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1276   AC_TRY_COMPILE([#include <math.h>],
1277                  [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1278   AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1279   AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1280   AC_TRY_COMPILE([#include <math.h>],
1281                  [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1282   AC_TRY_COMPILE([#include <math.h>],
1283                  [isunordered(0.0,0.0);],, [ac_c99_math=no])
1284   AC_MSG_RESULT($ac_c99_math)
1285
1286   # Check for the existence in <stdio.h> of vscanf, et. al.
1287   ac_c99_stdio=yes;
1288   AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1289   AC_TRY_COMPILE([#include <stdio.h>],
1290                  [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1291   AC_TRY_COMPILE([#include <stdio.h>
1292                   #include <stdarg.h>
1293                   void foo(char* fmt, ...)
1294                   {va_list args; va_start(args, fmt);
1295                   vfscanf(stderr, "%i", args);}],
1296                   [],, [ac_c99_stdio=no])
1297   AC_TRY_COMPILE([#include <stdio.h>
1298                   #include <stdarg.h>
1299                   void foo(char* fmt, ...)
1300                   {va_list args; va_start(args, fmt);
1301                   vscanf("%i", args);}],
1302                   [],, [ac_c99_stdio=no])
1303   AC_TRY_COMPILE([#include <stdio.h>
1304                   #include <stdarg.h>
1305                   void foo(char* fmt, ...)
1306                   {va_list args; va_start(args, fmt);
1307                   vsnprintf(fmt, 0, "%i", args);}],
1308                   [],, [ac_c99_stdio=no])
1309   AC_TRY_COMPILE([#include <stdio.h>
1310                   #include <stdarg.h>
1311                   void foo(char* fmt, ...)
1312                   {va_list args; va_start(args, fmt);
1313                   vsscanf(fmt, "%i", args);}],
1314                   [],, [ac_c99_stdio=no])
1315   AC_MSG_RESULT($ac_c99_stdio)
1316
1317   # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1318   ac_c99_stdlib=yes;
1319   AC_MSG_CHECKING([for lldiv_t declaration])
1320   AC_CACHE_VAL(ac_c99_lldiv_t, [
1321   AC_TRY_COMPILE([#include <stdlib.h>],
1322                    [ lldiv_t mydivt;],
1323                    [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1324   ])
1325   AC_MSG_RESULT($ac_c99_lldiv_t)
1326
1327   AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1328   AC_TRY_COMPILE([#include <stdlib.h>],
1329                  [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1330   AC_TRY_COMPILE([#include <stdlib.h>],
1331                  [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1332   AC_TRY_COMPILE([#include <stdlib.h>],
1333                  [char* tmp; strtoll("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1334   AC_TRY_COMPILE([#include <stdlib.h>],
1335                  [char* tmp; strtoull("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1336   AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1337   AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1338   AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1339   AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1340   if test x"$ac_c99_lldiv_t" = x"no"; then
1341     ac_c99_stdlib=no;
1342   fi;
1343   AC_MSG_RESULT($ac_c99_stdlib)
1344
1345   # Check for the existence of <wchar.h> functions used if C99 is enabled.
1346   # XXX the wchar.h checks should be rolled into the general C99 bits.
1347   ac_c99_wchar=yes;
1348   AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1349   AC_TRY_COMPILE([#include <wchar.h>],
1350                  [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1351   AC_TRY_COMPILE([#include <wchar.h>],
1352                  [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1353   AC_TRY_COMPILE([#include <wchar.h>],
1354                  [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1355   AC_MSG_RESULT($ac_c99_wchar)
1356
1357   AC_MSG_CHECKING([for enabled ISO C99 support])
1358   if test x"$ac_c99_math" = x"no" ||
1359      test x"$ac_c99_stdio" = x"no" ||
1360      test x"$ac_c99_stdlib" = x"no" ||
1361      test x"$ac_c99_wchar" = x"no"; then
1362     enable_c99=no;
1363   fi;
1364   AC_MSG_RESULT($enable_c99)
1365
1366   # Option parsed, now set things appropriately
1367   if test x"$enable_c99" = x"yes"; then
1368     AC_DEFINE(_GLIBCPP_USE_C99)
1369   fi
1370
1371   AC_LANG_RESTORE
1372 ])
1373
1374
1375 dnl
1376 dnl Check for template specializations for the 'long long' type extension.
