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 Define OPTLEVEL='-O2' if new inlining code present.
  17 dnl
  18 dnl GLIBCPP_CONFIGURE
  19 AC_DEFUN(GLIBCPP_CONFIGURE, [
  20   dnl Default to --enable-multilib
  21   AC_ARG_ENABLE(multilib,
  22   [  --enable-multilib       build hella library versions (default)],
  23   [case "${enableval}" in
  24     yes) multilib=yes ;;
  25     no)  multilib=no ;;
  26     *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
  27    esac], [multilib=yes])dnl
  28
  29   dnl We may get other options which we dont document:
  30   dnl --with-target-subdir, --with-multisrctop, --with-multisubdir
  31   if test "[$]{srcdir}" = "."; then
  32     if test "[$]{with_target_subdir}" != "."; then
  33       glibcpp_basedir="[$]{srcdir}/[$]{with_multisrctop}../$1"
  34     else
  35       glibcpp_basedir="[$]{srcdir}/[$]{with_multisrctop}$1"
  36     fi
  37   else
  38     glibcpp_basedir="[$]{srcdir}/$1"
  39   fi
  40   AC_SUBST(glibcpp_basedir)
  41
  42   AM_INIT_AUTOMAKE(libstdc++, 2.90.8)
  43
  44   # Never versions of autoconf add an underscore to these functions.
  45   # Prevent future problems ...
  46   ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
  47   ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
  48   ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
  49   ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
  50
  51 #  AC_PROG_CC
  52
  53 # FIXME: We temporarily define our own version of AC_PROG_CC.  This is
  54 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
  55 # are probably using a cross compiler, which will not be able to fully
  56 # link an executable.  This should really be fixed in autoconf
  57 # itself.
  58
  59 AC_DEFUN(LIB_AC_PROG_CC,
  60 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  61 dnl Fool anybody using AC_PROG_CC.
  62 AC_PROVIDE([AC_PROG_CC])
  63 AC_CHECK_PROG(CC, gcc, gcc)
  64 if test -z "$CC"; then
  65   AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  66   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
  67 fi
  68
  69 AC_PROG_CC_GNU
  70
  71 if test $ac_cv_prog_gcc = yes; then
  72   GCC=yes
  73 dnl Check whether -g works, even if CFLAGS is set, in case the package
  74 dnl plays around with CFLAGS (such as to build both debugging and
  75 dnl normal versions of a library), tasteless as that idea is.
  76   ac_test_CFLAGS="${CFLAGS+set}"
  77   ac_save_CFLAGS="$CFLAGS"
  78   CFLAGS=
  79   AC_PROG_CC_G
  80   if test "$ac_test_CFLAGS" = set; then
  81     CFLAGS="$ac_save_CFLAGS"
  82   elif test $ac_cv_prog_cc_g = yes; then
  83     CFLAGS="-g -O2"
  84   else
  85     CFLAGS="-O2"
  86   fi
  87 else
  88   GCC=
  89   test "${CFLAGS+set}" = set || CFLAGS="-g"
  90 fi
  91 ])
  92
  93 LIB_AC_PROG_CC
  94
  95 # Can't just call these here as g++ requires libstc++ to be built....
  96 #  AC_PROG_CXX
  97
  98 # Likewise for AC_PROG_CXX.
  99 AC_DEFUN(LIB_AC_PROG_CXX,
 100 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
 101 dnl Fool anybody using AC_PROG_CXX.
 102 AC_PROVIDE([AC_PROG_CXX])
 103 # Use CXX_libstdcxx so that we do not cause CXX to be cached with the
 104 # flags that come in CXX while configuring libstdc++.  They're different
 105 # from those used for all other target libraries.  If CXX is set in
 106 # the environment, respect that here.
 107 CXX_libstdcxx=$CXX
 108 AC_CHECK_PROGS(CXX_libstdcxx, $CCC c++ g++ gcc CC cxx cc++, gcc)
 109 CXX=$CXX_libstdcxx
 110 AC_SUBST(CXX)
 111 test -z "$CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
 112
 113 AC_PROG_CXX_GNU
 114
 115 if test $ac_cv_prog_gxx = yes; then
 116   GXX=yes
 117 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
 118 dnl plays around with CXXFLAGS (such as to build both debugging and
 119 dnl normal versions of a library), tasteless as that idea is.
 120   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 121   ac_save_CXXFLAGS="$CXXFLAGS"
 122   CXXFLAGS=
 123   AC_PROG_CXX_G
 124   if test "$ac_test_CXXFLAGS" = set; then
 125     CXXFLAGS="$ac_save_CXXFLAGS"
 126   elif test $ac_cv_prog_cxx_g = yes; then
 127     CXXFLAGS="-g -O2"
 128   else
 129     CXXFLAGS="-O2"
 130   fi
 131 else
 132   GXX=
 133   test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
 134 fi
 135 ])
 136
 137 LIB_AC_PROG_CXX
 138
 139   AC_CHECK_TOOL(AS, as)
 140   AC_CHECK_TOOL(AR, ar)
 141   AC_CHECK_TOOL(RANLIB, ranlib, :)
 142
 143   AC_PROG_INSTALL
 144
 145   AM_MAINTAINER_MODE
 146
 147   # We need AC_EXEEXT to keep automake happy in cygnus mode.  However,
 148   # at least currently, we never actually build a program, so we never
 149   # need to use $(EXEEXT).  Moreover, the test for EXEEXT normally
 150   # fails, because we are probably configuring with a cross compiler
 151   # which cant create executables.  So we include AC_EXEEXT to keep
 152   # automake happy, but we dont execute it, since we dont care about
 153   # the result.
 154   if false; then
 155     AC_EXEEXT
 156   fi
 157
 158   # configure.host sets the following important variables
 159   #        glibcpp_cflags    - host specific C compiler flags
 160   #        glibcpp_cxxflags  - host specific C++ compiler flags
 161   glibcpp_cflags=
 162   glibcpp_cxxflags=
 163
 164   . [$]{glibcpp_basedir}/configure.host
 165
 166   case [$]{glibcpp_basedir} in
 167     /* | [A-Za-z]:[/\\]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
 168     *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
 169   esac
 170
 171   # This does for the target what configure.host does for the host.  In
 172   # addition to modifying the same flags, it also sets up symlinks.
 173   GLIBCPP_CHECK_TARGET
 174
 175   GLIBCPP_CFLAGS="[$]{glibcpp_cflags}"
 176   GLIBCPP_CXXFLAGS="[$]{glibcpp_cxxflags}"
 177   AC_SUBST(GLIBCPP_CFLAGS)
 178   AC_SUBST(GLIBCPP_CXXFLAGS)
 179 ])
 180
 181
 182 dnl
 183 dnl Check to see if g++ can compile this library, and if so, if any version-
 184 dnl specific precautions need to be taken.
 185 dnl
 186 dnl GLIBCPP_CHECK_COMPILER_VERSION
 187 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
 188   # Sanity check that g++ is capable of dealing with v-3.
 189   AC_MSG_CHECKING([for g++ that will successfully compile this code])
 190   AC_EGREP_CPP([ok], [
 191   #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
 192     ok
 193   #endif
 194   ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to gcc-2.95 or above]))
 195   AC_MSG_RESULT($gpp_satisfactory)
 196 ])
 197
 198
 199 dnl
 200 dnl Test for newer compiler features, or features that are present in newer
 201 dnl compiler version but not older compiler versions should be placed
 202 dnl here.
 203 dnl
 204 dnl Define WFMT_FLAGS='-fdiagnostics-show-location=once' if possible
 205 dnl
 206 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
 207 dnl new inlining code or the new system_header pragma will die on -Werror.
 208 dnl Leave it out by default and use maint-mode to use it.
 209 dnl
 210 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
 211 dnl compiler supports it.
 212 dnl GLIBCPP_CHECK_COMPILER_FEATURES
 213 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
 214   # All these tests are for C++; save the language and the compiler flags.
 215   # The CXXFLAGS thing is suspicious, but based on similar bits
 216   # found in GLIBCPP_CONFIGURE.
 217   AC_LANG_SAVE
 218   AC_LANG_CPLUSPLUS
 219   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 220   ac_save_CXXFLAGS="$CXXFLAGS"
 221
 222   # Check for maintainer-mode bits.
 223   if test x"$USE_MAINTAINER_MODE" = xno; then
 224     WERROR=''
 225   else
 226     WERROR='-Werror'
 227   fi
 228
 229   # Check for more sophisticated diagnostic control.
