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 ${enableval} for multilib option) ;;
  27    esac], [multilib=yes])dnl
  28
  29   glibcpp_basedir=$auxdir/$1/libstdc++-v3
  30   AC_SUBST(glibcpp_basedir)
  31
  32   AM_INIT_AUTOMAKE(libstdc++, 2.92)
  33
  34   # Never versions of autoconf add an underscore to these functions.
  35   # Prevent future problems ...
  36   ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
  37   ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
  38   ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
  39   ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
  40
  41 #  AC_PROG_CC
  42
  43 # FIXME: We temporarily define our own version of AC_PROG_CC.  This is
  44 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
  45 # are probably using a cross compiler, which will not be able to fully
  46 # link an executable.  This should really be fixed in autoconf
  47 # itself.
  48
  49 AC_DEFUN(LIB_AC_PROG_CC,
  50 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  51 dnl Fool anybody using AC_PROG_CC.
  52 AC_PROVIDE([AC_PROG_CC])
  53 AC_CHECK_PROG(CC, gcc, gcc)
  54 if test -z "$CC"; then
  55   AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  56   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
  57 fi
  58
  59 AC_PROG_CC_GNU
  60
  61 if test $ac_cv_prog_gcc = yes; then
  62   GCC=yes
  63 dnl Check whether -g works, even if CFLAGS is set, in case the package
  64 dnl plays around with CFLAGS (such as to build both debugging and
  65 dnl normal versions of a library), tasteless as that idea is.
  66   ac_test_CFLAGS="${CFLAGS+set}"
  67   ac_save_CFLAGS="$CFLAGS"
  68   CFLAGS=
  69   AC_PROG_CC_G
  70   if test "$ac_test_CFLAGS" = set; then
  71     CFLAGS="$ac_save_CFLAGS"
  72   elif test $ac_cv_prog_cc_g = yes; then
  73     CFLAGS="-g -O2"
  74   else
  75     CFLAGS="-O2"
  76   fi
  77 else
  78   GCC=
  79   test "${CFLAGS+set}" = set || CFLAGS="-g"
  80 fi
  81 ])
  82
  83 LIB_AC_PROG_CC
  84
  85 # Can't just call these here as g++ requires libstc++ to be built....
  86 #  AC_PROG_CXX
  87
  88 # Likewise for AC_PROG_CXX.
  89 AC_DEFUN(LIB_AC_PROG_CXX,
  90 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
  91 dnl Fool anybody using AC_PROG_CXX.
  92 AC_PROVIDE([AC_PROG_CXX])
  93 # Use glibcpp_CXX so that we do not cause CXX to be cached with the
  94 # flags that come in CXX while configuring libstdc++.  They're different
  95 # from those used for all other target libraries.  If CXX is set in
  96 # the environment, respect that here.
  97 glibcpp_CXX=$CXX
  98 AC_CHECK_PROGS(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
  99 AC_SUBST(glibcpp_CXX)
 100 CXX=$glibcpp_CXX
 101 test -z "$glibcpp_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
 102
 103 AC_PROG_CXX_GNU
 104
 105 if test $ac_cv_prog_gxx = yes; then
 106   GXX=yes
 107 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
 108 dnl plays around with CXXFLAGS (such as to build both debugging and
 109 dnl normal versions of a library), tasteless as that idea is.
 110   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 111   ac_save_CXXFLAGS="$CXXFLAGS"
 112   CXXFLAGS=
 113   AC_PROG_CXX_G
 114   if test "$ac_test_CXXFLAGS" = set; then
 115     CXXFLAGS="$ac_save_CXXFLAGS"
 116   elif test $ac_cv_prog_cxx_g = yes; then
 117     CXXFLAGS="-g -O2"
 118   else
 119     CXXFLAGS="-O2"
 120   fi
 121 else
 122   GXX=
 123   test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
 124 fi
 125 ])
 126
 127 LIB_AC_PROG_CXX
 128
 129   AC_CHECK_TOOL(AS, as)
 130   AC_CHECK_TOOL(AR, ar)
 131   AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
 132   AC_PROG_INSTALL
 133
 134   AM_MAINTAINER_MODE
 135
 136   # We need AC_EXEEXT to keep automake happy in cygnus mode.  However,
 137   # at least currently, we never actually build a program, so we never
 138   # need to use $(EXEEXT).  Moreover, the test for EXEEXT normally
 139   # fails, because we are probably configuring with a cross compiler
 140   # which cant create executables.  So we include AC_EXEEXT to keep
 141   # automake happy, but we dont execute it, since we dont care about
 142   # the result.
 143   if false; then
 144     # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
 145     # to nothing, so nothing would remain between `then' and `fi' if it
 146     # were not for the `:' below.
 147     :
 148     AC_EXEEXT
 149   fi
 150
 151   . [$]{glibcpp_basedir}/configure.host
 152
 153   case [$]{glibcpp_basedir} in
 154     /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
 155     *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
 156   esac
 157
 158   # This does for the target what configure.host does for the host.  In
 159   # addition to possibly modifying the same flags, it also sets up symlinks.
 160   GLIBCPP_CHECK_TARGET
 161 ])
 162
 163
 164 dnl
 165 dnl Check to see if g++ can compile this library, and if so, if any version-
 166 dnl specific precautions need to be taken.
 167 dnl
 168 dnl GLIBCPP_CHECK_COMPILER_VERSION
 169 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
 170 if test ! -f stamp-sanity-compiler; then
 171   AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
 172   AC_LANG_SAVE
 173   AC_LANG_CPLUSPLUS
 174   AC_EGREP_CPP(ok, [
 175   #if __GNUC__ >= 3
 176     ok
 177   #endif
 178   ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
 179   AC_LANG_RESTORE
 180   AC_MSG_RESULT($gpp_satisfactory)
 181   touch stamp-sanity-compiler
 182 fi
 183 ])
 184
 185
 186 dnl
 187 dnl Test for newer compiler features, or features that are present in newer
 188 dnl compiler version but not older compiler versions should be placed
 189 dnl here.
 190 dnl
 191 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
 192 dnl new inlining code or the new system_header pragma will die on -Werror.
 193 dnl Leave it out by default and use maint-mode to use it.
 194 dnl
 195 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
 196 dnl compiler supports it and the user has not requested debug mode.
 197 dnl
 198 dnl GLIBCPP_CHECK_COMPILER_FEATURES
 199 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
 200   # All these tests are for C++; save the language and the compiler flags.
 201   # The CXXFLAGS thing is suspicious, but based on similar bits
 202   # found in GLIBCPP_CONFIGURE.
 203   AC_LANG_SAVE
 204   AC_LANG_CPLUSPLUS
 205   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 206   ac_save_CXXFLAGS="$CXXFLAGS"
 207
 208   # Check for maintainer-mode bits.
