libstdc++-v3/acinclude.m4

   1 dnl
   2 dnl Initialize configure bits.
   3 dnl
   4 dnl GLIBCPP_CONFIGURE
   5 AC_DEFUN(GLIBCPP_CONFIGURE, [
   6   dnl Default to --enable-multilib
   7   AC_ARG_ENABLE(multilib,
   8   [  --enable-multilib       build hella library versions (default)],
   9   [case "${enableval}" in
  10     yes) multilib=yes ;;
  11     no)  multilib=no ;;
  12     *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
  13    esac], [multilib=yes])dnl
  14
  15   glibcpp_basedir=$srcdir/$toprel/$1/libstdc++-v3
  16   AC_SUBST(glibcpp_basedir)
  17
  18   AM_INIT_AUTOMAKE(libstdc++, 3.0.0)
  19
  20   # Never versions of autoconf add an underscore to these functions.
  21   # Prevent future problems ...
  22   ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
  23   ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
  24   ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
  25   ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
  26
  27 #  AC_PROG_CC
  28
  29 # FIXME: We temporarily define our own version of AC_PROG_CC.  This is
  30 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
  31 # are probably using a cross compiler, which will not be able to fully
  32 # link an executable.  This should really be fixed in autoconf
  33 # itself.
  34
  35 AC_DEFUN(LIB_AC_PROG_CC,
  36 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  37 dnl Fool anybody using AC_PROG_CC.
  38 AC_PROVIDE([AC_PROG_CC])
  39 AC_CHECK_PROG(CC, gcc, gcc)
  40 if test -z "$CC"; then
  41   AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  42   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
  43 fi
  44
  45 AC_PROG_CC_GNU
  46
  47 if test $ac_cv_prog_gcc = yes; then
  48   GCC=yes
  49 dnl Check whether -g works, even if CFLAGS is set, in case the package
  50 dnl plays around with CFLAGS (such as to build both debugging and
  51 dnl normal versions of a library), tasteless as that idea is.
  52   ac_test_CFLAGS="${CFLAGS+set}"
  53   ac_save_CFLAGS="$CFLAGS"
  54   CFLAGS=
  55   AC_PROG_CC_G
  56   if test "$ac_test_CFLAGS" = set; then
  57     CFLAGS="$ac_save_CFLAGS"
  58   elif test $ac_cv_prog_cc_g = yes; then
  59     CFLAGS="-g -O2"
  60   else
  61     CFLAGS="-O2"
  62   fi
  63 else
  64   GCC=
  65   test "${CFLAGS+set}" = set || CFLAGS="-g"
  66 fi
  67 ])
  68
  69 LIB_AC_PROG_CC
  70
  71 # Can't just call these here as g++ requires libstc++ to be built....
  72 #  AC_PROG_CXX
  73
  74 # Likewise for AC_PROG_CXX.
  75 AC_DEFUN(LIB_AC_PROG_CXX,
  76 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
  77 dnl Fool anybody using AC_PROG_CXX.
  78 AC_PROVIDE([AC_PROG_CXX])
  79 # Use glibcpp_CXX so that we do not cause CXX to be cached with the
  80 # flags that come in CXX while configuring libstdc++.  They're different
  81 # from those used for all other target libraries.  If CXX is set in
  82 # the environment, respect that here.
  83 glibcpp_CXX=$CXX
  84 AC_CHECK_PROGS(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
  85 AC_SUBST(glibcpp_CXX)
  86 CXX=$glibcpp_CXX
  87 test -z "$glibcpp_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
  88
  89 AC_PROG_CXX_GNU
  90
  91 if test $ac_cv_prog_gxx = yes; then
  92   GXX=yes
  93 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
  94 dnl plays around with CXXFLAGS (such as to build both debugging and
  95 dnl normal versions of a library), tasteless as that idea is.
  96   ac_test_CXXFLAGS="${CXXFLAGS+set}"
  97   ac_save_CXXFLAGS="$CXXFLAGS"
  98   CXXFLAGS=
  99   AC_PROG_CXX_G
 100   if test "$ac_test_CXXFLAGS" = set; then
 101     CXXFLAGS="$ac_save_CXXFLAGS"
 102   elif test $ac_cv_prog_cxx_g = yes; then
 103     CXXFLAGS="-g -O2"
 104   else
 105     CXXFLAGS="-O2"
 106   fi
 107 else
 108   GXX=
 109   test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
 110 fi
 111 ])
 112
 113 LIB_AC_PROG_CXX
 114
 115   AC_CHECK_TOOL(AS, as)
 116   AC_CHECK_TOOL(AR, ar)
 117   AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
 118   AC_PROG_INSTALL
 119
 120   AM_MAINTAINER_MODE
 121
 122   # We need AC_EXEEXT to keep automake happy in cygnus mode.  However,
 123   # at least currently, we never actually build a program, so we never
 124   # need to use $(EXEEXT).  Moreover, the test for EXEEXT normally
 125   # fails, because we are probably configuring with a cross compiler
 126   # which cant create executables.  So we include AC_EXEEXT to keep
 127   # automake happy, but we dont execute it, since we dont care about
 128   # the result.
 129   if false; then
 130     # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
 131     # to nothing, so nothing would remain between `then' and `fi' if it
 132     # were not for the `:' below.
 133     :
 134     AC_EXEEXT
 135   fi
 136
 137   . [$]{glibcpp_basedir}/configure.host
 138
 139   case [$]{glibcpp_basedir} in
 140     /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
 141     *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
 142   esac
 143
 144   # This does for the target what configure.host does for the host.  In
 145   # addition to possibly modifying the same flags, it also sets up symlinks.
 146   GLIBCPP_CHECK_TARGET
 147 ])
 148
 149
 150 dnl
 151 dnl Check to see if g++ can compile this library, and if so, if any version-
 152 dnl specific precautions need to be taken.