 230   AC_MSG_CHECKING([for g++ that supports -fdiagnostics-show-location=once])
 231   CXXFLAGS='-Werror -fdiagnostics-show-location=once'
 232   AC_TRY_COMPILE(, [int foo;
 233   ], [ac_gabydiags=yes], [ac_gabydiags=no])
 234   if test "$ac_test_CXXFLAGS" = set; then
 235     CXXFLAGS="$ac_save_CXXFLAGS"
 236   else
 237     # this is the suspicious part
 238     CXXFLAGS=''
 239   fi
 240   if test "$ac_gabydiags" = "yes"; then
 241     WFMT_FLAGS='-fdiagnostics-show-location=once'
 242   fi
 243   AC_MSG_RESULT($ac_gabydiags)
 244
 245   # Check for -ffunction-sections -fdata-sections
 246   AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
 247   CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
 248   AC_TRY_COMPILE(, [int foo;
 249   ], [ac_fdsections=yes], [ac_fdsections=no])
 250   if test "$ac_test_CXXFLAGS" = set; then
 251     CXXFLAGS="$ac_save_CXXFLAGS"
 252   else
 253     # this is the suspicious part
 254     CXXFLAGS=''
 255   fi
 256   if test "$ac_fdsections" = "yes"; then
 257     SECTION_FLAGS='-ffunction-sections -fdata-sections'
 258   fi
 259   AC_MSG_RESULT($ac_fdsections)
 260
 261   AC_LANG_RESTORE
 262   AC_SUBST(WERROR)
 263   AC_SUBST(WFMT_FLAGS)
 264   AC_SUBST(SECTION_FLAGS)
 265 ])
 266
 267
 268 dnl
 269 dnl If GNU ld is in use, check to see if tricky linker opts can be used.  If
 270 dnl the native linker is in use, all variables will be defined to something
 271 dnl safe (like an empty string).
 272 dnl
 273 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
 274 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
 275 dnl
 276 dnl GLIBCPP_CHECK_LINKER_FEATURES
 277 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
 278   # If we're not using GNU ld, then there's no point in even trying these
 279   # tests.  Check for that first.  We should have already tested for gld
 280   # by now (in libtool), but require it now just to be safe...
 281   SECTION_LDFLAGS=''
 282   OPT_LDFLAGS=''
 283   AC_REQUIRE([AC_PROG_LD])
 284
 285   # Set --gc-sections.
 286   if test "$ac_cv_prog_gnu_ld" = "broken"; then
 287     # GNU ld it is!  Joy and bunny rabbits!
 288
 289     # All these tests are for C++; save the language and the compiler flags.
 290     # Need to do this so that g++ won't try to link in libstdc++
 291     ac_test_CFLAGS="${CFLAGS+set}"
 292     ac_save_CFLAGS="$CFLAGS"
 293     CFLAGS='-x c++  -Wl,--gc-sections'
 294
 295     # Check for -Wl,--gc-sections
 296     # XXX This test is broken at the moment, as symbols required for
 297     # linking are now in libsupc++ (not built yet.....). In addition,
 298     # this test has cored on solaris in the past. In addition,
 299     # --gc-sections doesn't really work at the moment (keeps on discarding
 300     # used sections, first .eh_frame and now some of the glibc sections for
 301     # iconv). Bzzzzt. Thanks for playing, maybe next time.
 302     AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
 303     AC_TRY_RUN([
 304      int main(void)
 305      {
 306        try { throw 1; }
 307        catch (...) { };
 308        return 0;
 309      }
 310     ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
 311     if test "$ac_test_CFLAGS" = set; then
 312       CFLAGS="$ac_save_CFLAGS"
 313     else
 314       # this is the suspicious part
 315       CFLAGS=''
 316     fi
 317     if test "$ac_sectionLDflags" = "yes"; then
 318       SECTION_LDFLAGS='-Wl,--gc-sections'
 319     fi
 320     AC_MSG_RESULT($ac_sectionLDflags)
 321   fi
 322
 323   # Set linker optimization flags.
 324   if test "$ac_cv_prog_gnu_ld" = "yes"; then
 325     OPT_LDFLAGS='-Wl,-O1'
 326   fi
 327
 328   AC_SUBST(SECTION_LDFLAGS)
 329   AC_SUBST(OPT_LDFLAGS)
 330 ])
 331
 332
 333 dnl
 334 dnl Check to see if the (math function) argument passed is
 335 dnl 1) declared when using the c++ compiler
 336 dnl 2) has "C" linkage
 337 dnl
 338 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 339 dnl
 340 dnl argument 1 is name of function to check
 341 dnl
 342 dnl ASSUMES argument is a math function with ONE parameter
 343 dnl
 344 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
 345 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
 346   AC_MSG_CHECKING([for $1 declaration])
 347   AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 348     AC_LANG_SAVE
 349     AC_LANG_CPLUSPLUS
 350     AC_TRY_COMPILE([#include <math.h>],
 351                    [ $1(0);],
 352                    [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 353     AC_LANG_RESTORE
 354   ])
 355   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 356   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 357     AC_CHECK_FUNCS($1)
 358   fi
 359 ])
 360
 361
 362 dnl
 363 dnl Check to see if the (math function) argument passed is
 364 dnl 1) declared when using the c++ compiler
 365 dnl 2) has "C" linkage
 366 dnl
 367 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 368 dnl
 369 dnl argument 1 is name of function to check
 370 dnl
 371 dnl ASSUMES argument is a math function with TWO parameters
 372 dnl
 373 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
 374 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
 375   AC_MSG_CHECKING([for $1 declaration])
 376   AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 377     AC_LANG_SAVE
 378     AC_LANG_CPLUSPLUS
 379     AC_TRY_COMPILE([#include <math.h>],
 380                    [ $1(0, 0);],
 381                    [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 382     AC_LANG_RESTORE
 383   ])
 384   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 385   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 386     AC_CHECK_FUNCS($1)
 387   fi
 388 ])
 389
 390
 391 dnl
 392 dnl Check to see if the (math function) argument passed is
 393 dnl 1) declared when using the c++ compiler
 394 dnl 2) has "C" linkage
 395 dnl
 396 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 397 dnl
 398 dnl argument 1 is name of function to check
 399 dnl
 400 dnl ASSUMES argument is a math function with THREE parameters
 401 dnl
 402 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
 403 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
 404   AC_MSG_CHECKING([for $1 declaration])
 405   AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 406     AC_LANG_SAVE
 407     AC_LANG_CPLUSPLUS
 408     AC_TRY_COMPILE([#include <math.h>],
 409                    [ $1(0, 0, 0);],
 410                    [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 411     AC_LANG_RESTORE
 412   ])
 413   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 414   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 415     AC_CHECK_FUNCS($1)
 416   fi
 417 ])
 418
 419
 420 dnl
 421 dnl Check to see if the (stdlib function) argument passed is
 422 dnl 1) declared when using the c++ compiler
 423 dnl 2) has "C" linkage
 424 dnl
 425 dnl Define HAVE_STRTOLD if "strtold" is declared and links
 426 dnl Define HAVE_STRTOF if "strtof" is declared and links
 427 dnl
 428 dnl argument 1 is name of function to check
 429 dnl
 430 dnl ASSUMES argument is a math function with TWO parameters
 431 dnl
 432 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
 433 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
 434   AC_MSG_CHECKING([for $1 declaration])
 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_$1_use=no])
 441     AC_LANG_RESTORE
 442   ])
 443   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 444   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 445     AC_CHECK_FUNCS($1)
 446   fi
 447 ])
 448
 449
 450 dnl
 451 dnl Because the builtins are picky picky picky about the arguments they take,
 452 dnl do an explict linkage tests here.
 453 dnl Check to see if the (math function) argument passed is
 454 dnl 1) declared when using the c++ compiler
 455 dnl 2) has "C" linkage
 456 dnl
 457 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 458 dnl
 459 dnl argument 1 is name of function to check
 460 dnl
 461 dnl ASSUMES argument is a math function with ONE parameter
 462 dnl
 463 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
 464 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
 465   AC_MSG_CHECKING([for $1 declaration])
 466   AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 467     AC_LANG_SAVE
 468     AC_LANG_CPLUSPLUS
 469     AC_TRY_COMPILE([#include <math.h>],
 470                    [ $1(0);],
 471                    [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 472     AC_LANG_RESTORE
 473   ])
 474   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 475   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 476     AC_MSG_CHECKING([for $1 linkage])
 477     AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
 478       AC_TRY_LINK([#include <math.h>],
 479                   [ $1(0);],
 480                   [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
 481     ])
 482     AC_MSG_RESULT($glibcpp_cv_func_$1_link)
 483     if test x$glibcpp_cv_func_$1_link = x"yes"; then
 484       ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 485       AC_DEFINE_UNQUOTED(${ac_tr_func})
 486     fi
 487   fi
 488 ])
 489
 490
 491 dnl
 492 dnl Check to see what builtin math functions are supported
 493 dnl
 494 dnl check for __builtin_abs
 495 dnl check for __builtin_fabsf
 496 dnl check for __builtin_fabs
 497 dnl check for __builtin_fabl
 498 dnl check for __builtin_labs
 499 dnl check for __builtin_sqrtf
 500 dnl check for __builtin_sqrtl
 501 dnl check for __builtin_fsqrt
 502 dnl check for __builtin_sinf
 503 dnl check for __builtin_sin
 504 dnl check for __builtin_sinl
 505 dnl check for __builtin_cosf
 506 dnl check for __builtin_cos
 507 dnl check for __builtin_cosl
 508 dnl
 509 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 510 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
 511   dnl Test for builtin math functions.