1377 dnl NB: Must check for C99 support before calling _GLIBCPP_ENABLE_LONG_LONG
1378 dnl
1379 dnl GLIBCPP_ENABLE_LONG_LONG
1380 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1381 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1382 dnl  +  Usage:  GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1383 dnl       Where DEFAULT is either `yes' or `no'.  If omitted, it
1384 dnl       defaults to `no'.
1385 dnl  +  If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1386 dnl
1387 dnl GLIBCPP_ENABLE_LONG_LONG
1388 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1389   define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1390
1391   AC_ARG_ENABLE(long-long,
1392   changequote(<<, >>)dnl
1393   <<--enable-long-long      turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1394   changequote([, ])dnl
1395   [case "$enableval" in
1396    yes) enable_long_long=yes ;;
1397    no)  enable_long_long=no ;;
1398    *)   AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1399    esac],
1400   enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1401
1402   # iostreams require strtoll, strtoull to compile. If the
1403   # GLIBCPP_ENABLE_C99 tests found these, and if C99 support is enabled,
1404   # go ahead and allow long long to be used.
1405   if test x"$enable_c99" = x"no"; then
1406     enable_long_long=no;
1407   fi
1408
1409   # Option parsed, now set things appropriately
1410   AC_MSG_CHECKING([for enabled long long support])
1411   if test x"$enable_long_long" = xyes; then
1412     AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1413   fi
1414   AC_MSG_RESULT($enable_long_long)
1415 ])
1416
1417
1418 dnl
1419 dnl Check for what kind of C headers to use.
1420 dnl
1421 dnl GLIBCPP_ENABLE_CHEADERS
1422 dnl --enable-cheaders= [does stuff].
1423 dnl --disable-cheaders [does not do anything, really].
1424 dnl  +  This will eventually need to be 'c_shadow' by default.
1425 dnl  +  Usage:  GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1426 dnl       Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1427 dnl       If ommitted, it defaults to `c_std'.
1428 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1429 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1430 AC_MSG_CHECKING([for c header strategy to use])
1431 AC_ARG_ENABLE(cheaders,
1432 changequote(<<, >>)dnl
1433 <<  --enable-cheaders       construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1434 changequote([, ])
1435   [case "$enableval" in
1436    c)
1437         enable_cheaders=c
1438         ;;
1439    c_std)
1440         enable_cheaders=c_std
1441         ;;
1442    c_shadow)
1443         enable_cheaders=c_shadow
1444         ;;
1445    *)   AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1446         ;;
1447   esac],
1448   enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1449   AC_MSG_RESULT($enable_cheaders)
1450
1451   dnl Option parsed, now set things appropriately
1452   case "$enable_cheaders" in
1453     c_shadow)
1454         CSHADOW_FLAGS="-fno-builtin"
1455         C_INCLUDE_DIR='${glibcpp_srcdir}/include/c_shadow'
1456         AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1457         ;;
1458     c_std)
1459         CSHADOW_FLAGS=""
1460         C_INCLUDE_DIR='${glibcpp_srcdir}/include/c_std'
1461         ;;
1462     c)
1463         CSHADOW_FLAGS=""
1464         C_INCLUDE_DIR='${glibcpp_srcdir}/include/c'
1465         ;;
1466   esac
1467
1468   AC_SUBST(CSHADOW_FLAGS)
1469   AC_SUBST(C_INCLUDE_DIR)
1470   AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1471 ])
1472
1473
1474 dnl
1475 dnl Check for wide character support.  Has the same effect as the option
1476 dnl in gcc's configure, but in a form that autoconf can mess with.