 153 dnl
 154 dnl GLIBCPP_CHECK_COMPILER_VERSION
 155 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
 156 if test ! -f stamp-sanity-compiler; then
 157   AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
 158   AC_LANG_SAVE
 159   AC_LANG_CPLUSPLUS
 160   AC_TRY_COMPILE(, [
 161   #if __GNUC__ < 3
 162     not_ok
 163   #endif
 164   ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
 165   AC_LANG_RESTORE
 166   AC_MSG_RESULT($gpp_satisfactory)
 167   touch stamp-sanity-compiler
 168 fi
 169 ])
 170
 171
 172 dnl
 173 dnl Tests for newer compiler features, or features that are present in newer
 174 dnl compiler versions but not older compiler versions still in use, should
 175 dnl be placed here.
 176 dnl
 177 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
 178 dnl new inlining code or the new system_header pragma will die on -Werror.
 179 dnl Leave it out by default and use maint-mode to use it.
 180 dnl
 181 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
 182 dnl compiler supports it and the user has not requested debug mode.
 183 dnl
 184 dnl GLIBCPP_CHECK_COMPILER_FEATURES
 185 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
 186   # All these tests are for C++; save the language and the compiler flags.
 187   # The CXXFLAGS thing is suspicious, but based on similar bits previously
 188   # found in GLIBCPP_CONFIGURE.
 189   AC_LANG_SAVE
 190   AC_LANG_CPLUSPLUS
 191   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 192   ac_save_CXXFLAGS="$CXXFLAGS"
 193
 194   # Check for maintainer-mode bits.
 195   if test x"$USE_MAINTAINER_MODE" = xno; then
 196     WERROR=''
 197   else
 198     WERROR='-Werror'
 199   fi
 200
 201   # Check for -ffunction-sections -fdata-sections
 202   AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
 203   CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
 204   AC_TRY_COMPILE(, [int foo;
 205   ], [ac_fdsections=yes], [ac_fdsections=no])
 206   if test "$ac_test_CXXFLAGS" = set; then
 207     CXXFLAGS="$ac_save_CXXFLAGS"
 208   else
 209     # this is the suspicious part
 210     CXXFLAGS=''
 211   fi
 212   if test x"$ac_fdsections" = x"yes" &&
 213      test x"$enable_debug" = x"no"; then
 214     SECTION_FLAGS='-ffunction-sections -fdata-sections'
 215   fi
 216   AC_MSG_RESULT($ac_fdsections)
 217
 218   AC_LANG_RESTORE
 219   AC_SUBST(WERROR)
 220   AC_SUBST(SECTION_FLAGS)
 221 ])
 222
 223
 224 dnl
 225 dnl If GNU ld is in use, check to see if tricky linker opts can be used.  If
 226 dnl the native linker is in use, all variables will be defined to something
 227 dnl safe (like an empty string).
 228 dnl
 229 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
 230 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
 231 dnl
 232 dnl GLIBCPP_CHECK_LINKER_FEATURES
 233 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
 234   # If we're not using GNU ld, then there's no point in even trying these
 235   # tests.  Check for that first.  We should have already tested for gld
 236   # by now (in libtool), but require it now just to be safe...
 237   SECTION_LDFLAGS=''
 238   OPT_LDFLAGS=''
 239   AC_REQUIRE([AC_PROG_LD])
 240
 241   # Set --gc-sections.
 242   if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
 243     # GNU ld it is!  Joy and bunny rabbits!
 244
 245     # All these tests are for C++; save the language and the compiler flags.
 246     # Need to do this so that g++ won't try to link in libstdc++
 247     ac_test_CFLAGS="${CFLAGS+set}"
 248     ac_save_CFLAGS="$CFLAGS"
 249     CFLAGS='-x c++  -Wl,--gc-sections'
 250
 251     # Check for -Wl,--gc-sections
 252     # XXX This test is broken at the moment, as symbols required for
 253     # linking are now in libsupc++ (not built yet.....). In addition,
 254     # this test has cored on solaris in the past. In addition,
 255     # --gc-sections doesn't really work at the moment (keeps on discarding
 256     # used sections, first .eh_frame and now some of the glibc sections for
 257     # iconv). Bzzzzt. Thanks for playing, maybe next time.
 258     AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
 259     AC_TRY_RUN([
 260      int main(void)
 261      {
 262        try { throw 1; }
 263        catch (...) { };
 264        return 0;
 265      }
 266     ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
 267     if test "$ac_test_CFLAGS" = set; then
 268       CFLAGS="$ac_save_CFLAGS"
 269     else
 270       # this is the suspicious part
 271       CFLAGS=''
 272     fi
 273     if test "$ac_sectionLDflags" = "yes"; then
 274       SECTION_LDFLAGS='-Wl,--gc-sections'
 275     fi
 276     AC_MSG_RESULT($ac_sectionLDflags)
 277   fi
 278
 279   # Set linker optimization flags.