 512   dnl These are made in gcc/c-common.c
 513   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
 514   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
 515   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
 516   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
 517   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
 518
 519   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
 520   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
 521   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
 522
 523   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
 524   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
 525   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
 526
 527   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
 528   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
 529   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
 530
 531   dnl There is, without a doubt, a more elegant way to have these
 532   dnl names exported so that they won't be stripped out of acconfig.h by
 533   dnl autoheader. I leave this as an exercise to somebody less frustrated
 534   dnl than I.... please email the libstdc++ list if you can figure out a
 535   dnl more elegant approach (see autoconf/acgen.m4 and specifically
 536   dnl AC_CHECK_FUNC for things to steal.)
 537   dummyvar=no
 538   if test x$dummyvar = x"yes"; then
 539     AC_DEFINE(HAVE___BUILTIN_ABS)
 540     AC_DEFINE(HAVE___BUILTIN_LABS)
 541     AC_DEFINE(HAVE___BUILTIN_COS)
 542     AC_DEFINE(HAVE___BUILTIN_COSF)
 543     AC_DEFINE(HAVE___BUILTIN_COSL)
 544     AC_DEFINE(HAVE___BUILTIN_FABS)
 545     AC_DEFINE(HAVE___BUILTIN_FABSF)
 546     AC_DEFINE(HAVE___BUILTIN_FABSL)
 547     AC_DEFINE(HAVE___BUILTIN_SIN)
 548     AC_DEFINE(HAVE___BUILTIN_SINF)
 549     AC_DEFINE(HAVE___BUILTIN_SINL)
 550     AC_DEFINE(HAVE___BUILTIN_FSQRT)
 551     AC_DEFINE(HAVE___BUILTIN_SQRTF)
 552     AC_DEFINE(HAVE___BUILTIN_SQRTL)
 553   fi
 554 ])
 555
 556
 557 dnl
 558 dnl Check to see what the underlying c library
 559 dnl These checks need to do two things:
 560 dnl 1) make sure the name is declared when using the c++ compiler
 561 dnl 2) make sure the name has "C" linkage
 562 dnl This might seem like overkill but experience has shown that it's not...
 563 dnl
 564 dnl Define HAVE_STRTOF etc if "strtof" is found.
 565 dnl Define HAVE_STRTOLD etc if "strtold" is found.
 566 dnl
 567 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
 568 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
 569   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 570   ac_save_CXXFLAGS="$CXXFLAGS"
 571   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 572
 573   AC_CHECK_FUNCS(strtof)
 574   GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
 575
 576   CXXFLAGS="$ac_save_CXXFLAGS"
 577 ])
 578
 579
 580 dnl
 581 dnl Check to see what the underlying c library or math library is like.
 582 dnl These checks need to do two things:
 583 dnl 1) make sure the name is declared when using the c++ compiler
 584 dnl 2) make sure the name has "C" linkage
 585 dnl This might seem like overkill but experience has shown that it's not...
 586 dnl
 587 dnl Define HAVE_CARGF etc if "cargf" is found.
 588 dnl
 589 dnl GLIBCPP_CHECK_MATH_SUPPORT
 590 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
 591   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 592   ac_save_CXXFLAGS="$CXXFLAGS"
 593   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 594
 595   dnl Check libm
 596   AC_CHECK_LIB(m, sin, libm="-lm")
 597   ac_save_LIBS="$LIBS"
 598   LIBS="$LIBS $libm"
 599
 600   dnl Check to see if certain C math functions exist.
 601   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
 602   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
 603   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
 604   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
 605   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
 606   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
 607   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
 608
 609   dnl Check to see if basic C math functions have float versions.
 610   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
 611   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
 612   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(acosf)
 613   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(asinf)
 614   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(atanf)
 615   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
 616   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(ceilf)
 617   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(cosf)
 618   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(coshf)
 619   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
 620   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
 621   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(floorf)
 622   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
 623   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
 624   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
 625   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
 626   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
 627   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
 628   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
 629   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinf)
 630   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinhf)
 631   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
 632   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanf)
 633   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanhf)
 634   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
 635   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
 636
 637   dnl Check to see if basic C math functions have long double versions.
 638   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
 639   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
 640   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
 641   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(acosl)
 642   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(asinl)
 643   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(atanl)
 644   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
 645   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(ceill)
 646   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(cosl)
 647   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(coshl)
 648   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
 649   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
 650   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(floorl)
 651   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
 652   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
 653   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
 654   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
 655   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
 656   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
 657   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
 658   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinl)
 659   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinhl)
 660   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
 661   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanl)
 662   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanhl)
 663   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
 664   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
 665
 666   dnl Some runtimes have these functions with a preceding underscore. Please
 667   dnl keep this sync'd with the one above. And if you add any new symbol,
 668   dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
 669   dnl Check to see if certain C math functions exist.
 670   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinf)
 671   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnan)
 672   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finite)
 673   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_copysign)
 674   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincos)
 675   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fpclass)
 676   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_qfpclass)
 677
 678   dnl Check to see if basic C math functions have float versions.
 679   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnanf)
 680   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinff)
 681   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_acosf)
 682   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_asinf)
 683   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_atanf)
 684   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_atan2f)
 685   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_ceilf)
 686   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_cosf)
 687   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_coshf)
 688   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_expf)
 689   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fabsf)
 690   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_floorf)
 691   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_fmodf)
 692   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_frexpf)
 693   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_ldexpf)
 694   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_logf)
 695   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_log10f)
 696   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_modff)
 697   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_powf)
 698   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinf)
 699   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinhf)
 700   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sqrtf)
 701   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanf)
 702   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanhf)
 703   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincosf)
 704   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finitef)
 705
 706   dnl Check to see if basic C math functions have long double versions.
 707   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnanl)
 708   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinfl)
 709   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_copysignl)
 710   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_acosl)
 711   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_asinl)
 712   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_atanl)
 713   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_atan2l)
 714   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_ceill)
 715   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_cosl)
 716   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_coshl)
 717   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_expl)
 718   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fabsl)
 719   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_floorl)
 720   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_fmodl)
 721   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_frexpl)
 722   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_ldexpl)
 723   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_logl)
 724   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_log10l)
 725   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_modfl)
 726   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_powl)
 727   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinl)
 728   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinhl)
 729   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sqrtl)
 730   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanl)
 731   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanhl)
 732   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincosl)
 733   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finitel)
 734
 735   LIBS="$ac_save_LIBS"
 736   CXXFLAGS="$ac_save_CXXFLAGS"
 737 ])
 738
 739
 740 dnl
 741 dnl Check to see if there is native support for complex
 742 dnl
 743 dnl Don't compile bits in math/* if native support exits.
 744 dnl
 745 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
 746 dnl
 747 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 748 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
 749   dnl Check for complex versions of math functions of platform.
 750   AC_CHECK_HEADERS([complex.h])
 751   AC_CHECK_LIB(m, main)
 752   AC_REPLACE_MATHFUNCS(cabs cabsf ccos ccosf ccosh ccoshf cexp cexpf \
 753   c_log c_logf clog10 clog10f cpow cpowf csin csinf csinh csinhf csqrt \
 754   csqrtf ctan ctanf ctanh ctanhf carg cargf nan hypot hypotf atan2f expf \
 755   copysignf)
 756
 757   dnl Compile the long double complex functions only if the function
 758   dnl provides the non-complex long double functions that are needed.
 759   dnl Currently this includes copysignl and atan2l, which should be
 760   dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
 761   USE_COMPLEX_LONG_DOUBLE=no
 762   if test x$ac_cv_func_atan2l = x"yes" \
 763      && test x$ac_cv_func_copysignl = x"yes"; then
 764     USE_COMPLEX_LONG_DOUBLE=yes
 765     AC_REPLACE_MATHFUNCS(cabsl ccoshl ccosl cexpl cpowl csinhl csinl \
 766     csqrtl ctanhl ctanl cargl hypotl signbitl c_logl clog10l)
 767   fi
 768
 769   AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
 770 ])
 771
 772
 773 dnl Check to see what architecture and operating system we are compiling
 774 dnl for.  Also, if architecture- or OS-specific flags are required for
 775 dnl compilation, pick them up here.