1477 dnl
1478 dnl GLIBCPP_ENABLE_C_MBCHAR
1479 dnl --enable-c-mbchar requests all the wchar_t stuff.
1480 dnl --disable-c-mbchar doesn't.
1481 dnl  +  Usage:  GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1482 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1483 dnl       defaults to `no'.
1484 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1485 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1486 AC_ARG_ENABLE(c-mbchar,
1487 changequote(<<, >>)dnl
1488 <<  --enable-c-mbchar       enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1489 changequote([, ])dnl
1490 [case "$enableval" in
1491  yes) enable_c_mbchar=yes ;;
1492  no)  enable_c_mbchar=no ;;
1493  *)   AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1494  esac],
1495 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1496 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1497 ])
1498
1499
1500 dnl
1501 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1502 dnl
1503 dnl TOPLEVEL_INCLUDES
1504 dnl LIBMATH_INCLUDES
1505 dnl LIBSUPCXX_INCLUDES
1506 dnl LIBIO_INCLUDES
1507 dnl CSHADOW_INCLUDES
1508 dnl
1509 dnl GLIBCPP_EXPORT_INCLUDES
1510 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1511   # Root level of the build directory include sources.
1512   GLIBCPP_INCLUDES="-I${glibcpp_builddir}/include/${target_alias} -I${glibcpp_builddir}/include"
1513
1514   # Passed down for canadian crosses.
1515   if test x"$CANADIAN" = xyes; then
1516     TOPLEVEL_INCLUDES='-I$(includedir)'
1517   fi
1518
1519   LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1520
1521   LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1522
1523   if test x"$need_libio" = xyes; then
1524     LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1525     AC_SUBST(LIBIO_INCLUDES)
1526   fi
1527
1528   # Now, export this to all the little Makefiles....
1529   AC_SUBST(GLIBCPP_INCLUDES)
1530   AC_SUBST(TOPLEVEL_INCLUDES)
1531   AC_SUBST(LIBMATH_INCLUDES)
1532   AC_SUBST(LIBSUPCXX_INCLUDES)
1533 ])
1534
1535
1536 dnl
1537 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1538 dnl
1539 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1540   # Optimization flags that are probably a good idea for thrill-seekers. Just
1541   # uncomment the lines below and make, everything else is ready to go...
1542   # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1543   OPTIMIZE_CXXFLAGS=
1544   AC_SUBST(OPTIMIZE_CXXFLAGS)
1545
1546   WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1547   AC_SUBST(WARN_FLAGS)
1548 ])
1549
1550 dnl
1551 dnl  GLIBCPP_EXPORT_INSTALL_INFO
1552 dnl  calculates gxx_install_dir
1553 dnl  exports glibcpp_toolexecdir
1554 dnl  exports glibcpp_toolexeclibdir
1555 dnl  exports glibcpp_builddir
1556 dnl  exports glibcpp_srcdir
1557 dnl  exports glibcpp_prefixdir
1558 dnl
1559 dnl Assumes cross_compiling bits already done, and with_cross_host in
1560 dnl particular
1561 dnl
1562 dnl GLIBCPP_EXPORT_INSTALL_INFO
1563 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1564
1565 glibcpp_toolexecdir=no
1566 glibcpp_toolexeclibdir=no
1567
1568 # Export build and source directories.
1569 # These need to be absolute paths, yet at the same time need to
1570 # canonicalize only relative paths, because then amd will not unmount
1571 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
1572 glibcpp_builddir=`pwd`
1573 case $srcdir in
1574 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
1575 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
1576 esac
1577 glibcpp_prefixdir=${prefix}
1578
1579 AC_MSG_CHECKING([for interface version number])
1580 libstdcxx_interface=$INTERFACE
1581 AC_MSG_RESULT($libstdcxx_interface)
1582
1583 # Process the option --with-gxx-include-dir=<path to include-files directory>
1584 AC_MSG_CHECKING([for --with-gxx-include-dir])
1585 AC_ARG_WITH(gxx-include-dir,
1586 [  --with-gxx-include-dir  the installation directory for include files],
1587 [case "${withval}" in
1588   yes)
1589     AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1590     gxx_include_dir=no
1591     ;;
1592   no)
1593     gxx_include_dir=no
1594     ;;
1595   *)
1596     gxx_include_dir=${withval}
1597     ;;
1598 esac], [gxx_include_dir=no])
1599 AC_MSG_RESULT($gxx_include_dir)
1600
1601 # Process the option "--enable-version-specific-runtime-libs"
1602 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1603 AC_ARG_ENABLE(version-specific-runtime-libs,
1604 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
1605 [  version_specific_libs=yes
1606 # Need the gcc compiler version to know where to install libraries
1607 # and header files if --enable-version-specific-runtime-libs option
1608 # is selected.