 280   if test x"$ac_cv_prog_gnu_ld" = x"yes" &&
 281      test x"$enable_debug" = x"no"; then
 282     OPT_LDFLAGS='-Wl,-O1'
 283   fi
 284
 285   AC_SUBST(SECTION_LDFLAGS)
 286   AC_SUBST(OPT_LDFLAGS)
 287 ])
 288
 289
 290 dnl
 291 dnl Check to see if the (math function) argument passed is
 292 dnl declared when using the c++ compiler
 293 dnl ASSUMES argument is a math function with ONE parameter
 294 dnl
 295 dnl GLIBCPP_CHECK_MATH_DECL_1
 296 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
 297   AC_MSG_CHECKING([for $1 declaration])
 298   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 299     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 300       AC_LANG_SAVE
 301       AC_LANG_CPLUSPLUS
 302       AC_TRY_COMPILE([#include <math.h>
 303                       #ifdef HAVE_IEEEFP_H
 304                       #include <ieeefp.h>
 305                       #endif
 306                      ],
 307                      [ $1(0);],
 308                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 309       AC_LANG_RESTORE
 310     ])
 311   fi
 312   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 313 ])
 314
 315 dnl
 316 dnl Check to see if the (math function) argument passed is
 317 dnl 1) declared when using the c++ compiler
 318 dnl 2) has "C" linkage
 319 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
 320 dnl
 321 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 322 dnl
 323 dnl argument 1 is name of function to check
 324 dnl
 325 dnl ASSUMES argument is a math function with ONE parameter
 326 dnl
 327 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
 328 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
 329   GLIBCPP_CHECK_MATH_DECL_1($1)
 330   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 331     AC_CHECK_FUNCS($1)
 332   else
 333     GLIBCPP_CHECK_MATH_DECL_1(_$1)
 334     if test x$glibcpp_cv_func__$1_use = x"yes"; then
 335       AC_CHECK_FUNCS(_$1)
 336     fi
 337   fi
 338 ])
 339
 340
 341 dnl
 342 dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
 343 dnl of functions at once.  It's an all-or-nothing check -- either
 344 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
 345 dnl Doing it this way saves significant configure time.
 346 AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
 347   AC_MSG_CHECKING([for $1 functions])
 348   AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
 349     AC_LANG_SAVE
 350     AC_LANG_CPLUSPLUS
 351     AC_TRY_COMPILE([#include <math.h>],
 352                    [ `for x in $3; do echo "$x (0);"; done` ],
 353                    [glibcpp_cv_func_$2_use=yes],
 354                    [glibcpp_cv_func_$2_use=no])
 355     AC_LANG_RESTORE])
 356   AC_MSG_RESULT($glibcpp_cv_func_$2_use)
 357   if test x$glibcpp_cv_func_$2_use = x"yes"; then
 358     AC_CHECK_FUNCS($3)
 359   fi
 360 ])
 361
 362 dnl
 363 dnl Check to see if the (math function) argument passed is
 364 dnl declared when using the c++ compiler
 365 dnl ASSUMES argument is a math function with TWO parameters
 366 dnl
 367 dnl GLIBCPP_CHECK_MATH_DECL_2
 368 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
 369   AC_MSG_CHECKING([for $1 declaration])
 370   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 371     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 372       AC_LANG_SAVE
 373       AC_LANG_CPLUSPLUS
 374       AC_TRY_COMPILE([#include <math.h>],
 375                      [ $1(0, 0);],
 376                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 377       AC_LANG_RESTORE
 378     ])
 379   fi
 380   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 381 ])
 382
 383 dnl
 384 dnl Check to see if the (math function) argument passed is
 385 dnl 1) declared when using the c++ compiler
 386 dnl 2) has "C" linkage
 387 dnl
 388 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 389 dnl
 390 dnl argument 1 is name of function to check
 391 dnl
 392 dnl ASSUMES argument is a math function with TWO parameters
 393 dnl
 394 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
 395 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
 396   GLIBCPP_CHECK_MATH_DECL_2($1)
 397   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 398     AC_CHECK_FUNCS($1)
 399   else
 400     GLIBCPP_CHECK_MATH_DECL_2(_$1)
 401     if test x$glibcpp_cv_func__$1_use = x"yes"; then
 402       AC_CHECK_FUNCS(_$1)
 403     fi
 404   fi
 405 ])
 406
 407
 408 dnl
 409 dnl Check to see if the (math function) argument passed is
 410 dnl declared when using the c++ compiler
 411 dnl ASSUMES argument is a math function with THREE parameters
 412 dnl
 413 dnl GLIBCPP_CHECK_MATH_DECL_3
 414 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
 415   AC_MSG_CHECKING([for $1 declaration])
 416   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 417     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 418       AC_LANG_SAVE
 419       AC_LANG_CPLUSPLUS
 420       AC_TRY_COMPILE([#include <math.h>],
 421                      [ $1(0, 0, 0);],
 422                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 423       AC_LANG_RESTORE
 424     ])
 425   fi
 426   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 427 ])
 428
 429 dnl
 430 dnl Check to see if the (math function) argument passed is
 431 dnl 1) declared when using the c++ compiler
 432 dnl 2) has "C" linkage
 433 dnl
 434 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 435 dnl
 436 dnl argument 1 is name of function to check
 437 dnl
 438 dnl ASSUMES argument is a math function with THREE parameters
 439 dnl
 440 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
 441 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
 442   GLIBCPP_CHECK_MATH_DECL_3($1)
 443   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 444     AC_CHECK_FUNCS($1)
 445   else
 446     GLIBCPP_CHECK_MATH_DECL_3(_$1)
 447     if test x$glibcpp_cv_func__$1_use = x"yes"; then
 448       AC_CHECK_FUNCS(_$1)
 449     fi
 450   fi
 451 ])
 452
 453
 454 dnl
 455 dnl Check to see if the (stdlib function) argument passed is
 456 dnl 1) declared when using the c++ compiler
 457 dnl 2) has "C" linkage
 458 dnl
 459 dnl argument 1 is name of function to check
 460 dnl
 461 dnl ASSUMES argument is a math function with TWO parameters
 462 dnl
 463 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
 464 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
 465   AC_MSG_CHECKING([for $1 declaration])
 466   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 467     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 468       AC_LANG_SAVE
 469       AC_LANG_CPLUSPLUS
 470       AC_TRY_COMPILE([#include <stdlib.h>],
 471                      [ $1(0, 0);],
 472                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 473       AC_LANG_RESTORE
 474     ])
 475   fi
 476   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 477   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 478     AC_CHECK_FUNCS($1)
 479   fi
 480 ])
 481
 482
 483 dnl
 484 dnl Because the builtins are picky picky picky about the arguments they take,
 485 dnl do an explict linkage tests here.