 209   if test x"$USE_MAINTAINER_MODE" = xno; then
 210     WERROR=''
 211   else
 212     WERROR='-Werror'
 213   fi
 214
 215   # Check for -ffunction-sections -fdata-sections
 216   AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
 217   CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
 218   AC_TRY_COMPILE(, [int foo;
 219   ], [ac_fdsections=yes], [ac_fdsections=no])
 220   if test "$ac_test_CXXFLAGS" = set; then
 221     CXXFLAGS="$ac_save_CXXFLAGS"
 222   else
 223     # this is the suspicious part
 224     CXXFLAGS=''
 225   fi
 226   if test x"$ac_fdsections" = x"yes" && test x"$enable_debug" = x"no"; then
 227     SECTION_FLAGS='-ffunction-sections -fdata-sections'
 228   fi
 229   AC_MSG_RESULT($ac_fdsections)
 230
 231   AC_LANG_RESTORE
 232   AC_SUBST(WERROR)
 233   AC_SUBST(SECTION_FLAGS)
 234 ])
 235
 236
 237 dnl
 238 dnl If GNU ld is in use, check to see if tricky linker opts can be used.  If
 239 dnl the native linker is in use, all variables will be defined to something
 240 dnl safe (like an empty string).
 241 dnl
 242 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
 243 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
 244 dnl
 245 dnl GLIBCPP_CHECK_LINKER_FEATURES
 246 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
 247   # If we're not using GNU ld, then there's no point in even trying these
 248   # tests.  Check for that first.  We should have already tested for gld
 249   # by now (in libtool), but require it now just to be safe...
 250   SECTION_LDFLAGS=''
 251   OPT_LDFLAGS=''
 252   AC_REQUIRE([AC_PROG_LD])
 253
 254   # Set --gc-sections.
 255   if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
 256     # GNU ld it is!  Joy and bunny rabbits!
 257
 258     # All these tests are for C++; save the language and the compiler flags.
 259     # Need to do this so that g++ won't try to link in libstdc++
 260     ac_test_CFLAGS="${CFLAGS+set}"
 261     ac_save_CFLAGS="$CFLAGS"
 262     CFLAGS='-x c++  -Wl,--gc-sections'
 263
 264     # Check for -Wl,--gc-sections
 265     # XXX This test is broken at the moment, as symbols required for
 266     # linking are now in libsupc++ (not built yet.....). In addition,
 267     # this test has cored on solaris in the past. In addition,
 268     # --gc-sections doesn't really work at the moment (keeps on discarding
 269     # used sections, first .eh_frame and now some of the glibc sections for
 270     # iconv). Bzzzzt. Thanks for playing, maybe next time.
 271     AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
 272     AC_TRY_RUN([
 273      int main(void)
 274      {
 275        try { throw 1; }
 276        catch (...) { };
 277        return 0;
 278      }
 279     ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
 280     if test "$ac_test_CFLAGS" = set; then
 281       CFLAGS="$ac_save_CFLAGS"
 282     else
 283       # this is the suspicious part
 284       CFLAGS=''
 285     fi
 286     if test "$ac_sectionLDflags" = "yes"; then
 287       SECTION_LDFLAGS='-Wl,--gc-sections'
 288     fi
 289     AC_MSG_RESULT($ac_sectionLDflags)
 290   fi
 291
 292   # Set linker optimization flags.
 293   if test x"$ac_cv_prog_gnu_ld" = x"yes" && test x"$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 ONE parameter
 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 ONE parameter
 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
 659   dnl Check to see if basic C math functions have float versions.
 660   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
 661                                           float_trig,
 662                                           acosf asinf atanf \
 663                                           cosf sinf tanf \
 664                                           coshf sinhf tanhf)
 665   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
 666                                           float_round,
 667                                           ceilf floorf)
 668   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
 669   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
 670   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
 671   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
 672   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
 673   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
 674   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
 675   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
 676   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
 677   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
 678   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
 679   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
 680   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
 681
 682   dnl Check to see if basic C math functions have long double versions.
 683   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
 684                                           long_double_trig,
 685                                           acosl asinl atanl \
 686                                           cosl sinl tanl \
 687                                           coshl sinhl tanhl)
 688   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
 689                                           long_double_round,
 690                                           ceill floorl)
 691   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
 692   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
 693   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
 694   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
 695   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
 696   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
 697   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
 698   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
 699   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
 700   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
 701   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
 702   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
 703   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
 704   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
 705   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
 706   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
 707
 708   dnl Some runtimes have these functions with a preceding underscore. Please
 709   dnl keep this sync'd with the one above. And if you add any new symbol,
 710   dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
 711   dnl Check to see if certain C math functions exist.
 712
 713   dnl Check to see if basic C math functions have float versions.
 714   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
 715                                           _float_trig,
 716                                           _acosf _asinf _atanf \
 717                                           _cosf _sinf _tanf \
 718                                           _coshf _sinhf _tanhf)
 719   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
 720                                           _float_round,
 721                                           _ceilf _floorf)
 722
 723   dnl Check to see if basic C math functions have long double versions.
 724   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
 725                                           _long_double_trig,
 726                                           _acosl _asinl _atanl \
 727                                           _cosl _sinl _tanl \
 728                                           _coshl _sinhl _tanhl)
 729   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
 730                                           _long_double_round,
 731                                           _ceill _floorl)
 732
 733   LIBS="$ac_save_LIBS"
 734   CXXFLAGS="$ac_save_CXXFLAGS"
 735 ])
 736
 737
 738 dnl
 739 dnl Check to see if there is native support for complex
 740 dnl
 741 dnl Don't compile bits in math/* if native support exits.
 742 dnl
 743 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
 744 dnl
 745 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 746 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
 747   dnl Check for complex versions of math functions of platform.
 748   AC_CHECK_LIB(m, main)
 749   AC_REPLACE_MATHFUNCS(nan hypot hypotf atan2f expf copysignf)
 750
 751   dnl Compile the long double complex functions only if the function
 752   dnl provides the non-complex long double functions that are needed.
 753   dnl Currently this includes copysignl and atan2l, which should be
 754   dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
 755   USE_COMPLEX_LONG_DOUBLE=no
 756   if test x$ac_cv_func_atan2l = x"yes" \
 757      && test x$ac_cv_func_copysignl = x"yes"; then
 758     USE_COMPLEX_LONG_DOUBLE=yes
 759     AC_REPLACE_MATHFUNCS(hypotl signbitl)
 760   fi
 761
 762   AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
 763 ])
 764
 765
 766 dnl Check to see what architecture and operating system we are compiling
 767 dnl for.  Also, if architecture- or OS-specific flags are required for
 768 dnl compilation, pick them up here.
 769 dnl
 770 dnl GLIBCPP_CHECK_TARGET
 771 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
 772     . [$]{glibcpp_basedir}/configure.target
 773     AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
 774     AC_MSG_RESULT(OS config directory is $os_include_dir)
 775     AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
 776 ])
 777
 778
 779 dnl
 780 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
 781 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled.  (This
 782 dnl must have been previously checked.)
 783 dnl
 784 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
 785 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
 786 dnl
 787 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
 788 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
 789
 790   dnl Test wchar.h for mbstate_t, which is needed for char_traits and
 791   dnl others even if wchar_t support is not on.