 776 dnl
 777 dnl GLIBCPP_CHECK_TARGET
 778 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
 779     . [$]{glibcpp_basedir}/configure.target
 780     AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
 781     AC_MSG_RESULT(OS config directory is $os_include_dir)
 782     AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
 783 ])
 784
 785
 786 dnl
 787 dnl Check to see what the underlying c library's interface to ctype looks
 788 dnl like. Bits of locale rely on things like isspace, toupper, etc. This
 789 dnl stuff makes sure the right bits from the clibrary get called.
 790 dnl
 791 dnl Depending on what is found, select various configure/*/bits/ctype_base.h
 792 dnl Depending on what is found, select various configure/*/ctype.cc
 793 dnl
 794 dnl GLIBCPP_CHECK_CTYPE_SUPPORT
 795 AC_DEFUN(GLIBCPP_CHECK_CTYPE_SUPPORT, [
 796   AC_CHECK_HEADER(ctype.h, [
 797
 798     dnl If doesn't match any specified, go with defaults.
 799     ctype_default=yes
 800
 801     dnl Test for <ctype> functionality -- GNU/Linux
 802     AC_MSG_CHECKING([<ctype> for GNU/Linux])
 803     AC_TRY_COMPILE([#include <ctype.h>],
 804     [int
 805     foo (int a)
 806     { return _ISspace + _ISprint + _IScntrl + _ISupper + _ISlower + _ISalpha \
 807         + _ISdigit + _ISpunct + _ISxdigit + _ISalnum + _ISgraph \
 808         + __ctype_tolower[a] + __ctype_toupper[a] + __ctype_b[a];}], \
 809     ctype_linux=yes, ctype_linux=no)
 810     AC_MSG_RESULT($ctype_linux)
 811     if test $ctype_linux = "yes"; then
 812       ctype_include_dir="config/os/gnu-linux"
 813       ctype_default=no
 814     fi
 815
 816     dnl Test for <ctype> functionality -- FreeBSD 4.0
 817     if test $ctype_default = "yes"; then
 818     AC_MSG_CHECKING([<ctype> for FreeBSD 4.0])
 819     AC_TRY_COMPILE([#include <ctype.h>],
 820     [int
 821     foo (int a)
 822     { return _CTYPE_S + _CTYPE_R + _CTYPE_C + _CTYPE_U + _CTYPE_L + _CTYPE_A \
 823         + _CTYPE_D + _CTYPE_P + _CTYPE_X + _CTYPE_G ;}], \
 824     ctype_bsd=yes, ctype_bsd=no)
 825     AC_MSG_RESULT($ctype_bsd)
 826     if test $ctype_bsd = "yes"; then
 827       ctype_include_dir="config/os/bsd"
 828       ctype_default=no
 829     fi
 830     fi
 831
 832     dnl Test for <ctype> functionality -- FreeBSD 3.4
 833     if test $ctype_default = "yes"; then
 834     AC_MSG_CHECKING([<ctype> for FreeBSD 3.4])
 835     AC_TRY_COMPILE([#include <ctype.h>],
 836     [int
 837     foo (int a)
 838     { return _S + _R + _C + _U + _L + _A \
 839       + _D + _P + _X + _G + __istype (a, 0);}], \
 840     ctype_freebsd34=yes, ctype_freebsd34=no)
 841     AC_MSG_RESULT($ctype_freebsd34)
 842     if test $ctype_freebsd34 = "yes"; then
 843       ctype_include_dir="config/os/bsd"
 844       ctype_default=no
 845     fi
 846     fi
 847
 848     dnl Test for <ctype> functionality -- Solaris 2.6 and up
 849     if test $ctype_default = "yes"; then
 850     AC_MSG_CHECKING([<ctype> for Solaris 2.6,7,8])
 851     AC_TRY_COMPILE([#include <ctype.h>],
 852     [int
 853     foo (int a)
 854     { return _ISSPACE + _ISPRINT + _ISCNTRL + _ISUPPER + _ISLOWER + _ISALPHA \
 855         + _ISDIGIT + _ISPUNCT + _ISXDIGIT + _ISALNUM + _ISGRAPH \
 856         + __trans_lower[a] + __trans_upper[a] + __ctype_mask[a];}], \
 857     ctype_solaris=yes, ctype_solaris=no)
 858     AC_MSG_RESULT($ctype_solaris)
 859
 860     if test $ctype_solaris = "yes"; then
 861       AC_MSG_CHECKING([  for version])
 862       AC_LANG_CPLUSPLUS
 863       AC_TRY_COMPILE([#include <ctype.h>],
 864       [typedef long* __to_type; __to_type const& _M_toupper = __trans_upper;],\
 865       ctype_solaris26=yes, ctype_solaris26=no)
 866       AC_LANG_C
 867       if test $ctype_solaris26 = "yes"; then
 868         ctype_include_dir="config/os/solaris/solaris2.6"
 869         AC_MSG_RESULT([Solaris 2.6])
 870         ctype_default=no
 871       else
 872         ctype_include_dir="config/os/solaris/solaris2.7"
 873         AC_MSG_RESULT([Solaris 7,8])
 874         ctype_default=no
 875       fi
 876     fi
 877     fi
 878
 879     dnl Test for <ctype> functionality -- Solaris 2.5.1
 880     if test $ctype_default = "yes"; then
 881     AC_MSG_CHECKING([<ctype> for Solaris 2.5.1])
 882     AC_TRY_COMPILE([#include <ctype.h>],
 883     [int
 884     foo (int a)
 885     { return _U + _L + _N + _S + _P + _C + _X + _B \
 886         + __ctype[a];}], \
 887     ctype_solaris25=yes, ctype_solaris25=no)
 888     AC_MSG_RESULT($ctype_solaris25)
 889     if test $ctype_solaris25 = "yes"; then
 890       ctype_include_dir="config/os/solaris/solaris2.5"
 891       ctype_default=no
 892     fi
 893     fi
 894
 895     dnl Test for <ctype> functionality -- AIX
 896     if test $ctype_default = "yes"; then
 897     AC_MSG_CHECKING([<ctype> for AIX])
 898     AC_TRY_COMPILE([#include <ctype.h>],
 899     [int
 900     foo (int a)
 901     { return _ISSPACE + _ISPRINT + _ISCNTRL + _ISUPPER + _ISLOWER + _ISALPHA \
 902         + _ISDIGIT + _ISPUNCT + _ISXDIGIT + _ISALNUM + _ISGRAPH \
 903         + _VALC('a') + _IS('c', 0);}], \
 904     ctype_aix=yes, ctype_aix=no)
 905     AC_MSG_RESULT($ctype_aix)
 906     if test $ctype_aix = "yes"; then
 907       ctype_include_dir="config/os/aix"
 908       ctype_default=no
 909     fi
 910     fi
 911
 912     dnl Test for <ctype> functionality -- IRIX
 913     if test $ctype_default = "yes"; then
 914     AC_MSG_CHECKING([<ctype> for IRIX])
 915     AC_TRY_COMPILE([#include <ctype.h>],
 916     [int
 917     foo (int a)
 918     { return _U + _L + _N + _S + _P + _C + _B + _X + \
 919              _A + _PR + _G + _BL;}], \
 920     ctype_irix=yes, ctype_irix=no)
 921     AC_MSG_RESULT($ctype_irix)
 922     if test $ctype_irix = "yes"; then
 923       ctype_include_dir="config/os/irix"
 924       ctype_default=no
 925     fi
 926     fi
 927
 928     dnl Test for <ctype> functionality -- newlib
 929     if test $ctype_default = "yes"; then
 930     AC_MSG_CHECKING([<ctype> for newlib])
 931     AC_TRY_COMPILE([#include <ctype.h>],
 932     [int
 933     foo (int a)
 934     { return _U + _L + _N + _S + _P + _C + _X + _B \
 935         + _ctype_[a];}], \
 936     ctype_newlib=yes, ctype_newlib=no)
 937     AC_MSG_RESULT($ctype_newlib)
 938     if test $ctype_newlib = "yes"; then
 939       ctype_include_dir="config/newlib"
 940       ctype_default=no
 941     fi
 942     fi
 943
 944     if test $ctype_default = "yes"; then
 945       ctype_include_dir="config/os/generic"
 946       AC_MSG_WARN("Using default ctype headers.")
 947     fi
 948
 949     AC_LINK_FILES($ctype_include_dir/bits/ctype_base.h,
 950     include/bits/ctype_base.h)
 951     AC_LINK_FILES($ctype_include_dir/bits/ctype_inline.h,
 952     include/bits/ctype_inline.h)
 953     AC_LINK_FILES($ctype_include_dir/bits/ctype_noninline.h, \
 954     include/bits/ctype_noninline.h)
 955   ])
 956 ])
 957
 958
 959 dnl
 960 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
 961 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled.  (This
 962 dnl must have been previously checked.)