1609 changequote(,)dnl
1610 gcc_version_trigger=${srcdir}/../gcc/version.c
1611 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1612 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1613 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1614 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1615 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
1616 changequote([,])dnl
1617 ],version_specific_libs=no)
1618 AC_MSG_RESULT($version_specific_libs)
1619
1620 # Default case for install directory for include files.
1621 if test x"$version_specific_libs" = x"no" \
1622    && test x"$gxx_include_dir" = x"no"; then
1623   gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1624 fi
1625
1626 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1627 # Install a library built with a cross compiler in tooldir, not libdir.
1628 if test x"$glibcpp_toolexecdir" = x"no"; then
1629   if test -n "$with_cross_host" &&
1630      test x"$with_cross_host" != x"no"; then
1631     glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1632     glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1633   else
1634     glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1635     glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1636   fi
1637 fi
1638
1639 AC_MSG_CHECKING([for install location])
1640 AC_MSG_RESULT($gxx_include_dir)
1641
1642 AC_SUBST(glibcpp_builddir)
1643 AC_SUBST(glibcpp_srcdir)
1644 AC_SUBST(glibcpp_prefixdir)
1645 AC_SUBST(gxx_include_dir)
1646 AC_SUBST(glibcpp_toolexecdir)
1647 AC_SUBST(glibcpp_toolexeclibdir)
1648 ])
1649
1650
1651 # Check whether LC_MESSAGES is available in <locale.h>.
1652 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1653 #
1654 # This file file be copied and used freely without restrictions.  It can
1655 # be used in projects which are not available under the GNU Public License
1656 # but which still want to provide support for the GNU gettext functionality.
1657 # Please note that the actual code is *not* freely available.
1658
1659 # serial 1
1660
1661 AC_DEFUN(AC_LC_MESSAGES, [
1662   AC_CHECK_HEADER(locale.h, [
1663     AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1664       [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1665        ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1666     if test $ac_cv_val_LC_MESSAGES = yes; then
1667       AC_DEFINE(HAVE_LC_MESSAGES)
1668     fi
1669   ])
1670 ])
1671
1672
1673 # Check for functions in math library.
1674 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1675 #
1676 # This file can be copied and used freely without restrictions.  It can
1677 # be used in projects which are not available under the GNU Public License
1678 # but which still want to provide support for the GNU gettext functionality.
1679 # Please note that the actual code is *not* freely available.
1680
1681 # serial 1
1682
1683 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1684 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1685 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1686 AC_SUBST(LIBMATHOBJS)dnl
1687 ])
1688
1689
1690 # Check for string functions.
1691 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1692 #
1693 # This file can be copied and used freely without restrictions.  It can
1694 # be used in projects which are not available under the GNU Public License
1695 # but which still want to provide support for the GNU gettext functionality.
1696 # Please note that the actual code is *not* freely available.
1697
1698 # serial 1
1699
1700 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1701 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1702 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1703 AC_SUBST(LIBSTRINGOBJS)dnl
1704 ])
1705
1706
1707 dnl This macro searches for a GNU version of make.  If a match is found, the
1708 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1709 dnl set to "#". This is useful for  including a special features in a Makefile,
1710 dnl which cannot be handled by other versions of make.  The variable
1711 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1712 dnl the empty string otherwise.