 792   AC_MSG_CHECKING([for mbstate_t])
 793   AC_TRY_COMPILE([#include <wchar.h>],
 794   [mbstate_t teststate;],
 795   have_mbstate_t=yes, have_mbstate_t=no)
 796   AC_MSG_RESULT($have_mbstate_t)
 797   if test x"$have_mbstate_t" = xyes; then
 798     AC_DEFINE(HAVE_MBSTATE_T)
 799   fi
 800
 801   dnl Sanity check for existence of ISO C99 headers for extended encoding.
 802   AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
 803   AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
 804
 805   dnl Only continue checking if the ISO C99 headers exist and support is on.
 806   if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes \
 807      && test x"$enable_c_mbchar" != xno; then
 808
 809     dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
 810     dnl numeric_limits can instantiate type_traits<wchar_t>
 811     AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
 812     AC_TRY_COMPILE([#include <wchar.h>],
 813     [int i = WCHAR_MIN; int j = WCHAR_MAX;],
 814     has_wchar_minmax=yes, has_wchar_minmax=no)
 815     AC_MSG_RESULT($has_wchar_minmax)
 816
 817     dnl Test wchar.h for WEOF, which is what we use to determine whether
 818     dnl to specialize for char_traits<wchar_t> or not.
 819     AC_MSG_CHECKING([for WEOF])
 820     AC_TRY_COMPILE([
 821       #include <wchar.h>
 822       #include <stddef.h>],
 823     [wint_t i = WEOF;],
 824     has_weof=yes, has_weof=no)
 825     AC_MSG_RESULT($has_weof)
 826
 827     dnl Tests for wide character functions used in char_traits<wchar_t>.
 828     ac_wfuncs=yes
 829     AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
 830     ac_wfuncs=no)
 831
 832     dnl Checks for names injected into std:: by the c_std headers.
 833     AC_CHECK_FUNCS(btowc wctob fgetwc fgetwc fgetws fputwc fputws fwide \
 834     fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
 835     vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
 836     mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
 837     wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
 838     wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
 839     ac_wfuncs=no)
 840
 841     AC_MSG_CHECKING([for ISO C99 wchar_t support])
 842     if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
 843        && test x"$ac_wfuncs" = xyes; then
 844       ac_isoC99_wchar_t=yes
 845     else
 846       ac_isoC99_wchar_t=no
 847     fi
 848     AC_MSG_RESULT($ac_isoC99_wchar_t)
 849
 850     dnl Use iconv for wchar_t to char conversions. As such, check for
 851     dnl X/Open Portability Guide, version 2 features (XPG2).
 852     AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
 853     AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
 854
 855     dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
 856     AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
 857     ac_save_LIBS="$LIBS"
 858     LIBS="$LIBS $libiconv"
 859
 860     AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
 861     ac_XPG2funcs=yes, ac_XPG2funcs=no)
 862
 863     LIBS="$ac_save_LIBS"
 864
 865     AC_MSG_CHECKING([for XPG2 wchar_t support])
 866     if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
 867        && test x"$ac_XPG2funcs" = xyes; then
 868       ac_XPG2_wchar_t=yes
 869     else
 870       ac_XPG2_wchar_t=no
 871     fi
 872     AC_MSG_RESULT($ac_XPG2_wchar_t)
 873
 874     dnl At the moment, only enable wchar_t specializations if all the
 875     dnl above support is present.
 876     AC_MSG_CHECKING([for enabled wchar_t specializations])
 877     if test x"$ac_isoC99_wchar_t" = xyes \
 878     && test x"$ac_XPG2_wchar_t" = xyes; then
 879       AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
 880       AC_MSG_RESULT("yes")
 881     else
 882       AC_MSG_RESULT("no")
 883     fi
 884   else
 885     dnl Wide characters disabled by the user.
 886     AC_MSG_WARN([wchar_t support disabled.])
 887   fi
 888 ])
 889
 890
 891 dnl
 892 dnl Check for special debugging mode; not for production use.
 893 dnl
 894 dnl GLIBCPP_ENABLE_DEBUG
 895 dnl --enable-debug sets '-ggdb3 -O0'.
 896 dnl --disable-debug sets '-g' and whatever optimization options the
 897 dnl     compiler can handle.
 898 dnl  +  --enable-maintainer-mode automatically defaults this to on.
 899 dnl  +  Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
 900 dnl  +  Usage:  GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
 901 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
 902 dnl       defaults to `no'.
 903 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
 904 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
 905 AC_ARG_ENABLE(debug,
 906 changequote(<<, >>)dnl
 907 <<  --enable-debug          extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
 908 changequote([, ])dnl
 909 [case "${enableval}" in
 910  yes) enable_debug=yes ;;
 911  no)  enable_debug=no ;;
 912  *)   AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
 913  esac],
 914 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
 915
 916 dnl Option parsed, now set things appropriately
 917 case "${enable_debug}" in
 918     yes)
 919         DEBUG_FLAGS='-O0 -ggdb3'
 920         ;;
 921     no)
 922         DEBUG_FLAGS='-g'
 923         ;;
 924 esac
 925 AC_SUBST(DEBUG_FLAGS)
 926 ])
 927
 928
 929 dnl
 930 dnl Check for "unusual" flags to pass to the compiler while building.
 931 dnl
 932 dnl GLIBCPP_ENABLE_CXX_FLAGS
 933 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
 934 dnl     experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
 935 dnl     Somehow this same set of flags must be passed when [re]building
 936 dnl     libgcc.
 937 dnl --disable-cxx-flags passes nothing.
 938 dnl  +  See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
 939 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
 940 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
 941 dnl  +  Usage:  GLIBCPP_ENABLE_CXX_FLAGS(default flags)
 942 dnl       If "default flags" is an empty string (or "none"), the effect is
 943 dnl       the same as --disable or --enable=no.
 944 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
 945 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
 946 AC_ARG_ENABLE(cxx-flags,
 947 changequote(<<, >>)dnl
 948 <<  --enable-cxx-flags=FLAGS      pass compiler FLAGS when building library;
 949                                 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
 950 changequote([, ])dnl
 951 [case "x$enableval" in
 952  xyes)
 953         AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
 954  xno|x)
 955         enable_cxx_flags='' ;;
 956  *)
 957         enable_cxx_flags="$enableval" ;;
 958  esac],
 959 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
 960
 961 dnl Thinko on my part during design.  This kludge is the workaround.
 962 if test "$enable_cxx_flags" = "none"; then
 963   enable_cxx_flags='';
 964 fi
 965
 966 dnl Run through flags (either default or command-line) and set anything
 967 dnl extra (e.g., #defines) that must accompany particular g++ options.
 968 if test -n "$enable_cxx_flags"; then
 969     for f in $enable_cxx_flags; do
 970         case "$f" in
 971             -fhonor-std)  ;;
 972             -*)  ;;
 973             *)   # and we're trying to pass /what/ exactly?