 963 dnl
 964 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
 965 dnl Define _GLIBCPP_NEED_MBSTATE_T if mbstate_t is not in wchar.h
 966 dnl
 967 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
 968 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
 969   if test x$enable_c_mbchar != xno; then
 970
 971     dnl Sanity check for existence of ISO C9X headers for extended encoding.
 972     AC_CHECK_HEADER(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
 973     AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
 974
 975     dnl Only continue checking if the ISO C9X headers exist.
 976     if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes; then
 977
 978       dnl Test wchar.h for mbstate_t, which is needed for char_traits
 979       dnl and others.
 980       AC_MSG_CHECKING([for mbstate_t])
 981       AC_TRY_COMPILE([#include <wchar.h>],
 982       [mbstate_t teststate;],
 983       use_native_mbstatet=yes, use_native_mbstatet=no)
 984       AC_MSG_RESULT($use_native_mbstatet)
 985       if test x"$use_native_mbstatet" = xno; then
 986         AC_DEFINE(_GLIBCPP_NEED_MBSTATE_T)
 987       fi
 988
 989       dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
 990       dnl numeric_limits can instantiate type_traits<wchar_t>
 991       AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
 992       AC_TRY_COMPILE([#include <wchar.h>],
 993       [int i = WCHAR_MIN; int j = WCHAR_MAX;],
 994       has_wchar_minmax=yes, has_wchar_minmax=no)
 995       AC_MSG_RESULT($has_wchar_minmax)
 996
 997       dnl Test wchar.h for WEOF, which is what we use to determine whether
 998       dnl to specialize for char_traits<wchar_t> or not.
 999       AC_MSG_CHECKING([for WEOF])
1000       AC_TRY_COMPILE([
1001         #include <wchar.h>
1002         #include <stddef.h>],
1003       [wint_t i = WEOF;],
1004       has_weof=yes, has_weof=no)
1005       AC_MSG_RESULT($has_weof)
1006
1007       dnl Tests for wide character functions used in char_traits<wchar_t>.
1008       AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset \
1009       wcsrtombs mbsrtowcs, ac_wfuncs=yes, ac_wfuncs=no)
1010
1011       AC_MSG_CHECKING([for ISO C9X wchar_t support])
1012       if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
1013          && test x"$ac_wfuncs" = xyes; then
1014         ac_isoC9X_wchar_t=yes
1015       else
1016         ac_isoC9X_wchar_t=no
1017       fi
1018       AC_MSG_RESULT($ac_isoC9X_wchar_t)
1019
1020       dnl Use iconv for wchar_t to char conversions. As such, check for
1021       dnl X/Open Portability Guide, version 2 features (XPG2).
1022       AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
1023       AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
1024
1025       dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
1026       AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
1027       ac_save_LIBS="$LIBS"
1028       LIBS="$LIBS $libiconv"
1029
1030       AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
1031       ac_XPG2funcs=yes, ac_XPG2funcs=no)
1032
1033       LIBS="$ac_save_LIBS"
1034
1035       AC_MSG_CHECKING([for XPG2 wchar_t support])
1036       if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
1037          && test x"$ac_XPG2funcs" = xyes; then
1038         ac_XPG2_wchar_t=yes
1039       else
1040         ac_XPG2_wchar_t=no
1041       fi
1042       AC_MSG_RESULT($ac_XPG2_wchar_t)
1043
1044       dnl At the moment, only enable wchar_t specializations if all the
1045       dnl above support is present.
1046       AC_MSG_CHECKING([for enabled wchar_t specializations])
1047       if test x"$ac_isoC9X_wchar_t" = xyes \
1048          && test x"$ac_XPG2_wchar_t" = xyes; then
1049         libinst_wstring_la="libinst-wstring.la"
1050         AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
1051         AC_MSG_RESULT("yes")
1052       else
1053         libinst_wstring_la=""
1054         AC_MSG_RESULT("no")
1055       fi
1056       AC_SUBST(libinst_wstring_la)
1057
1058     else
1059       AC_MSG_WARN([<wchar.h> not found])
1060       AC_DEFINE(_GLIBCPP_NEED_MBSTATE_T)
1061     fi
1062
1063   else
1064     dnl Wide characters disabled by the user.  Maybe print a warning?
1065     :
1066   fi
1067 ])
1068
1069
1070 dnl
1071 dnl Check to see if this version of GNU C++ is afflicted by bugs in
1072 dnl __complex__ float support.
1073 dnl
1074 dnl Define _GLIBCPP_BUGGY_FLOAT_COMPLEX if buggy.
1075 dnl
1076 dnl Check to see if this version of GNU C++ is afflicted by bugs in
1077 dnl __complex__ support.Check for buggy __complex__ that will cause ICE in
1078 dnl gcc-2.95.x when using the library, unless we define the default copy
1079 dnl ctor in the specializations of complex<>.
1080 dnl
1081 dnl Define _GLIBCPP_BUGGY_COMPLEX if buggy.
1082 dnl GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
1083 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT, [
1084   AC_REQUIRE([AC_PROG_CXX])
1085
1086   AC_MSG_CHECKING([for GNU C++ __complex__ support])
1087   AC_CACHE_VAL(glibcpp_cv_complex, [
1088     AC_LANG_SAVE
1089     AC_LANG_CPLUSPLUS
1090     AC_TRY_COMPILE([struct dcomplex { __complex__ double x; }; \
1091                     dcomplex f(const dcomplex& x) { return dcomplex(x); }], \
1092                     [ dcomplex x; f(x); ],
1093       glibcpp_cv_complex=ok,
1094       glibcpp_cv_complex=buggy
1095     )
1096     AC_LANG_RESTORE
1097   ])
1098   AC_MSG_RESULT($glibcpp_cv_complex)
1099   if test $glibcpp_cv_complex = buggy; then
1100     AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
1101   fi
1102
1103   AC_MSG_CHECKING([for GNU C++ __complex__ float support])
1104   AC_CACHE_VAL(glibcpp_cv_float_complex, [
1105     AC_LANG_SAVE
1106     AC_LANG_CPLUSPLUS
1107     rm -f conftest.h
1108     cat > conftest.h <<EOB
1109       //
1110       // Check for buggy __complex__ that causes ICE in most versions of egcs
1111       // and gcc-2.95.x on certain platforms (eg., x86-win32).
1112       //
1113       // See http://gcc.gnu.org/ml/gcc-bugs/1999-07n/msg00845.html for
1114       // more info on the bug itself.
1115       //
1116       struct
1117       float_complex
1118       {
1119        __complex__ float m_value;
1120        float_complex (float = 0.0f, float = 0.0f);
1121        float_complex (__complex__ float val) : m_value (val) {}
1122        float_complex foo (const float_complex &val)
1123          { return float_complex (~val.m_value); }
1124       };
1125 EOB
1126     AC_TRY_COMPILE([#include "conftest.h"], ,
1127       glibcpp_cv_float_complex=ok,
1128       glibcpp_cv_float_complex=buggy
1129     )
1130     AC_LANG_RESTORE
1131   ])
1132   AC_MSG_RESULT($glibcpp_cv_float_complex)
1133   if test $glibcpp_cv_float_complex = buggy; then
1134     AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
1135   fi
1136 ])
1137
1138
1139 dnl
1140 dnl Check for special debugging mode; not for production use.
1141 dnl
1142 dnl GLIBCPP_ENABLE_DEBUG
1143 dnl --enable-debug sets '-ggdb3 -O0'.
1144 dnl --disable-debug sets '-g' and whatever optimization options the
1145 dnl     compiler can handle.
1146 dnl  +  --enable-maintainer-mode automatically defaults this to on.
1147 dnl  +  Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
1148 dnl  +  Usage:  GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
1149 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1150 dnl       defaults to `no'.
1151 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
1152 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
1153 AC_ARG_ENABLE(debug,
1154 changequote(<<, >>)dnl
1155 <<  --enable-debug          extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
1156 changequote([, ])dnl
1157 [case "${enableval}" in
1158  yes) enable_debug=yes ;;
1159  no)  enable_debug=no ;;
1160  *)   AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
1161  esac],
1162 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
1163
1164 dnl Option parsed, now set things appropriately
1165 case "${enable_debug}" in
1166     yes)
1167         DEBUG_FLAGS='-O0 -ggdb3'
1168         ;;
1169     no)
1170         DEBUG_FLAGS='-g'
1171         ;;
1172 esac
1173 AC_SUBST(DEBUG_FLAGS)
1174 ])
1175
1176
1177 dnl
1178 dnl Check for "unusual" flags to pass to the compiler while building.