 486 dnl Check to see if the (math function) argument passed is
 487 dnl 1) declared when using the c++ compiler
 488 dnl 2) has "C" linkage
 489 dnl
 490 dnl Define HAVE_CARGF etc if "cargf" is declared and links
 491 dnl
 492 dnl argument 1 is name of function to check
 493 dnl
 494 dnl ASSUMES argument is a math function with ONE parameter
 495 dnl
 496 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
 497 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
 498   AC_MSG_CHECKING([for $1 declaration])
 499   if test x${glibcpp_cv_func_$1_use+set} != xset; then
 500     AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
 501       AC_LANG_SAVE
 502       AC_LANG_CPLUSPLUS
 503       AC_TRY_COMPILE([#include <math.h>],
 504                      [ $1(0);],
 505                      [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
 506       AC_LANG_RESTORE
 507     ])
 508   fi
 509   AC_MSG_RESULT($glibcpp_cv_func_$1_use)
 510   if test x$glibcpp_cv_func_$1_use = x"yes"; then
 511     AC_MSG_CHECKING([for $1 linkage])
 512     if test x${glibcpp_cv_func_$1_link+set} != xset; then
 513       AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
 514         AC_TRY_LINK([#include <math.h>],
 515                     [ $1(0);],
 516                     [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
 517       ])
 518     fi
 519     AC_MSG_RESULT($glibcpp_cv_func_$1_link)
 520     if test x$glibcpp_cv_func_$1_link = x"yes"; then
 521       ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 522       AC_DEFINE_UNQUOTED(${ac_tr_func})
 523     fi
 524   fi
 525 ])
 526
 527
 528 dnl
 529 dnl Check to see what builtin math functions are supported
 530 dnl
 531 dnl check for __builtin_abs
 532 dnl check for __builtin_fabsf
 533 dnl check for __builtin_fabs
 534 dnl check for __builtin_fabl
 535 dnl check for __builtin_labs
 536 dnl check for __builtin_sqrtf
 537 dnl check for __builtin_sqrtl
 538 dnl check for __builtin_fsqrt
 539 dnl check for __builtin_sinf
 540 dnl check for __builtin_sin
 541 dnl check for __builtin_sinl
 542 dnl check for __builtin_cosf
 543 dnl check for __builtin_cos
 544 dnl check for __builtin_cosl
 545 dnl
 546 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 547 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
 548   dnl Test for builtin math functions.
 549   dnl These are made in gcc/c-common.c
 550   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
 551   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
 552   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
 553   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
 554   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
 555
 556   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
 557   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
 558   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
 559
 560   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
 561   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
 562   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
 563
 564   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
 565   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
 566   GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
 567
 568   dnl There is, without a doubt, a more elegant way to have these
 569   dnl names exported so that they won't be stripped out of acconfig.h by
 570   dnl autoheader. I leave this as an exercise to somebody less frustrated
 571   dnl than I.... please email the libstdc++ list if you can figure out a
 572   dnl more elegant approach (see autoconf/acgen.m4 and specifically
 573   dnl AC_CHECK_FUNC for things to steal.)
 574   dummyvar=no
 575   if test x$dummyvar = x"yes"; then
 576     AC_DEFINE(HAVE___BUILTIN_ABS)
 577     AC_DEFINE(HAVE___BUILTIN_LABS)
 578     AC_DEFINE(HAVE___BUILTIN_COS)
 579     AC_DEFINE(HAVE___BUILTIN_COSF)
 580     AC_DEFINE(HAVE___BUILTIN_COSL)
 581     AC_DEFINE(HAVE___BUILTIN_FABS)
 582     AC_DEFINE(HAVE___BUILTIN_FABSF)
 583     AC_DEFINE(HAVE___BUILTIN_FABSL)
 584     AC_DEFINE(HAVE___BUILTIN_SIN)
 585     AC_DEFINE(HAVE___BUILTIN_SINF)
 586     AC_DEFINE(HAVE___BUILTIN_SINL)
 587     AC_DEFINE(HAVE___BUILTIN_FSQRT)
 588     AC_DEFINE(HAVE___BUILTIN_SQRTF)
 589     AC_DEFINE(HAVE___BUILTIN_SQRTL)
 590   fi
 591 ])
 592
 593
 594 dnl
 595 dnl Check to see what the underlying c library
 596 dnl These checks need to do two things:
 597 dnl 1) make sure the name is declared when using the c++ compiler
 598 dnl 2) make sure the name has "C" linkage
 599 dnl This might seem like overkill but experience has shown that it's not...
 600 dnl
 601 dnl Define HAVE_STRTOLD if "strtold" is declared and links
 602 dnl Define HAVE_STRTOF if "strtof" is declared and links
 603 dnl Define HAVE_DRAND48 if "drand48" is declared and links
 604 dnl
 605 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
 606 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
 607   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 608   ac_save_CXXFLAGS="$CXXFLAGS"
 609   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 610
 611   GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
 612   AC_CHECK_FUNCS(drand48)
 613
 614   CXXFLAGS="$ac_save_CXXFLAGS"
 615 ])
 616
 617
 618 dnl
 619 dnl Check to see what the underlying c library or math library is like.
 620 dnl These checks need to do two things:
 621 dnl 1) make sure the name is declared when using the c++ compiler
 622 dnl 2) make sure the name has "C" linkage
 623 dnl This might seem like overkill but experience has shown that it's not...
 624 dnl
 625 dnl Define HAVE_CARGF etc if "cargf" is found.
 626 dnl
 627 dnl GLIBCPP_CHECK_MATH_SUPPORT
 628 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
 629   ac_test_CXXFLAGS="${CXXFLAGS+set}"
 630   ac_save_CXXFLAGS="$CXXFLAGS"
 631   CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
 632
 633   dnl Check libm
 634   AC_CHECK_LIB(m, sin, libm="-lm")
 635   ac_save_LIBS="$LIBS"
 636   LIBS="$LIBS $libm"
 637
 638   dnl Check to see if certain C math functions exist.