 974                  AC_MSG_ERROR([compiler flags start with a -]) ;;
 975         esac
 976     done
 977 fi
 978 EXTRA_CXX_FLAGS="$enable_cxx_flags"
 979 AC_SUBST(EXTRA_CXX_FLAGS)
 980 ])
 981
 982
 983 dnl
 984 dnl Check for which locale library to use:  gnu or generic.
 985 dnl
 986 dnl GLIBCPP_ENABLE_CLOCALE
 987 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
 988 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
 989 dnl
 990 dnl default is generic
 991 dnl
 992 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
 993   AC_MSG_CHECKING([for clocale to use])
 994   AC_ARG_ENABLE(clocale,
 995   [  --enable-clocale        enable model for target locale package.
 996   --enable-clocale=MODEL  use MODEL target-speific locale package. [default=generic]
 997   ],
 998   if test x$enable_clocale = xno; then
 999      enable_clocale=generic
1000   fi,
1001      enable_clocale=generic)
1002
1003   enable_clocale_flag=$enable_clocale
1004
1005   dnl Check if a valid locale package
1006   case x${enable_clocale_flag} in
1007     xgnu)
1008       CLOCALE_H=config/c_locale_gnu.h
1009       CLOCALE_CC=config/c_locale_gnu.cc
1010       AC_MSG_RESULT(gnu)
1011       ;;
1012     xgeneric)
1013       CLOCALE_H=config/c_locale_generic.h
1014       CLOCALE_CC=config/c_locale_generic.cc
1015       AC_MSG_RESULT(generic)
1016       ;;
1017     *)
1018       echo "$enable_clocale is an unknown locale package" 1>&2
1019       exit 1
1020       ;;
1021   esac
1022
1023   AC_LINK_FILES($CLOCALE_H, include/bits/c++locale.h)
1024   AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1025 ])
1026
1027
1028 dnl
1029 dnl Check for which I/O library to use:  libio, or something specific.
1030 dnl
1031 dnl GLIBCPP_ENABLE_CSTDIO
1032 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1033 dnl
1034 dnl default is stdio
1035 dnl
1036 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1037   AC_MSG_CHECKING([for cstdio to use])
1038   AC_ARG_ENABLE(cstdio,
1039   [  --enable-cstdio         enable stdio for target io package.
1040   --enable-cstdio=LIB     use LIB target-speific io package. [default=stdio]
1041   ],
1042   if test x$enable_cstdio = xno; then
1043      enable_cstdio=stdio
1044   fi,
1045      enable_cstdio=stdio)
1046
1047   enable_cstdio_flag=$enable_cstdio
1048
1049   dnl Check if a valid I/O package
1050   case x${enable_cstdio_flag} in
1051     xlibio)
1052       CSTDIO_H=config/c_io_libio.h
1053       BASIC_FILE_H=config/basic_file_libio.h
1054       BASIC_FILE_CC=config/basic_file_libio.cc
1055       AC_MSG_RESULT(libio)
1056
1057       # see if we are on a system with libio native (ie, linux)
1058       AC_CHECK_HEADER(libio.h,  has_libio=yes, has_libio=no)
1059
1060       # Need to check and see what version of glibc is being used. If
1061       # it's not glibc-2.2 or higher, then we'll need to go ahead and
1062       # compile most of libio for linux systems.
1063       if test x$has_libio = x"yes"; then
1064         case "$target" in
1065           *-*-linux*)
1066               AC_MSG_CHECKING([for glibc version >= 2.2])
1067               AC_EGREP_CPP([ok], [
1068             #include <features.h>
1069               #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1070                     ok
1071               #endif
1072               ], glibc_satisfactory=yes, glibc_satisfactory=no)
1073               AC_MSG_RESULT($glibc_satisfactory)
1074             ;;
1075         esac
1076
1077         # XXX at the moment, admit defeat and force the recompilation
1078         # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1079         glibc_satisfactory=no
1080
1081         if test x$glibc_satisfactory = x"yes"; then
1082            need_libio=no
1083            need_wlibio=no
1084         else
1085            need_libio=yes
1086            # bkoz XXX need to add checks to enable this
1087            # pme XXX here's a first pass at such a check
1088            if test x$enable_c_mbchar != xno; then
1089               need_wlibio=yes
1090            else
1091               need_wlibio=no
1092            fi
1093         fi
1094
1095       else
1096          # Using libio, but <libio.h> doesn't exist on the target system. . .
1097          need_libio=yes
1098          # bkoz XXX need to add checks to enable this
1099          # pme XXX here's a first pass at such a check
1100          if test x$enable_c_mbchar != xno; then
1101              need_wlibio=yes
1102          else
1103              need_wlibio=no
1104          fi
1105       fi
1106       ;;
1107     xstdio | x | xno | xnone | xyes)
1108       # default
1109       CSTDIO_H=config/c_io_stdio.h
1110       BASIC_FILE_H=config/basic_file_stdio.h
1111       BASIC_FILE_CC=config/basic_file_stdio.cc
1112       AC_MSG_RESULT(stdio)
1113
1114       # We're not using stdio.
1115       need_libio=no
1116       need_wlibio=no
1117       ;;
1118     *)
1119       echo "$enable_cstdio is an unknown io package" 1>&2
1120       exit 1
1121       ;;
1122   esac
1123   AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1124   AC_LINK_FILES($BASIC_FILE_H, include/bits/basic_file_model.h)
1125   AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1126
1127   # 2000-08-04 bkoz hack
1128   CCODECVT_C=config/c_io_libio_codecvt.c
1129   AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1130   # 2000-08-04 bkoz hack
1131
1132   AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1133                  test "$need_libio" = yes || test "$need_wlibio" = yes)
1134   AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1135   AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1136   if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1137     libio_la=../libio/libio.la
1138   else
1139     libio_la=
1140   fi
1141   AC_SUBST(libio_la)
1142 ])
1143
1144
1145 dnl
1146 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1147 dnl We must stage the required headers so that they will be installed
1148 dnl with the library (unlike libgcc, the STL implementation is provided
1149 dnl solely within headers).  Since we must not inject random user-space
1150 dnl macro names into user-provided C++ code, we first stage into <file>-in
1151 dnl and process to <file> with an output command.  The reason for a two-
1152 dnl stage process here is to correctly handle $srcdir!=$objdir without
1153 dnl having to write complex code (the sed commands to clean the macro
1154 dnl namespace are complex and fragile enough as it is).