1179 dnl
1180 dnl GLIBCPP_ENABLE_CXX_FLAGS
1181 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1182 dnl     experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
1183 dnl     Somehow this same set of flags must be passed when [re]building
1184 dnl     libgcc.
1185 dnl --disable-cxx-flags passes nothing.
1186 dnl  +  See http://sourceware.cygnus.com/ml/libstdc++/2000-q2/msg00131.html
1187 dnl         http://sourceware.cygnus.com/ml/libstdc++/2000-q2/msg00284.html
1188 dnl         http://sourceware.cygnus.com/ml/libstdc++/2000-q1/msg00035.html
1189 dnl  +  Usage:  GLIBCPP_ENABLE_CXX_FLAGS(default flags)
1190 dnl       If "default flags" is an empty string (or "none"), the effect is
1191 dnl       the same as --disable or --enable=no.
1192 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
1193 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1194 AC_ARG_ENABLE(cxx-flags,
1195 changequote(<<, >>)dnl
1196 <<  --enable-cxx-flags=FLAGS      pass compiler FLAGS when building library;
1197                                 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
1198 changequote([, ])dnl
1199 [case "x$enableval" in
1200  xyes)
1201         AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
1202  xno|x)
1203         enable_cxx_flags='' ;;
1204  *)
1205         enable_cxx_flags="$enableval" ;;
1206  esac],
1207 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
1208
1209 dnl Thinko on my part during design.  This kludge is the workaround.
1210 if test "$enable_cxx_flags" = "none"; then
1211   enable_cxx_flags='';
1212 fi
1213
1214 dnl Run through flags (either default or command-line) and set anything
1215 dnl extra (e.g., #defines) that must accompany particular g++ options.
1216 if test -n "$enable_cxx_flags"; then
1217     for f in $enable_cxx_flags; do
1218         case "$f" in
1219             -fhonor-std)  ;;
1220             -*)  ;;
1221             *)   # and we're trying to pass /what/ exactly?
1222                  AC_MSG_ERROR([compiler flags start with a -]) ;;
1223         esac
1224     done
1225 fi
1226 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1227 AC_SUBST(EXTRA_CXX_FLAGS)
1228 ])
1229
1230
1231 dnl
1232 dnl Check for which I/O library to use:  libio, or something specific.
1233 dnl
1234 dnl GLIBCPP_ENABLE_CSTDIO
1235 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1236 dnl
1237 dnl default is libio
1238 dnl
1239 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1240   AC_MSG_CHECKING([for cstdio to use])
1241   AC_ARG_ENABLE(cstdio,
1242   [  --enable-cstdio        enable GNU libio for target io package. (default)
1243      --enable-cstdio=LIB    use LIB target-speific io package.],
1244   if test x$enable_cstdio = xno; then
1245      enable_cstdio=libio
1246   fi,
1247      enable_cstdio=libio)
1248
1249   enable_cstdio_flag=$enable_cstdio
1250
1251   dnl Check if a valid I/O package
1252   case x${enable_cstdio_flag} in
1253     xlibio | x | xno | xnone | xyes)
1254       # default
1255       CSTDIO_H=config/c_io_libio.h
1256       CSTDIO_CC=config/c_io_libio.cc
1257       AC_MSG_RESULT(libio)
1258
1259       # see if we are on a system with libio native (ie, linux)
1260       AC_CHECK_HEADER(libio.h,  has_libio=yes, has_libio=no)
1261
1262       # Need to check and see what version of glibc is being used. If
1263       # it's not glibc-2.2 or higher, then we'll need to go ahead and
1264       # compile most of libio for linux systems.
1265       if test x$has_libio = x"yes"; then
1266         case "$target" in
1267           *-*-linux*)
1268               AC_MSG_CHECKING([for glibc version >= 2.2])
1269               AC_EGREP_CPP([ok], [
1270             #include <features.h>
1271               #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1272                     ok
1273               #endif
1274               ], glibc_satisfactory=yes, glibc_satisfactory=no)
1275               AC_MSG_RESULT($glibc_satisfactory)
1276             ;;
1277         esac
1278
1279         # XXX at the moment, admit defeat and force the recompilation
1280         # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1281         glibc_satisfactory=no
1282
1283         if test x$glibc_satisfactory = x"yes"; then
1284            need_libio=no
1285            need_wlibio=no
1286         else
1287            need_libio=yes
1288            # bkoz XXX need to add checks to enable this
1289            # pme XXX here's a first pass at such a check
1290            if test x$enable_c_mbchar != xno; then
1291               need_wlibio=yes
1292            else
1293               need_wlibio=no
1294            fi
1295         fi
1296
1297       else
1298          # Using libio, but <libio.h> doesn't exist on the target system. . .
1299          need_libio=yes
1300          # bkoz XXX need to add checks to enable this
1301          # pme XXX here's a first pass at such a check
1302          if test x$enable_c_mbchar != xno; then
1303              need_wlibio=yes
1304          else
1305              need_wlibio=no
1306          fi
1307       fi
1308       ;;
1309     xstdio)
1310       CSTDIO_H=config/c_io_stdio.h
1311       CSTDIO_CC=config/c_io_stdio.cc
1312       AC_MSG_RESULT(stdio)
1313
1314       need_libio=no
1315       ;;
1316     *)
1317       echo "$enable_cstdio is an unknown io package" 1>&2
1318       exit 1
1319       ;;
1320   esac
1321   AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1322   AC_LINK_FILES($CSTDIO_CC, src/c++io.cc)
1323
1324   # 2000-08-04 bkoz hack
1325   CCODECVT_C=config/c_io_libio_codecvt.c
1326   AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1327   # 2000-08-04 bkoz hack
1328
1329   AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1330   AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1331 ])
1332
1333
1334 dnl
1335 dnl Check for which threading library to use.
1336 dnl
1337 dnl GLIBCPP_ENABLE_THREADS
1338 dnl --enable-threads=posix sets config/threads-posix.h et. al.
1339 dnl
1340 dnl Default is no threads, which also disables _IO_MTSAFE_IO in
1341 dnl libio.  Any actual thread package will enable it.
1342 dnl
1343 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1344   dnl Note this comes from the gcc/config.in and libjava/config.in
1345   dnl Efforts should be made to keep this in sync.
1346   AC_MSG_CHECKING([for threads package to use])
1347   AC_ARG_ENABLE(threads,
1348   [  --enable-threads        enable thread usage for target GCC.
1349      --enable-threads=LIB    use LIB thread package for target GCC.],
1350   if test x$enable_threads = xno; then
1351     enable_threads=''
1352   fi,
1353     enable_threads='')
1354
1355   enable_threads_flag=$enable_threads
1356
1357   dnl Check if a valid thread package
1358   case x${enable_threads_flag} in
1359         x | xno | xnone)
1360                 # No threads
1361                 target_thread_file='single'
1362                 ;;
1363         xyes)
1364                 # default
1365                 target_thread_file='posix'
1366                 ;;
1367         xdecosf1 | xirix | xmach | xos2 | xposix | xpthreads | xsingle | \
1368         xsolaris | xwin32 | xdce | xvxworks)
1369                 target_thread_file=$enable_threads_flag
1370                 ;;
1371         *)
1372                 echo "$enable_threads is an unknown thread package" 1>&2
1373                 exit 1
1374                 ;;
1375   esac
1376
1377   dnl Check for thread package actually supported in libstdc++
1378   THREADH=
1379   case "$target_thread_file" in
1380     no | none | single)
1381       THREADH=threads-no.h
1382       ;;
1383     posix | pthreads)
1384       THREADH=threads-posix.h
1385       ;;
1386     decosf1 | irix | mach | os2 | solaris | win32 | dce | vxworks)
1387       AC_MSG_ERROR(thread package $THREADS not yet supported)
1388       ;;
1389     *)
1390       AC_MSG_ERROR($THREADS is an unsupported/unknown thread package)
1391       ;;
1392   esac
1393   AC_MSG_RESULT($THREADH)
1394
1395   AC_LINK_FILES(config/$THREADH, include/bits/c++threads.h)
1396   if test $THREADH != threads-no.h; then
1397     AC_DEFINE(_GLIBCPP_USE_THREADS)
1398   fi
1399 ])
1400
1401
1402 dnl Enable atomic locking
1403 dnl GLIBCPP_ENABLE_ATOMICITY
1404 AC_DEFUN(GLIBCPP_ENABLE_ATOMICITY, [
1405     AC_MSG_CHECKING([for atomicity.h])
1406     case "$target" in
1407       *-*-linux* | sparc*-*-* | *-*-freebsd*)
1408         ATOMICITYH=$cpu_include_dir
1409         ;;
1410       *-*-aix* | *-*-irix*)
1411         ATOMICITYH=$os_include_dir
1412         ;;
1413       *)
1414         # bit of overkill on this text...