 639   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
 640   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
 641   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
 642   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
 643   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
 644   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
 645   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
 646
 647   dnl Check to see if basic C math functions have float versions.
 648   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
 649                                           float_trig,
 650                                           acosf asinf atanf \
 651                                           cosf sinf tanf \
 652                                           coshf sinhf tanhf)
 653   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
 654                                           float_round,
 655                                           ceilf floorf)
 656   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
 657   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
 658   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
 659   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
 660   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
 661   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
 662   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
 663   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
 664   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
 665   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
 666   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
 667   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
 668   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
 669
 670   dnl Check to see if basic C math functions have long double versions.
 671   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
 672                                           long_double_trig,
 673                                           acosl asinl atanl \
 674                                           cosl sinl tanl \
 675                                           coshl sinhl tanhl)
 676   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
 677                                           long_double_round,
 678                                           ceill floorl)
 679   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
 680   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
 681   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
 682   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
 683   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
 684   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
 685   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
 686   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
 687   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
 688   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
 689   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
 690   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
 691   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
 692   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
 693   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
 694   GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
 695
 696   dnl Some runtimes have these functions with a preceding underscore. Please
 697   dnl keep this sync'd with the one above. And if you add any new symbol,
 698   dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
 699   dnl Check to see if certain C math functions exist.
 700
 701   dnl Check to see if basic C math functions have float versions.
 702   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
 703                                           _float_trig,
 704                                           _acosf _asinf _atanf \
 705                                           _cosf _sinf _tanf \
 706                                           _coshf _sinhf _tanhf)
 707   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
 708                                           _float_round,
 709                                           _ceilf _floorf)
 710
 711   dnl Check to see if basic C math functions have long double versions.
 712   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
 713                                           _long_double_trig,
 714                                           _acosl _asinl _atanl \
 715                                           _cosl _sinl _tanl \
 716                                           _coshl _sinhl _tanhl)
 717   GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
 718                                           _long_double_round,
 719                                           _ceill _floorl)
 720
 721   LIBS="$ac_save_LIBS"
 722   CXXFLAGS="$ac_save_CXXFLAGS"
 723 ])
 724
 725
 726 dnl
 727 dnl Check to see if there is native support for complex
 728 dnl
 729 dnl Don't compile bits in math/* if native support exits.
 730 dnl
 731 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
 732 dnl
 733 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 734 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
 735   dnl Check for complex versions of math functions of platform.
 736   AC_CHECK_LIB(m, main)
 737   AC_REPLACE_MATHFUNCS(nan hypot hypotf atan2f expf copysignf)
 738
 739   dnl Compile the long double complex functions only if the function
 740   dnl provides the non-complex long double functions that are needed.
 741   dnl Currently this includes copysignl and atan2l, which should be
 742   dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
 743   USE_COMPLEX_LONG_DOUBLE=no
 744   if test x$ac_cv_func_atan2l = x"yes" &&
 745      test x$ac_cv_func_copysignl = x"yes"; then
 746     USE_COMPLEX_LONG_DOUBLE=yes
 747     AC_REPLACE_MATHFUNCS(hypotl signbitl)
 748   fi
 749
 750   AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
 751 ])
 752
 753
 754 dnl Check to see what architecture and operating system we are compiling
 755 dnl for.  Also, if architecture- or OS-specific flags are required for
 756 dnl compilation, pick them up here.
 757 dnl
 758 dnl GLIBCPP_CHECK_TARGET
 759 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
 760     . [$]{glibcpp_basedir}/configure.target
 761     AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
 762     AC_MSG_RESULT(OS config directory is $os_include_dir)
 763     AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
 764 ])
 765
 766
 767 dnl
 768 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
 769 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled.  (This
 770 dnl must have been previously checked.)
 771 dnl
 772 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
 773 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
 774 dnl
 775 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
 776 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
 777
 778   dnl Test wchar.h for mbstate_t, which is needed for char_traits and
 779   dnl others even if wchar_t support is not on.
 780   AC_MSG_CHECKING([for mbstate_t])
 781   AC_TRY_COMPILE([#include <wchar.h>],
 782   [mbstate_t teststate;],
 783   have_mbstate_t=yes, have_mbstate_t=no)
 784   AC_MSG_RESULT($have_mbstate_t)
 785   if test x"$have_mbstate_t" = xyes; then
 786     AC_DEFINE(HAVE_MBSTATE_T)
 787   fi
 788
 789   dnl Sanity check for existence of ISO C99 headers for extended encoding.
 790   AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
 791   AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
 792
 793   dnl Only continue checking if the ISO C99 headers exist and support is on.
 794   if test x"$ac_has_wchar_h" = xyes &&
 795      test x"$ac_has_wctype_h" = xyes &&
 796      test x"$enable_c_mbchar" != xno; then
 797
 798     dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
 799     dnl numeric_limits can instantiate type_traits<wchar_t>
 800     AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
 801     AC_TRY_COMPILE([#include <wchar.h>],
 802     [int i = WCHAR_MIN; int j = WCHAR_MAX;],
 803     has_wchar_minmax=yes, has_wchar_minmax=no)
 804     AC_MSG_RESULT($has_wchar_minmax)
 805
 806     dnl Test wchar.h for WEOF, which is what we use to determine whether
 807     dnl to specialize for char_traits<wchar_t> or not.
 808     AC_MSG_CHECKING([for WEOF])
 809     AC_TRY_COMPILE([
 810       #include <wchar.h>
 811       #include <stddef.h>],
 812     [wint_t i = WEOF;],
 813     has_weof=yes, has_weof=no)
 814     AC_MSG_RESULT($has_weof)
 815
 816     dnl Tests for wide character functions used in char_traits<wchar_t>.
 817     ac_wfuncs=yes
 818     AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
 819     ac_wfuncs=no)
 820
 821     dnl Checks for names injected into std:: by the c_std headers.