1155 dnl
1156 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1157   AC_MSG_CHECKING([for thread model used by GCC])
1158   target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1159   AC_MSG_RESULT([$target_thread_file])
1160
1161   AC_LINK_FILES(../gcc/gthr.h, include/bits/gthr.h-in)
1162   AC_LINK_FILES(../gcc/gthr-single.h, include/bits/gthr-single.h-in)
1163   AC_LINK_FILES(../gcc/gthr-$target_thread_file.h,
1164                 include/bits/gthr-default.h-in)
1165   if test $target_thread_file != single; then
1166     AC_DEFINE(HAVE_GTHR_DEFAULT)
1167     AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1168   fi
1169   AC_OUTPUT_COMMANDS([d=include/bits
1170     rm -f $d/gthr.h $d/gthr-single.h $d/gthr-default.h
1171     sed '/^#/s/\([A-Z_][A-Z_]*\)/_GLIBCPP_\1/g' <$d/gthr.h-in >$d/gthr.h
1172     sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-single.h-in \
1173       | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' >$d/gthr-single.h
1174     sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-default.h-in \
1175       | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' \
1176       | sed 's/\([A-Z_]*WEAK\)/_GLIBCPP_\1/g' >$d/gthr-default.h])
1177 ])
1178
1179
1180 dnl
1181 dnl Check for exception handling support.  If an explicit enable/disable
1182 dnl sjlj exceptions is given, we don't have to detect.  Otherwise the
1183 dnl target may or may not support call frame exceptions.
1184 dnl
1185 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1186 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1187 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1188 dnl
1189 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1190 dnl
1191 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1192   AC_MSG_CHECKING([for exception model to use])
1193   AC_LANG_SAVE
1194   AC_LANG_CPLUSPLUS
1195   AC_ARG_ENABLE(sjlj-exceptions,
1196   [  --enable-sjlj-exceptions  force use of builtin_setjmp for exceptions],
1197   [:],
1198   [dnl Botheration.  Now we've got to detect the exception model.
1199    dnl Link tests against libgcc.a are problematic since -- at least
1200    dnl as of this writing -- we've not been given proper -L bits for
1201    dnl single-tree newlib and libgloss.
1202    dnl
1203    dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1204    dnl conftest files before we got a change to grep them first.
1205    cat > conftest.$ac_ext << EOF
1206 [#]line __oline__ "configure"
1207 struct S { ~S(); };
1208 void bar();
1209 void foo()
1210 {
1211   S s;
1212   bar();
1213 }
1214 EOF
1215    old_CXXFLAGS="$CXXFLAGS"
1216    CXXFLAGS=-S
1217    if AC_TRY_EVAL(ac_compile); then
1218      if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1219        enable_sjlj_exceptions=yes
1220      elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1221        enable_sjlj_exceptions=no
1222      fi
1223    fi
1224    CXXFLAGS="$old_CXXFLAGS"
1225    rm -f conftest*])
1226    if test x$enable_sjlj_exceptions = xyes; then
1227      AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1228         [Define if the compiler is configured for setjmp/longjmp exceptions.])
1229      ac_exception_model_name=sjlj
1230    elif test x$enable_sjlj_exceptions = xno; then
1231      ac_exception_model_name="call frame"
1232    else
1233      AC_MSG_ERROR([unable to detect exception model])
1234    fi
1235    AC_LANG_RESTORE
1236    AC_MSG_RESULT($ac_exception_model_name)
1237 ])
1238
1239
1240 dnl
1241 dnl Check for ISO/IEC 9899:1999 "C99" support.
1242 dnl
1243 dnl GLIBCPP_ENABLE_C99
1244 dnl --enable-c99 defines _GLIBCPP_USE_C99
1245 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1246 dnl  +  Usage:  GLIBCPP_ENABLE_C99[(DEFAULT)]
1247 dnl       Where DEFAULT is either `yes' or `no'.  If omitted, it
1248 dnl       defaults to `no'.
1249 dnl  +  If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1250 dnl
1251 dnl GLIBCPP_ENABLE_C99
1252 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1253   define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1254
1255   AC_ARG_ENABLE(c99,
1256   changequote(<<, >>)dnl
1257   <<--enable-c99      turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1258   changequote([, ])dnl
1259   [case "$enableval" in
1260    yes) enable_c99=yes ;;
1261    no)  enable_c99=no ;;
1262    *)   AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1263    esac],
1264   enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1265
1266   AC_LANG_SAVE
1267   AC_LANG_CPLUSPLUS
1268
1269   # Check for the existence of <math.h> functions used if C99 is enabled.
1270   ac_c99_math=yes;
1271   AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1272   AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1273   AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1274   AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1275   AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1276   AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1277   AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1278   AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1279   AC_TRY_COMPILE([#include <math.h>],
1280                  [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1281   AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1282   AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1283   AC_TRY_COMPILE([#include <math.h>],
1284                  [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1285   AC_TRY_COMPILE([#include <math.h>],
1286                  [isunordered(0.0,0.0);],, [ac_c99_math=no])
1287   AC_MSG_RESULT($ac_c99_math)
1288
1289   # Check for the existence in <stdio.h> of vscanf, et. al.
1290   ac_c99_stdio=yes;
1291   AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1292   AC_TRY_COMPILE([#include <stdio.h>],
1293                  [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1294   AC_TRY_COMPILE([#include <stdio.h>
1295                   #include <stdarg.h>
1296                   void foo(char* fmt, ...)
1297                   {va_list args; va_start(args, fmt);
1298                   vfscanf(stderr, "%i", args);}],
1299                   [],, [ac_c99_stdio=no])
1300   AC_TRY_COMPILE([#include <stdio.h>
1301                   #include <stdarg.h>
1302                   void foo(char* fmt, ...)
1303                   {va_list args; va_start(args, fmt);
1304                   vscanf("%i", args);}],
1305                   [],, [ac_c99_stdio=no])
1306   AC_TRY_COMPILE([#include <stdio.h>
1307                   #include <stdarg.h>
1308                   void foo(char* fmt, ...)
1309                   {va_list args; va_start(args, fmt);
1310                   vsnprintf(fmt, 0, "%i", args);}],
1311                   [],, [ac_c99_stdio=no])
1312   AC_TRY_COMPILE([#include <stdio.h>
1313                   #include <stdarg.h>
1314                   void foo(char* fmt, ...)
1315                   {va_list args; va_start(args, fmt);
1316                   vsscanf(fmt, "%i", args);}],
1317                   [],, [ac_c99_stdio=no])
1318   AC_MSG_RESULT($ac_c99_stdio)
1319
1320   # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1321   ac_c99_stdlib=yes;
1322   AC_MSG_CHECKING([for lldiv_t declaration])
1323   AC_CACHE_VAL(ac_c99_lldiv_t, [
1324   AC_TRY_COMPILE([#include <stdlib.h>],
1325                    [ lldiv_t mydivt;],
1326                    [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1327   ])
1328   AC_MSG_RESULT($ac_c99_lldiv_t)
1329
1330   AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1331   AC_TRY_COMPILE([#include <stdlib.h>],
1332                  [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1333   AC_TRY_COMPILE([#include <stdlib.h>],
1334                  [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1335   AC_TRY_COMPILE([#include <stdlib.h>],
1336                  [char* tmp; strtoll("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1337   AC_TRY_COMPILE([#include <stdlib.h>],
1338                  [char* tmp; strtoull("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1339   AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1340   AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1341   AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1342   AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1343   if test x"$ac_c99_lldiv_t" = x"no"; then
1344     ac_c99_stdlib=no;
1345   fi;
1346   AC_MSG_RESULT($ac_c99_stdlib)
1347
1348   # Check for the existence of <wchar.h> functions used if C99 is enabled.