1713 dnl
1714 dnl Here is an example of its use:
1715 dnl
1716 dnl Makefile.in might contain:
1717 dnl
1718 dnl     # A failsafe way of putting a dependency rule into a makefile
1719 dnl     $(DEPEND):
1720 dnl             $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1721 dnl
1722 dnl     @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1723 dnl     @ifGNUmake@ include $(DEPEND)
1724 dnl     @ifGNUmake@ endif
1725 dnl
1726 dnl Then configure.in would normally contain:
1727 dnl
1728 dnl     CHECK_GNU_MAKE()
1729 dnl     AC_OUTPUT(Makefile)
1730 dnl
1731 dnl Then perhaps to cause gnu make to override any other make, we could do
1732 dnl something like this (note that GNU make always looks for GNUmakefile first):
1733 dnl
1734 dnl     if  ! test x$_cv_gnu_make_command = x ; then
1735 dnl             mv Makefile GNUmakefile
1736 dnl             echo .DEFAULT: > Makefile ;
1737 dnl             echo \  $_cv_gnu_make_command \$@ >> Makefile;
1738 dnl     fi
1739 dnl
1740 dnl Then, if any (well almost any) other make is called, and GNU make also
1741 dnl exists, then the other make wraps the GNU make.
1742 dnl
1743 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1744 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1745 dnl
1746 dnl #### Changes for libstdc++-v3:  reformatting and linewrapping; prepending
1747 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1748 dnl #### conditional's subshell (" --version" is not a command), using a
1749 dnl #### different option to grep(1).
1750 dnl #### -pme
1751 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1752 dnl #### ${MAKE:-make}).
1753 dnl #### -msokolov
1754 AC_DEFUN(
1755   GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1756           _cv_gnu_make_command='' ;
1757 dnl Search all the common names for GNU make
1758           for a in "${MAKE-make}" make gmake gnumake ; do
1759                   if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1760                   then
1761                           _cv_gnu_make_command=$a ;
1762                           break;
1763                   fi
1764           done ;
1765   ) ;
1766 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1767 dnl string, '#' otherwise
1768   if test  "x$_cv_gnu_make_command" != "x"  ; then
1769           ifGNUmake='' ;
1770   else
1771           ifGNUmake='#' ;
1772   fi
1773   AC_SUBST(ifGNUmake)
1774 ])
1775
1776 sinclude(../libtool.m4)
1777 dnl The lines below arrange for aclocal not to bring an installed
1778 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1779 dnl add a definition of LIBTOOL to Makefile.in.
1780 ifelse(,,,[AC_SUBST(LIBTOOL)
1781 AC_DEFUN([AM_PROG_LIBTOOL])
1782 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1783 AC_DEFUN([AC_PROG_LD])
1784 ])
1785
1786
1787
1788 # Do all the work for Automake.  This macro actually does too much --
1789 # some checks are only needed if your package does certain things.
1790 # But this isn't really a big deal.
1791
1792 # serial 1
1793
1794 dnl Usage:
1795 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1796
1797 AC_DEFUN(AM_INIT_AUTOMAKE,
1798 [AC_REQUIRE([AC_PROG_INSTALL])
1799 PACKAGE=[$1]
1800 AC_SUBST(PACKAGE)
1801 VERSION=[$2]
1802 AC_SUBST(VERSION)
1803 dnl test to see if srcdir already configured
1804 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1805   AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1806 fi
1807 ifelse([$3],,
1808 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1809 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1810 AC_REQUIRE([AM_SANITY_CHECK])
1811 AC_REQUIRE([AC_ARG_PROGRAM])
1812 dnl FIXME This is truly gross.
1813 missing_dir=`cd $ac_aux_dir && pwd`
1814 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1815 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1816 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1817 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1818 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1819 AC_REQUIRE([AC_PROG_MAKE_SET])])
1820
1821 #
1822 # Check to make sure that the build environment is sane.