 822     AC_CHECK_FUNCS(btowc wctob fgetwc fgetwc fgetws fputwc fputws fwide \
 823     fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
 824     vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
 825     mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
 826     wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
 827     wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
 828     ac_wfuncs=no)
 829
 830     AC_MSG_CHECKING([for ISO C99 wchar_t support])
 831     if test x"$has_weof" = xyes &&
 832        test x"$has_wchar_minmax" = xyes &&
 833        test x"$ac_wfuncs" = xyes; then
 834       ac_isoC99_wchar_t=yes
 835     else
 836       ac_isoC99_wchar_t=no
 837     fi
 838     AC_MSG_RESULT($ac_isoC99_wchar_t)
 839
 840     dnl Use iconv for wchar_t to char conversions. As such, check for
 841     dnl X/Open Portability Guide, version 2 features (XPG2).
 842     AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
 843     AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
 844
 845     dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
 846     AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
 847     ac_save_LIBS="$LIBS"
 848     LIBS="$LIBS $libiconv"
 849
 850     AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
 851     ac_XPG2funcs=yes, ac_XPG2funcs=no)
 852
 853     LIBS="$ac_save_LIBS"
 854
 855     AC_MSG_CHECKING([for XPG2 wchar_t support])
 856     if test x"$ac_has_iconv_h" = xyes &&
 857        test x"$ac_has_langinfo_h" = xyes &&
 858        test x"$ac_XPG2funcs" = xyes; then
 859       ac_XPG2_wchar_t=yes
 860     else
 861       ac_XPG2_wchar_t=no
 862     fi
 863     AC_MSG_RESULT($ac_XPG2_wchar_t)
 864
 865     dnl At the moment, only enable wchar_t specializations if all the
 866     dnl above support is present.
 867     AC_MSG_CHECKING([for enabled wchar_t specializations])
 868     if test x"$ac_isoC99_wchar_t" = xyes &&
 869        test x"$ac_XPG2_wchar_t" = xyes; then
 870       AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
 871       AC_MSG_RESULT("yes")
 872     else
 873       AC_MSG_RESULT("no")
 874     fi
 875   else
 876     dnl Wide characters disabled by the user.
 877     AC_MSG_WARN([wchar_t support disabled.])
 878   fi
 879 ])
 880
 881
 882 dnl
 883 dnl Check for special debugging mode; not for production use.
 884 dnl
 885 dnl GLIBCPP_ENABLE_DEBUG
 886 dnl --enable-debug sets '-ggdb3 -O0'.
 887 dnl --disable-debug sets '-g' and whatever optimization options the
 888 dnl     compiler can handle.
 889 dnl  +  --enable-maintainer-mode automatically defaults this to on.
 890 dnl  +  Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
 891 dnl  +  Usage:  GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
 892 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
 893 dnl       defaults to `no'.
 894 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
 895 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
 896 AC_ARG_ENABLE(debug,
 897 changequote(<<, >>)dnl
 898 <<  --enable-debug          extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
 899 changequote([, ])dnl
 900 [case "${enableval}" in
 901  yes) enable_debug=yes ;;
 902  no)  enable_debug=no ;;
 903  *)   AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
 904  esac],
 905 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
 906
 907 dnl Option parsed, now set things appropriately
 908 case "${enable_debug}" in
 909     yes)
 910         DEBUG_FLAGS='-O0 -ggdb3'
 911         ;;
 912     no)
 913         DEBUG_FLAGS='-g'
 914         ;;
 915 esac
 916 AC_SUBST(DEBUG_FLAGS)
 917 ])
 918
 919
 920 dnl
 921 dnl Check for "unusual" flags to pass to the compiler while building.
 922 dnl
 923 dnl GLIBCPP_ENABLE_CXX_FLAGS
 924 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
 925 dnl     experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
 926 dnl     Somehow this same set of flags must be passed when [re]building
 927 dnl     libgcc.
 928 dnl --disable-cxx-flags passes nothing.
 929 dnl  +  See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
 930 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
 931 dnl         http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
 932 dnl  +  Usage:  GLIBCPP_ENABLE_CXX_FLAGS(default flags)
 933 dnl       If "default flags" is an empty string (or "none"), the effect is
 934 dnl       the same as --disable or --enable=no.
 935 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
 936 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
 937 AC_ARG_ENABLE(cxx-flags,
 938 changequote(<<, >>)dnl
 939 <<  --enable-cxx-flags=FLAGS      pass compiler FLAGS when building library;
 940                                 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
 941 changequote([, ])dnl
 942 [case "x$enableval" in
 943  xyes)
 944         AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
 945  xno|x)
 946         enable_cxx_flags='' ;;
 947  *)
 948         enable_cxx_flags="$enableval" ;;
 949  esac],
 950 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
 951
 952 dnl Thinko on my part during design.  This kludge is the workaround.
 953 if test "$enable_cxx_flags" = "none"; then
 954   enable_cxx_flags='';
 955 fi
 956
 957 dnl Run through flags (either default or command-line) and set anything
 958 dnl extra (e.g., #defines) that must accompany particular g++ options.
 959 if test -n "$enable_cxx_flags"; then
 960     for f in $enable_cxx_flags; do
 961         case "$f" in
 962             -fhonor-std)  ;;
 963             -*)  ;;
 964             *)   # and we're trying to pass /what/ exactly?
 965                  AC_MSG_ERROR([compiler flags start with a -]) ;;
 966         esac
 967     done
 968 fi
 969 EXTRA_CXX_FLAGS="$enable_cxx_flags"
 970 AC_SUBST(EXTRA_CXX_FLAGS)
 971 ])
 972
 973
 974 dnl
 975 dnl Check for which locale library to use:  gnu or generic.