1349   # XXX the wchar.h checks should be rolled into the general C99 bits.
1350   ac_c99_wchar=yes;
1351   AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1352   AC_TRY_COMPILE([#include <wchar.h>],
1353                  [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1354   AC_TRY_COMPILE([#include <wchar.h>],
1355                  [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1356   AC_TRY_COMPILE([#include <wchar.h>],
1357                  [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1358   AC_MSG_RESULT($ac_c99_wchar)
1359
1360   AC_MSG_CHECKING([for enabled ISO C99 support])
1361   if test x"$ac_c99_math" = x"no" || test x"$ac_c99_stdio" = x"no" \
1362       || test x"$ac_c99_stdlib" = x"no" \
1363       || test x"$ac_c99_wchar" = x"no"; then
1364     enable_c99=no;
1365   fi;
1366   AC_MSG_RESULT($enable_c99)
1367
1368   # Option parsed, now set things appropriately
1369   if test x"$enable_c99" = x"yes"; then
1370     AC_DEFINE(_GLIBCPP_USE_C99)
1371   fi
1372
1373   AC_LANG_RESTORE
1374 ])
1375
1376
1377 dnl
1378 dnl Check for template specializations for the 'long long' type extension.
1379 dnl NB: Must check for C99 support before calling _GLIBCPP_ENABLE_LONG_LONG
1380 dnl
1381 dnl GLIBCPP_ENABLE_LONG_LONG
1382 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1383 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1384 dnl  +  Usage:  GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1385 dnl       Where DEFAULT is either `yes' or `no'.  If omitted, it
1386 dnl       defaults to `no'.
1387 dnl  +  If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1388 dnl
1389 dnl GLIBCPP_ENABLE_LONG_LONG
1390 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1391   define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1392
1393   AC_ARG_ENABLE(long-long,
1394   changequote(<<, >>)dnl
1395   <<--enable-long-long      turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1396   changequote([, ])dnl
1397   [case "$enableval" in
1398    yes) enable_long_long=yes ;;
1399    no)  enable_long_long=no ;;
1400    *)   AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1401    esac],
1402   enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1403
1404   # iostreams require strtoll, strtoull to compile. If the
1405   # GLIBCPP_ENABLE_C99 tests found these, and if C99 support is enabled,
1406   # go ahead and allow long long to be used.
1407   if test x"$enable_c99" = x"no"; then
1408     enable_long_long=no;
1409   fi
1410
1411   # Option parsed, now set things appropriately
1412   AC_MSG_CHECKING([for enabled long long support])
1413   if test x"$enable_long_long" = xyes; then
1414     AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1415   fi
1416   AC_MSG_RESULT($enable_long_long)
1417 ])
1418
1419
1420 dnl
1421 dnl Check for what kind of C headers to use.
1422 dnl
1423 dnl GLIBCPP_ENABLE_CHEADERS
1424 dnl --enable-cheaders= [does stuff].
1425 dnl --disable-cheaders [does not do anything, really].
1426 dnl  +  This will eventually need to be 'c_shadow' by default.
1427 dnl  +  Usage:  GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1428 dnl       Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1429 dnl       If ommitted, it defaults to `c_std'.
1430 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1431 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1432 AC_MSG_CHECKING([for c header strategy to use])
1433 AC_ARG_ENABLE(cheaders,
1434 changequote(<<, >>)dnl
1435 <<  --enable-cheaders       construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1436 changequote([, ])
1437   [case "$enableval" in
1438    c)
1439         enable_cheaders=c
1440         ;;
1441    c_std)
1442         enable_cheaders=c_std
1443         ;;
1444    c_shadow)
1445         enable_cheaders=c_shadow
1446         ;;
1447    *)   AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1448         ;;
1449   esac],
1450   enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1451   AC_MSG_RESULT($enable_cheaders)
1452
1453   dnl Option parsed, now set things appropriately
1454   case "$enable_cheaders" in
1455     c_shadow)
1456         CSHADOW_FLAGS="-fno-builtin"
1457         C_INCLUDE_DIR='${top_srcdir}/include/c_shadow'
1458         AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1459         ;;
1460     c_std)
1461         CSHADOW_FLAGS=""
1462         C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1463         ;;
1464     c)
1465         CSHADOW_FLAGS=""
1466         C_INCLUDE_DIR='${top_srcdir}/include/c'
1467         ;;
1468   esac
1469
1470   AC_SUBST(CSHADOW_FLAGS)
1471   AC_SUBST(C_INCLUDE_DIR)
1472   AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1473 ])
1474
1475
1476 dnl
1477 dnl Check for wide character support.  Has the same effect as the option
1478 dnl in gcc's configure, but in a form that autoconf can mess with.
1479 dnl
1480 dnl GLIBCPP_ENABLE_C_MBCHAR
1481 dnl --enable-c-mbchar requests all the wchar_t stuff.
1482 dnl --disable-c-mbchar doesn't.
1483 dnl  +  Usage:  GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1484 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1485 dnl       defaults to `no'.
1486 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1487 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1488 AC_ARG_ENABLE(c-mbchar,
1489 changequote(<<, >>)dnl
1490 <<  --enable-c-mbchar       enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1491 changequote([, ])dnl
1492 [case "$enableval" in
1493  yes) enable_c_mbchar=yes ;;
1494  no)  enable_c_mbchar=no ;;
1495  *)   AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1496  esac],
1497 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1498 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1499 ])
1500
1501
1502 dnl
1503 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1504 dnl
1505 dnl GLIBCPP_INCLUDE_DIR
1506 dnl C_INCLUDE_DIR
1507 dnl TOPLEVEL_INCLUDES
1508 dnl LIBMATH_INCLUDES
1509 dnl LIBSUPCXX_INCLUDES
1510 dnl LIBIO_INCLUDES
1511 dnl CSHADOW_INCLUDES
1512 dnl
1513 dnl GLIBCPP_EXPORT_INCLUDE
1514 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1515   # Root level of the include sources.
1516   GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1517
1518   # Can either use include/c or include/c_std to grab "C" headers. This
1519   # variable is set to the include directory currently in use.
1520   # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_CHEADERS
1521
1522   # Passed down for canadian crosses.
1523   if  test x"$CANADIAN" = xyes; then
1524     TOPLEVEL_INCLUDES='-I$(includedir)'
1525   fi
1526
1527   LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1528
1529   LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1530
1531   #if GLIBCPP_NEED_LIBIO
1532   LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1533   #else
1534   #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1535   #endif
1536
1537   #if GLIBCPP_USE_CSHADOW
1538   #  CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1539   #                   -I$(top_blddir)/cshadow'
1540   #else
1541   CSTD_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1542   #endif
1543
1544   # Now, export this to all the little Makefiles....