1823 #
1824
1825 AC_DEFUN(AM_SANITY_CHECK,
1826 [AC_MSG_CHECKING([whether build environment is sane])
1827 # Just in case
1828 sleep 1
1829 echo timestamp > conftestfile
1830 # Do `set' in a subshell so we don't clobber the current shell's
1831 # arguments.  Must try -L first in case configure is actually a
1832 # symlink; some systems play weird games with the mod time of symlinks
1833 # (eg FreeBSD returns the mod time of the symlink's containing
1834 # directory).
1835 if (
1836    set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1837    if test "[$]*" = "X"; then
1838       # -L didn't work.
1839       set X `ls -t $srcdir/configure conftestfile`
1840    fi
1841    if test "[$]*" != "X $srcdir/configure conftestfile" \
1842       && test "[$]*" != "X conftestfile $srcdir/configure"; then
1843
1844       # If neither matched, then we have a broken ls.  This can happen
1845       # if, for instance, CONFIG_SHELL is bash and it inherits a
1846       # broken ls alias from the environment.  This has actually
1847       # happened.  Such a system could not be considered "sane".
1848       AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
1849 alias in your environment])
1850    fi
1851
1852    test "[$]2" = conftestfile
1853    )
1854 then
1855    # Ok.
1856    :
1857 else
1858    AC_MSG_ERROR([newly created file is older than distributed files!
1859 Check your system clock])
1860 fi
1861 rm -f conftest*
1862 AC_MSG_RESULT(yes)])
1863
1864 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1865 dnl The program must properly implement --version.
1866 AC_DEFUN(AM_MISSING_PROG,
1867 [AC_MSG_CHECKING(for working $2)
1868 # Run test in a subshell; some versions of sh will print an error if
1869 # an executable is not found, even if stderr is redirected.
1870 # Redirect stdin to placate older versions of autoconf.  Sigh.
1871 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1872    $1=$2
1873    AC_MSG_RESULT(found)
1874 else
1875    $1="$3/missing $2"
1876    AC_MSG_RESULT(missing)
1877 fi
1878 AC_SUBST($1)])
1879
1880 # Add --enable-maintainer-mode option to configure.
1881 # From Jim Meyering
1882
1883 # serial 1
1884
1885 AC_DEFUN(AM_MAINTAINER_MODE,
1886 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1887   dnl maintainer-mode is disabled by default
1888   AC_ARG_ENABLE(maintainer-mode,
1889 [  --enable-maintainer-mode enable make rules and dependencies not useful
1890                           (and sometimes confusing) to the casual installer],
1891       USE_MAINTAINER_MODE=$enableval,
1892       USE_MAINTAINER_MODE=no)
1893   AC_MSG_RESULT($USE_MAINTAINER_MODE)
1894   AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1895   MAINT=$MAINTAINER_MODE_TRUE
1896   AC_SUBST(MAINT)dnl
1897 ]
1898 )
1899
1900 # Define a conditional.
1901
1902 AC_DEFUN(AM_CONDITIONAL,
1903 [AC_SUBST($1_TRUE)
1904 AC_SUBST($1_FALSE)
1905 if $2; then
1906   $1_TRUE=
1907   $1_FALSE='#'
1908 else
1909   $1_TRUE='#'
1910   $1_FALSE=
1911 fi])
1912
1913 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1914
1915 AC_DEFUN(AM_CONFIG_HEADER,
1916 [AC_PREREQ([2.12])
1917 AC_CONFIG_HEADER([$1])
1918 dnl When config.status generates a header, we must update the stamp-h file.
1919 dnl This file resides in the same directory as the config header
1920 dnl that is generated.  We must strip everything past the first ":",
1921 dnl and everything past the last "/".
1922 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1923 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1924 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1925 <<am_indx=1
1926 for am_file in <<$1>>; do
1927   case " <<$>>CONFIG_HEADERS " in
1928   *" <<$>>am_file "*<<)>>
1929     echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1930     ;;
1931   esac
1932   am_indx=`expr "<<$>>am_indx" + 1`
1933 done<<>>dnl>>)
1934 changequote([,]))])
1935