1415         AC_MSG_ERROR([Atomic locking requested, but $enable_threads is an unknown thread package and atomic operations are not present in the CPU])
1416         ;;
1417     esac
1418     AC_MSG_RESULT($ATOMICITYH/bits/atomicity.h)
1419     AC_LINK_FILES($ATOMICITYH/bits/atomicity.h, include/bits/atomicity.h)
1420 ])
1421
1422
1423 dnl
1424 dnl Check for template specializations for the 'long long' type extension.
1425 dnl
1426 dnl GLIBCPP_ENABLE_LONG_LONG
1427 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1428 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1429 dnl  +  Usage:  GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1430 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1431 dnl       defaults to `no'.
1432 dnl  +  If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1433 dnl
1434 dnl GLIBCPP_ENABLE_LONG_LONG
1435 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1436   define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1437
1438   AC_ARG_ENABLE(long-long,
1439   changequote(<<, >>)dnl
1440   <<--enable-long-long      turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1441   changequote([, ])dnl
1442   [case "$enableval" in
1443    yes) enable_long_long=yes ;;
1444    no)  enable_long_long=no ;;
1445    *)   AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1446    esac],
1447   enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1448
1449   # Check for the existance of functions used if long long is enabled.
1450   AC_CHECK_FUNC(strtoll,,ac_strtoll=no)
1451   AC_CHECK_FUNC(strtoull,,ac_strtoull=no)
1452
1453   AC_MSG_CHECKING([for enabled long long])
1454   if test x"$ac_strtoll" = xno || test x"$ac_strtoull" = xno; then
1455     enable_long_long=no;
1456   fi;
1457   AC_MSG_RESULT($enable_long_long)
1458
1459   dnl Option parsed, now set things appropriately
1460   if test x"$enable_long_long" = xyes; then
1461     AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1462   fi
1463 ])
1464
1465
1466 dnl
1467 dnl Check for whether or not to do shadowed C headers.
1468 dnl
1469 dnl GLIBCPP_ENABLE_SHADOW
1470 dnl --enable-cshadow-headers [does stuff].
1471 dnl --disable-cshadow-headers [does not do stuff].
1472 dnl  +  This will eventually need to be on by default.
1473 dnl  +  Usage:  GLIBCPP_ENABLE_SHADOW[(DEFAULT)]
1474 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1475 dnl       defaults to `no'.
1476 AC_DEFUN(GLIBCPP_ENABLE_SHADOW, [dnl
1477 define([GLIBCPP_ENABLE_SHADOW_DEFAULT], ifelse($1, yes, yes, no))dnl
1478 AC_MSG_CHECKING([for enabled cshadow headers])
1479 AC_ARG_ENABLE(cshadow-headers,
1480 changequote(<<, >>)dnl
1481 <<  --enable-cshadow-headers construct "shadowed" C header files for
1482                            g++ [default=>>GLIBCPP_ENABLE_SHADOW_DEFAULT],
1483 changequote([, ])
1484   [case "$enableval" in
1485    yes) enable_cshadow_headers=yes
1486         ;;
1487    no)  enable_cshadow_headers=no
1488         ;;
1489    *)   AC_MSG_ERROR([Unknown argument to enable/disable shadowed C headers])
1490         ;;
1491   esac],
1492   enable_cshadow_headers=GLIBCPP_ENABLE_SHADOW_DEFAULT)
1493   AC_MSG_RESULT($enable_cshadow_headers)
1494
1495   dnl Option parsed, now set things appropriately
1496   dnl NB: these things may be duplicated in c++config.h as well.
1497   case "$enable_cshadow_headers" in
1498     yes)
1499         CSHADOW_FLAGS="-fno-builtin"
1500         C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1501         AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1502         ;;
1503     no)
1504         CSHADOW_FLAGS=""
1505         C_INCLUDE_DIR='${top_srcdir}/include/c'
1506         ;;
1507   esac
1508
1509   AC_SUBST(CSHADOW_FLAGS)
1510   AC_SUBST(C_INCLUDE_DIR)
1511   AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cshadow_headers" = yes)
1512 ])
1513
1514
1515 dnl
1516 dnl Check for wide character support.  Has the same effect as the option
1517 dnl in gcc's configure, but in a form that autoconf can mess with.
1518 dnl
1519 dnl GLIBCPP_ENABLE_C_MBCHAR
1520 dnl --enable-c-mbchar requests all the wchar_t stuff.
1521 dnl --disable-c-mbchar doesn't.
1522 dnl  +  Usage:  GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1523 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1524 dnl       defaults to `no'.
1525 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1526 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1527 AC_ARG_ENABLE(c-mbchar,
1528 changequote(<<, >>)dnl
1529 <<  --enable-c-mbchar       enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1530 changequote([, ])dnl
1531 [case "$enableval" in
1532  yes) enable_c_mbchar=yes ;;
1533  no)  enable_c_mbchar=no ;;
1534  *)   AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1535  esac],
1536 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1537 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1538 ])
1539
1540
1541 dnl
1542 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1543 dnl
1544 dnl GLIBCPP_INCLUDE_DIR
1545 dnl C_INCLUDE_DIR
1546 dnl TOPLEVEL_INCLUDES
1547 dnl LIBMATH_INCLUDES
1548 dnl LIBSUPCXX_INCLUDES
1549 dnl LIBIO_INCLUDES
1550 dnl CSHADOW_INCLUDES
1551 dnl
1552 dnl GLIBCPP_EXPORT_INCLUDE
1553 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1554   # Root level of the include sources.
1555   GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1556
1557   # Can either use include/c or include/c_std to grab "C" headers. This
1558   # variable is set to the include directory currently in use.
1559   # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_SHADOW
1560
1561   # Passed down for canadian crosses.
1562   if  test x"$CANADIAN" = xyes; then
1563     TOPLEVEL_INCLUDES='-I$(includedir)'
1564   fi
1565
1566   LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1567
1568   LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1569
1570   #if GLIBCPP_NEED_LIBIO
1571   LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1572   #else
1573   #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1574   #endif
1575
1576   #if GLIBCPP_USE_CSHADOW
1577   #  CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1578   #                   -I$(top_blddir)/cshadow'
1579   #else
1580   CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1581   #endif
1582
1583   # Now, export this to all the little Makefiles....
1584   AC_SUBST(GLIBCPP_INCLUDE_DIR)
1585   AC_SUBST(TOPLEVEL_INCLUDES)
1586   AC_SUBST(LIBMATH_INCLUDES)
1587   AC_SUBST(LIBSUPCXX_INCLUDES)
1588   AC_SUBST(LIBIO_INCLUDES)
1589   AC_SUBST(CSHADOW_INCLUDES)
1590 ])
1591
1592
1593 dnl
1594 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1595 dnl
1596 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1597   # Optimization flags that are probably a good idea for thrill-seekers. Just
1598   # uncomment the lines below and make, everything else is ready to go...
1599   # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1600   OPTIMIZE_CXXFLAGS=
1601   AC_SUBST(OPTIMIZE_CXXFLAGS)
1602
1603   WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1604   AC_SUBST(WARN_FLAGS)
1605 ])
1606
1607
1608 # Check whether LC_MESSAGES is available in <locale.h>.
1609 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1610 #
1611 # This file file be copied and used freely without restrictions.  It can
1612 # be used in projects which are not available under the GNU Public License
1613 # but which still want to provide support for the GNU gettext functionality.
1614 # Please note that the actual code is *not* freely available.
1615
1616 # serial 1
1617
1618 AC_DEFUN(AC_LC_MESSAGES,
1619   [if test $ac_cv_header_locale_h = yes; then
1620     AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1621       [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1622        ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1623     if test $ac_cv_val_LC_MESSAGES = yes; then
1624       AC_DEFINE(HAVE_LC_MESSAGES)
1625     fi
1626   fi])
1627
1628
1629 # Check for functions in math library.
1630 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1631 #
1632 # This file can be copied and used freely without restrictions.  It can
1633 # be used in projects which are not available under the GNU Public License
1634 # but which still want to provide support for the GNU gettext functionality.
1635 # Please note that the actual code is *not* freely available.