1545   AC_SUBST(GLIBCPP_INCLUDE_DIR)
1546   AC_SUBST(TOPLEVEL_INCLUDES)
1547   AC_SUBST(LIBMATH_INCLUDES)
1548   AC_SUBST(LIBSUPCXX_INCLUDES)
1549   AC_SUBST(LIBIO_INCLUDES)
1550   AC_SUBST(CSTD_INCLUDES)
1551 ])
1552
1553
1554 dnl
1555 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1556 dnl
1557 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1558   # Optimization flags that are probably a good idea for thrill-seekers. Just
1559   # uncomment the lines below and make, everything else is ready to go...
1560   # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1561   OPTIMIZE_CXXFLAGS=
1562   AC_SUBST(OPTIMIZE_CXXFLAGS)
1563
1564   WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1565   AC_SUBST(WARN_FLAGS)
1566 ])
1567
1568 dnl
1569 dnl  GLIBCPP_EXPORT_INSTALL_INFO
1570 dnl  calculates gxx_install_dir
1571 dnl  exports glibcpp_toolexecdir
1572 dnl  exports glibcpp_toolexeclibdir
1573 dnl  exports glibcpp_builddir
1574 dnl  exports glibcpp_srcdir
1575 dnl  exports glibcpp_prefixdir
1576 dnl
1577 dnl Assumes cross_compiling bits already done, and with_cross_host in
1578 dnl particular
1579 dnl
1580 dnl GLIBCPP_EXPORT_INSTALL_INFO
1581 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1582
1583 glibcpp_toolexecdir=no
1584 glibcpp_toolexeclibdir=no
1585
1586 # Export build and source directories.
1587 # These need to be absolute paths, yet at the same time need to
1588 # canonicalize only relative paths, because then amd will not unmount
1589 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
1590 glibcpp_builddir=`pwd`
1591 case $srcdir in
1592 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
1593 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
1594 esac
1595 glibcpp_prefixdir=${prefix}
1596
1597 AC_MSG_CHECKING([for interface version number])
1598 libstdcxx_interface=$INTERFACE
1599 AC_MSG_RESULT($libstdcxx_interface)
1600
1601 # Process the option --with-gxx-include-dir=<path to include-files directory>
1602 AC_MSG_CHECKING([for --with-gxx-include-dir])
1603 AC_ARG_WITH(gxx-include-dir,
1604 [  --with-gxx-include-dir  the installation directory for include files],
1605 [case "${withval}" in
1606   yes)
1607     AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1608     gxx_include_dir=no
1609     ;;
1610   no)
1611     gxx_include_dir=no
1612     ;;
1613   *)
1614     gxx_include_dir=${withval}
1615     ;;
1616 esac], [gxx_include_dir=no])
1617 AC_MSG_RESULT($gxx_include_dir)
1618
1619 # Process the option "--enable-version-specific-runtime-libs"
1620 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1621 AC_ARG_ENABLE(version-specific-runtime-libs,
1622 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
1623 [  version_specific_libs=yes
1624 # Need the gcc compiler version to know where to install libraries
1625 # and header files if --enable-version-specific-runtime-libs option
1626 # is selected.
1627 changequote(,)dnl
1628 gcc_version_trigger=${srcdir}/../gcc/version.c
1629 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1630 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1631 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1632 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1633 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}
1634 changequote([,])dnl
1635 ],version_specific_libs=no)
1636 AC_MSG_RESULT($version_specific_libs)
1637
1638 # Default case for install directory for include files.
1639 if test x"$version_specific_libs" = x"no" \
1640    && test x"$gxx_include_dir" = x"no"; then
1641   gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1642 fi
1643
1644 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1645 # Install a library built with a cross compiler in tooldir, not libdir.
1646 if test x"$glibcpp_toolexecdir" = x"no"; then
1647   if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
1648     glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1649     glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1650   else
1651     glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1652     glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1653   fi
1654 fi
1655
1656 AC_MSG_CHECKING([for install location])
1657 AC_MSG_RESULT($gxx_include_dir)
1658
1659 AC_SUBST(glibcpp_builddir)
1660 AC_SUBST(glibcpp_srcdir)
1661 AC_SUBST(glibcpp_prefixdir)
1662 AC_SUBST(gxx_include_dir)
1663 AC_SUBST(glibcpp_toolexecdir)
1664 AC_SUBST(glibcpp_toolexeclibdir)
1665 ])
1666
1667
1668 # Check whether LC_MESSAGES is available in <locale.h>.
1669 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1670 #
1671 # This file file be copied and used freely without restrictions.  It can
1672 # be used in projects which are not available under the GNU Public License
1673 # but which still want to provide support for the GNU gettext functionality.
1674 # Please note that the actual code is *not* freely available.
1675
1676 # serial 1
1677
1678 AC_DEFUN(AC_LC_MESSAGES, [
1679   AC_CHECK_HEADER(locale.h, [
1680     AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1681       [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1682        ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1683     if test $ac_cv_val_LC_MESSAGES = yes; then
1684       AC_DEFINE(HAVE_LC_MESSAGES)
1685     fi
1686   ])
1687 ])
1688
1689
1690 # Check for functions in math library.
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_MATHFUNCS(FUNCTION...)
1701 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1702 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1703 AC_SUBST(LIBMATHOBJS)dnl
1704 ])
1705
1706
1707 # Check for string functions.
1708 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1709 #
1710 # This file can be copied and used freely without restrictions.  It can
1711 # be used in projects which are not available under the GNU Public License
1712 # but which still want to provide support for the GNU gettext functionality.
1713 # Please note that the actual code is *not* freely available.
1714
1715 # serial 1
1716
1717 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1718 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1719 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1720 AC_SUBST(LIBSTRINGOBJS)dnl
1721 ])
1722
1723
1724 dnl This macro searches for a GNU version of make.  If a match is found, the
1725 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1726 dnl set to "#". This is useful for  including a special features in a Makefile,
1727 dnl which cannot be handled by other versions of make.  The variable
1728 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1729 dnl the empty string otherwise.
1730 dnl
1731 dnl Here is an example of its use:
1732 dnl
1733 dnl Makefile.in might contain:
1734 dnl
1735 dnl     # A failsafe way of putting a dependency rule into a makefile
1736 dnl     $(DEPEND):
1737 dnl             $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1738 dnl
1739 dnl     @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1740 dnl     @ifGNUmake@ include $(DEPEND)
1741 dnl     @ifGNUmake@ endif
1742 dnl
1743 dnl Then configure.in would normally contain:
1744 dnl
1745 dnl     CHECK_GNU_MAKE()
1746 dnl     AC_OUTPUT(Makefile)
1747 dnl
1748 dnl Then perhaps to cause gnu make to override any other make, we could do
1749 dnl something like this (note that GNU make always looks for GNUmakefile first):
1750 dnl
1751 dnl     if  ! test x$_cv_gnu_make_command = x ; then
1752 dnl             mv Makefile GNUmakefile
1753 dnl             echo .DEFAULT: > Makefile ;
1754 dnl             echo \  $_cv_gnu_make_command \$@ >> Makefile;
1755 dnl     fi
1756 dnl
1757 dnl Then, if any (well almost any) other make is called, and GNU make also
1758 dnl exists, then the other make wraps the GNU make.