 976 dnl
 977 dnl GLIBCPP_ENABLE_CLOCALE
 978 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
 979 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
 980 dnl
 981 dnl default is generic
 982 dnl
 983 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
 984   AC_MSG_CHECKING([for clocale to use])
 985   AC_ARG_ENABLE(clocale,
 986   [  --enable-clocale        enable model for target locale package.
 987   --enable-clocale=MODEL  use MODEL target-speific locale package. [default=generic]
 988   ],
 989   if test x$enable_clocale = xno; then
 990      enable_clocale=generic
 991   fi,
 992      enable_clocale=generic)
 993
 994   enable_clocale_flag=$enable_clocale
 995
 996   dnl Check if a valid locale package
 997   case x${enable_clocale_flag} in
 998     xgnu)
 999       CLOCALE_H=config/c_locale_gnu.h
1000       CLOCALE_CC=config/c_locale_gnu.cc
1001       AC_MSG_RESULT(gnu)
1002       ;;
1003     xgeneric)
1004       CLOCALE_H=config/c_locale_generic.h
1005       CLOCALE_CC=config/c_locale_generic.cc
1006       AC_MSG_RESULT(generic)
1007       ;;
1008     *)
1009       echo "$enable_clocale is an unknown locale package" 1>&2
1010       exit 1
1011       ;;
1012   esac
1013
1014   AC_LINK_FILES($CLOCALE_H, include/bits/c++locale.h)
1015   AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1016 ])
1017
1018
1019 dnl
1020 dnl Check for which I/O library to use:  libio, or something specific.
1021 dnl
1022 dnl GLIBCPP_ENABLE_CSTDIO
1023 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1024 dnl
1025 dnl default is stdio
1026 dnl
1027 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1028   AC_MSG_CHECKING([for cstdio to use])
1029   AC_ARG_ENABLE(cstdio,
1030   [  --enable-cstdio         enable stdio for target io package.
1031   --enable-cstdio=LIB     use LIB target-speific io package. [default=stdio]
1032   ],
1033   if test x$enable_cstdio = xno; then
1034      enable_cstdio=stdio
1035   fi,
1036      enable_cstdio=stdio)
1037
1038   enable_cstdio_flag=$enable_cstdio
1039
1040   dnl Check if a valid I/O package
1041   case x${enable_cstdio_flag} in
1042     xlibio)
1043       CSTDIO_H=config/c_io_libio.h
1044       BASIC_FILE_H=config/basic_file_libio.h
1045       BASIC_FILE_CC=config/basic_file_libio.cc
1046       AC_MSG_RESULT(libio)
1047
1048       # see if we are on a system with libio native (ie, linux)
1049       AC_CHECK_HEADER(libio.h,  has_libio=yes, has_libio=no)
1050
1051       # Need to check and see what version of glibc is being used. If
1052       # it's not glibc-2.2 or higher, then we'll need to go ahead and
1053       # compile most of libio for linux systems.
1054       if test x$has_libio = x"yes"; then
1055         case "$target" in
1056           *-*-linux*)
1057               AC_MSG_CHECKING([for glibc version >= 2.2])
1058               AC_EGREP_CPP([ok], [
1059             #include <features.h>
1060               #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1061                     ok
1062               #endif
1063               ], glibc_satisfactory=yes, glibc_satisfactory=no)
1064               AC_MSG_RESULT($glibc_satisfactory)
1065             ;;
1066         esac
1067
1068         # XXX at the moment, admit defeat and force the recompilation
1069         # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1070         glibc_satisfactory=no
1071
1072         if test x$glibc_satisfactory = x"yes"; then
1073            need_libio=no
1074            need_wlibio=no
1075         else
1076            need_libio=yes
1077            # bkoz XXX need to add checks to enable this
1078            # pme XXX here's a first pass at such a check
1079            if test x$enable_c_mbchar != xno; then
1080               need_wlibio=yes
1081            else
1082               need_wlibio=no
1083            fi
1084         fi
1085
1086       else
1087          # Using libio, but <libio.h> doesn't exist on the target system. . .
1088          need_libio=yes
1089          # bkoz XXX need to add checks to enable this
1090          # pme XXX here's a first pass at such a check
1091          if test x$enable_c_mbchar != xno; then
1092              need_wlibio=yes
1093          else
1094              need_wlibio=no
1095          fi
1096       fi
1097       ;;
1098     xstdio | x | xno | xnone | xyes)
1099       # default
1100       CSTDIO_H=config/c_io_stdio.h
1101       BASIC_FILE_H=config/basic_file_stdio.h
1102       BASIC_FILE_CC=config/basic_file_stdio.cc
1103       AC_MSG_RESULT(stdio)
1104
1105       # We're not using stdio.
1106       need_libio=no
1107       need_wlibio=no
1108       ;;
1109     *)
1110       echo "$enable_cstdio is an unknown io package" 1>&2
1111       exit 1
1112       ;;
1113   esac
1114   AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1115   AC_LINK_FILES($BASIC_FILE_H, include/bits/basic_file_model.h)
1116   AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1117
1118   # 2000-08-04 bkoz hack
1119   CCODECVT_C=config/c_io_libio_codecvt.c
1120   AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1121   # 2000-08-04 bkoz hack
1122
1123   AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1124                  test "$need_libio" = yes || test "$need_wlibio" = yes)
1125   AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1126   AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1127   if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1128     libio_la=../libio/libio.la
1129   else
1130     libio_la=
1131   fi
1132   AC_SUBST(libio_la)
1133 ])
1134
1135
1136 dnl
1137 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1138 dnl We must stage the required headers so that they will be installed
1139 dnl with the library (unlike libgcc, the STL implementation is provided
1140 dnl solely within headers).  Since we must not inject random user-space
1141 dnl macro names into user-provided C++ code, we first stage into <file>-in
1142 dnl and process to <file> with an output command.  The reason for a two-
1143 dnl stage process here is to correctly handle $srcdir!=$objdir without
1144 dnl having to write complex code (the sed commands to clean the macro
1145 dnl namespace are complex and fragile enough as it is).