1636
1637 # serial 1
1638
1639 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1640 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1641 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1642 AC_SUBST(LIBMATHOBJS)dnl
1643 ])
1644
1645
1646 # Check for string functions.
1647 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1648 #
1649 # This file can be copied and used freely without restrictions.  It can
1650 # be used in projects which are not available under the GNU Public License
1651 # but which still want to provide support for the GNU gettext functionality.
1652 # Please note that the actual code is *not* freely available.
1653
1654 # serial 1
1655
1656 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1657 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1658 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1659 AC_SUBST(LIBSTRINGOBJS)dnl
1660 ])
1661
1662
1663 dnl This macro searches for a GNU version of make.  If a match is found, the
1664 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1665 dnl set to "#". This is useful for  including a special features in a Makefile,
1666 dnl which cannot be handled by other versions of make.  The variable
1667 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1668 dnl the empty string otherwise.
1669 dnl
1670 dnl Here is an example of its use:
1671 dnl
1672 dnl Makefile.in might contain:
1673 dnl
1674 dnl     # A failsafe way of putting a dependency rule into a makefile
1675 dnl     $(DEPEND):
1676 dnl             $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1677 dnl
1678 dnl     @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1679 dnl     @ifGNUmake@ include $(DEPEND)
1680 dnl     @ifGNUmake@ endif
1681 dnl
1682 dnl Then configure.in would normally contain:
1683 dnl
1684 dnl     CHECK_GNU_MAKE()
1685 dnl     AC_OUTPUT(Makefile)
1686 dnl
1687 dnl Then perhaps to cause gnu make to override any other make, we could do
1688 dnl something like this (note that GNU make always looks for GNUmakefile first):
1689 dnl
1690 dnl     if  ! test x$_cv_gnu_make_command = x ; then
1691 dnl             mv Makefile GNUmakefile
1692 dnl             echo .DEFAULT: > Makefile ;
1693 dnl             echo \  $_cv_gnu_make_command \$@ >> Makefile;
1694 dnl     fi
1695 dnl
1696 dnl Then, if any (well almost any) other make is called, and GNU make also
1697 dnl exists, then the other make wraps the GNU make.
1698 dnl
1699 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1700 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1701 dnl
1702 dnl #### Changes for libstdc++-v3:  reformatting and linewrapping; prepending
1703 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1704 dnl #### conditional's subshell (" --version" is not a command), using a
1705 dnl #### different option to grep(1).
1706 dnl #### -pme
1707 AC_DEFUN(
1708   GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1709           _cv_gnu_make_command='' ;
1710 dnl Search all the common names for GNU make
1711           for a in "${MAKE:-make}" make gmake gnumake ; do
1712                   if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1713                   then
1714                           _cv_gnu_make_command=$a ;
1715                           break;
1716                   fi
1717           done ;
1718   ) ;
1719 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1720 dnl string, '#' otherwise
1721   if test  "x$_cv_gnu_make_command" != "x"  ; then
1722           ifGNUmake='' ;
1723   else
1724           ifGNUmake='#' ;
1725   fi
1726   AC_SUBST(ifGNUmake)
1727 ])
1728
1729 sinclude(../libtool.m4)
1730 dnl The lines below arrange for aclocal not to bring an installed
1731 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1732 dnl add a definition of LIBTOOL to Makefile.in.
1733 ifelse(,,,[AC_SUBST(LIBTOOL)
1734 AC_DEFUN([AM_PROG_LIBTOOL])
1735 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1736 AC_DEFUN([AC_PROG_LD])
1737 ])
1738
1739
1740 # Do all the work for Automake.  This macro actually does too much --
1741 # some checks are only needed if your package does certain things.
1742 # But this isn't really a big deal.
1743
1744 # serial 1
1745
1746 dnl Usage:
1747 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1748
1749 AC_DEFUN(AM_INIT_AUTOMAKE,
1750 [AC_REQUIRE([AC_PROG_INSTALL])
1751 PACKAGE=[$1]
1752 AC_SUBST(PACKAGE)
1753 VERSION=[$2]
1754 AC_SUBST(VERSION)
1755 dnl test to see if srcdir already configured
1756 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1757   AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1758 fi
1759 ifelse([$3],,
1760 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1761 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1762 AC_REQUIRE([AM_SANITY_CHECK])
1763 AC_REQUIRE([AC_ARG_PROGRAM])
1764 dnl FIXME This is truly gross.
1765 missing_dir=`cd $ac_aux_dir && pwd`
1766 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1767 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1768 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1769 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1770 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1771 AC_REQUIRE([AC_PROG_MAKE_SET])])
1772
1773 #
1774 # Check to make sure that the build environment is sane.
1775 #
1776
1777 AC_DEFUN(AM_SANITY_CHECK,
1778 [AC_MSG_CHECKING([whether build environment is sane])
1779 # Just in case
1780 sleep 1
1781 echo timestamp > conftestfile
1782 # Do `set' in a subshell so we don't clobber the current shell's
1783 # arguments.  Must try -L first in case configure is actually a
1784 # symlink; some systems play weird games with the mod time of symlinks
1785 # (eg FreeBSD returns the mod time of the symlink's containing
1786 # directory).
1787 if (
1788    set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1789    if test "[$]*" = "X"; then
1790       # -L didn't work.
1791       set X `ls -t $srcdir/configure conftestfile`
1792    fi
1793    if test "[$]*" != "X $srcdir/configure conftestfile" \
1794       && test "[$]*" != "X conftestfile $srcdir/configure"; then
1795
1796       # If neither matched, then we have a broken ls.  This can happen
1797       # if, for instance, CONFIG_SHELL is bash and it inherits a
1798       # broken ls alias from the environment.  This has actually
1799       # happened.  Such a system could not be considered "sane".
1800       AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
1801 alias in your environment])
1802    fi
1803
1804    test "[$]2" = conftestfile
1805    )
1806 then
1807    # Ok.
1808    :
1809 else
1810    AC_MSG_ERROR([newly created file is older than distributed files!
1811 Check your system clock])
1812 fi
1813 rm -f conftest*
1814 AC_MSG_RESULT(yes)])
1815
1816 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1817 dnl The program must properly implement --version.
1818 AC_DEFUN(AM_MISSING_PROG,
1819 [AC_MSG_CHECKING(for working $2)
1820 # Run test in a subshell; some versions of sh will print an error if
1821 # an executable is not found, even if stderr is redirected.
1822 # Redirect stdin to placate older versions of autoconf.  Sigh.
1823 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1824    $1=$2
1825    AC_MSG_RESULT(found)
1826 else
1827    $1="$3/missing $2"
1828    AC_MSG_RESULT(missing)
1829 fi
1830 AC_SUBST($1)])
1831
1832 # Add --enable-maintainer-mode option to configure.
1833 # From Jim Meyering
1834
1835 # serial 1
1836
1837 AC_DEFUN(AM_MAINTAINER_MODE,
1838 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1839   dnl maintainer-mode is disabled by default
1840   AC_ARG_ENABLE(maintainer-mode,
1841 [  --enable-maintainer-mode enable make rules and dependencies not useful
1842                           (and sometimes confusing) to the casual installer],
1843       USE_MAINTAINER_MODE=$enableval,
1844       USE_MAINTAINER_MODE=no)
1845   AC_MSG_RESULT($USE_MAINTAINER_MODE)
1846   AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1847   MAINT=$MAINTAINER_MODE_TRUE
1848   AC_SUBST(MAINT)dnl
1849 ]
1850 )
1851
1852 # Define a conditional.
1853
1854 AC_DEFUN(AM_CONDITIONAL,
1855 [AC_SUBST($1_TRUE)
1856 AC_SUBST($1_FALSE)
1857 if $2; then
1858   $1_TRUE=
1859   $1_FALSE='#'
1860 else
1861   $1_TRUE='#'
1862   $1_FALSE=
1863 fi])
1864
1865 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1866
1867 AC_DEFUN(AM_CONFIG_HEADER,
1868 [AC_PREREQ([2.12])
1869 AC_CONFIG_HEADER([$1])
1870 dnl When config.status generates a header, we must update the stamp-h file.
1871 dnl This file resides in the same directory as the config header
1872 dnl that is generated.  We must strip everything past the first ":",
1873 dnl and everything past the last "/".
1874 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1875 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1876 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1877 <<am_indx=1
1878 for am_file in <<$1>>; do
1879   case " <<$>>CONFIG_HEADERS " in
1880   *" <<$>>am_file "*<<)>>
1881     echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1882     ;;
1883   esac
1884   am_indx=`expr "<<$>>am_indx" + 1`
1885 done<<>>dnl>>)
1886 changequote([,]))])
1887