1759 dnl
1760 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1761 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1762 dnl
1763 dnl #### Changes for libstdc++-v3:  reformatting and linewrapping; prepending
1764 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1765 dnl #### conditional's subshell (" --version" is not a command), using a
1766 dnl #### different option to grep(1).
1767 dnl #### -pme
1768 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1769 dnl #### ${MAKE:-make}).
1770 dnl #### -msokolov
1771 AC_DEFUN(
1772   GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1773           _cv_gnu_make_command='' ;
1774 dnl Search all the common names for GNU make
1775           for a in "${MAKE-make}" make gmake gnumake ; do
1776                   if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1777                   then
1778                           _cv_gnu_make_command=$a ;
1779                           break;
1780                   fi
1781           done ;
1782   ) ;
1783 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1784 dnl string, '#' otherwise
1785   if test  "x$_cv_gnu_make_command" != "x"  ; then
1786           ifGNUmake='' ;
1787   else
1788           ifGNUmake='#' ;
1789   fi
1790   AC_SUBST(ifGNUmake)
1791 ])
1792
1793 sinclude(../libtool.m4)
1794 dnl The lines below arrange for aclocal not to bring an installed
1795 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1796 dnl add a definition of LIBTOOL to Makefile.in.
1797 ifelse(,,,[AC_SUBST(LIBTOOL)
1798 AC_DEFUN([AM_PROG_LIBTOOL])
1799 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1800 AC_DEFUN([AC_PROG_LD])
1801 ])
1802
1803
1804
1805 # Do all the work for Automake.  This macro actually does too much --
1806 # some checks are only needed if your package does certain things.
1807 # But this isn't really a big deal.
1808
1809 # serial 1
1810
1811 dnl Usage:
1812 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1813
1814 AC_DEFUN(AM_INIT_AUTOMAKE,
1815 [AC_REQUIRE([AC_PROG_INSTALL])
1816 PACKAGE=[$1]
1817 AC_SUBST(PACKAGE)
1818 VERSION=[$2]
1819 AC_SUBST(VERSION)
1820 dnl test to see if srcdir already configured
1821 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1822   AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1823 fi
1824 ifelse([$3],,
1825 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1826 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1827 AC_REQUIRE([AM_SANITY_CHECK])
1828 AC_REQUIRE([AC_ARG_PROGRAM])
1829 dnl FIXME This is truly gross.
1830 missing_dir=`cd $ac_aux_dir && pwd`
1831 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1832 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1833 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1834 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1835 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1836 AC_REQUIRE([AC_PROG_MAKE_SET])])
1837
1838 #
1839 # Check to make sure that the build environment is sane.
1840 #
1841
1842 AC_DEFUN(AM_SANITY_CHECK,
1843 [AC_MSG_CHECKING([whether build environment is sane])
1844 # Just in case
1845 sleep 1
1846 echo timestamp > conftestfile
1847 # Do `set' in a subshell so we don't clobber the current shell's
1848 # arguments.  Must try -L first in case configure is actually a
1849 # symlink; some systems play weird games with the mod time of symlinks
1850 # (eg FreeBSD returns the mod time of the symlink's containing
1851 # directory).
1852 if (
1853    set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1854    if test "[$]*" = "X"; then
1855       # -L didn't work.
1856       set X `ls -t $srcdir/configure conftestfile`
1857    fi
1858    if test "[$]*" != "X $srcdir/configure conftestfile" \
1859       && test "[$]*" != "X conftestfile $srcdir/configure"; then
1860
1861       # If neither matched, then we have a broken ls.  This can happen
1862       # if, for instance, CONFIG_SHELL is bash and it inherits a
1863       # broken ls alias from the environment.  This has actually
1864       # happened.  Such a system could not be considered "sane".
1865       AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
1866 alias in your environment])
1867    fi
1868
1869    test "[$]2" = conftestfile
1870    )
1871 then
1872    # Ok.
1873    :
1874 else
1875    AC_MSG_ERROR([newly created file is older than distributed files!
1876 Check your system clock])
1877 fi
1878 rm -f conftest*
1879 AC_MSG_RESULT(yes)])
1880
1881 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1882 dnl The program must properly implement --version.
1883 AC_DEFUN(AM_MISSING_PROG,
1884 [AC_MSG_CHECKING(for working $2)
1885 # Run test in a subshell; some versions of sh will print an error if
1886 # an executable is not found, even if stderr is redirected.
1887 # Redirect stdin to placate older versions of autoconf.  Sigh.
1888 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1889    $1=$2
1890    AC_MSG_RESULT(found)
1891 else
1892    $1="$3/missing $2"
1893    AC_MSG_RESULT(missing)
1894 fi
1895 AC_SUBST($1)])
1896
1897 # Add --enable-maintainer-mode option to configure.
1898 # From Jim Meyering
1899
1900 # serial 1
1901
1902 AC_DEFUN(AM_MAINTAINER_MODE,
1903 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1904   dnl maintainer-mode is disabled by default
1905   AC_ARG_ENABLE(maintainer-mode,
1906 [  --enable-maintainer-mode enable make rules and dependencies not useful
1907                           (and sometimes confusing) to the casual installer],
1908       USE_MAINTAINER_MODE=$enableval,
1909       USE_MAINTAINER_MODE=no)
1910   AC_MSG_RESULT($USE_MAINTAINER_MODE)
1911   AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1912   MAINT=$MAINTAINER_MODE_TRUE
1913   AC_SUBST(MAINT)dnl
1914 ]
1915 )
1916
1917 # Define a conditional.
1918
1919 AC_DEFUN(AM_CONDITIONAL,
1920 [AC_SUBST($1_TRUE)
1921 AC_SUBST($1_FALSE)
1922 if $2; then
1923   $1_TRUE=
1924   $1_FALSE='#'
1925 else
1926   $1_TRUE='#'
1927   $1_FALSE=
1928 fi])
1929
1930 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1931
1932 AC_DEFUN(AM_CONFIG_HEADER,
1933 [AC_PREREQ([2.12])
1934 AC_CONFIG_HEADER([$1])
1935 dnl When config.status generates a header, we must update the stamp-h file.
1936 dnl This file resides in the same directory as the config header
1937 dnl that is generated.  We must strip everything past the first ":",
1938 dnl and everything past the last "/".
1939 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1940 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1941 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1942 <<am_indx=1
1943 for am_file in <<$1>>; do
1944   case " <<$>>CONFIG_HEADERS " in
1945   *" <<$>>am_file "*<<)>>
1946     echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1947     ;;
1948   esac
1949   am_indx=`expr "<<$>>am_indx" + 1`
1950 done<<>>dnl>>)
1951 changequote([,]))])
1952