1146 dnl
1147 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1148   AC_MSG_CHECKING([for thread model used by GCC])
1149   target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1150   AC_MSG_RESULT([$target_thread_file])
1151
1152   AC_LINK_FILES($toprel/gcc/gthr.h, include/bits/gthr.h-in)
1153   AC_LINK_FILES($toprel/gcc/gthr-single.h,
1154                 include/bits/gthr-single.h-in)
1155   AC_LINK_FILES($toprel/gcc/gthr-$target_thread_file.h,
1156                 include/bits/gthr-default.h-in)
1157   if test $target_thread_file != single; then
1158     AC_DEFINE(HAVE_GTHR_DEFAULT)
1159     AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1160   fi
1161   AC_OUTPUT_COMMANDS([d=include/bits
1162     rm -f $d/gthr.h $d/gthr-single.h $d/gthr-default.h
1163     sed '/^#/s/\([A-Z_][A-Z_]*\)/_GLIBCPP_\1/g' <$d/gthr.h-in >$d/gthr.h
1164     sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-single.h-in \
1165       | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' >$d/gthr-single.h
1166     sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-default.h-in \
1167       | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' \
1168       | sed 's/\([A-Z_]*WEAK\)/_GLIBCPP_\1/g' >$d/gthr-default.h])
1169 ])
1170
1171
1172 dnl
1173 dnl Check for exception handling support.  If an explicit enable/disable
1174 dnl sjlj exceptions is given, we don't have to detect.  Otherwise the
1175 dnl target may or may not support call frame exceptions.
1176 dnl
1177 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1178 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1179 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1180 dnl
1181 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1182 dnl
1183 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1184   AC_MSG_CHECKING([for exception model to use])
1185   AC_LANG_SAVE
1186   AC_LANG_CPLUSPLUS
1187   AC_ARG_ENABLE(sjlj-exceptions,
1188   [  --enable-sjlj-exceptions  force use of builtin_setjmp for exceptions],
1189   [:],
1190   [dnl Botheration.  Now we've got to detect the exception model.
1191    dnl Link tests against libgcc.a are problematic since -- at least
1192    dnl as of this writing -- we've not been given proper -L bits for
1193    dnl single-tree newlib and libgloss.
1194    dnl
1195    dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1196    dnl conftest files before we got a change to grep them first.
1197    cat > conftest.$ac_ext << EOF
1198 [#]line __oline__ "configure"
1199 struct S { ~S(); };
1200 void bar();
1201 void foo()
1202 {
1203   S s;
1204   bar();
1205 }
1206 EOF
1207    old_CXXFLAGS="$CXXFLAGS"
1208    CXXFLAGS=-S
1209    if AC_TRY_EVAL(ac_compile); then
1210      if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1211        enable_sjlj_exceptions=yes
1212      elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1213        enable_sjlj_exceptions=no
1214      fi
1215    fi
1216    CXXFLAGS="$old_CXXFLAGS"
1217    rm -f conftest*])
1218    if test x$enable_sjlj_exceptions = xyes; then
1219      AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1220         [Define if the compiler is configured for setjmp/longjmp exceptions.])
1221      ac_exception_model_name=sjlj
1222    elif test x$enable_sjlj_exceptions = xno; then
1223      ac_exception_model_name="call frame"
1224    else
1225      AC_MSG_ERROR([unable to detect exception model])
1226    fi
1227    AC_LANG_RESTORE
1228    AC_MSG_RESULT($ac_exception_model_name)
1229 ])
1230
1231
1232 dnl
1233 dnl Check for ISO/IEC 9899:1999 "C99" support.
1234 dnl
1235 dnl GLIBCPP_ENABLE_C99
1236 dnl --enable-c99 defines _GLIBCPP_USE_C99
1237 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1238 dnl  +  Usage:  GLIBCPP_ENABLE_C99[(DEFAULT)]
1239 dnl       Where DEFAULT is either `yes' or `no'.  If omitted, it
1240 dnl       defaults to `no'.
1241 dnl  +  If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1242 dnl
1243 dnl GLIBCPP_ENABLE_C99
1244 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1245   define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1246
1247   AC_ARG_ENABLE(c99,
1248   changequote(<<, >>)dnl
1249   <<--enable-c99      turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1250   changequote([, ])dnl
1251   [case "$enableval" in
1252    yes) enable_c99=yes ;;
1253    no)  enable_c99=no ;;
1254    *)   AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1255    esac],
1256   enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1257
1258   AC_LANG_SAVE
1259   AC_LANG_CPLUSPLUS
1260
1261   # Check for the existence of <math.h> functions used if C99 is enabled.
1262   ac_c99_math=yes;
1263   AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1264   AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1265   AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1266   AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1267   AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1268   AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1269   AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1270   AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1271   AC_TRY_COMPILE([#include <math.h>],
1272                  [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1273   AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1274   AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1275   AC_TRY_COMPILE([#include <math.h>],
1276                  [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1277   AC_TRY_COMPILE([#include <math.h>],
1278                  [isunordered(0.0,0.0);],, [ac_c99_math=no])
1279   AC_MSG_RESULT($ac_c99_math)
1280
1281   # Check for the existence in <stdio.h> of vscanf, et. al.
1282   ac_c99_stdio=yes;
1283   AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1284   AC_TRY_COMPILE([#include <stdio.h>],
1285                  [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1286   AC_TRY_COMPILE([#include <stdio.h>
1287                   #include <stdarg.h>
1288                   void foo(char* fmt, ...)
1289                   {va_list args; va_start(args, fmt);
1290                   vfscanf(stderr, "%i", args);}],
1291                   [],, [ac_c99_stdio=no])
1292   AC_TRY_COMPILE([#include <stdio.h>
1293                   #include <stdarg.h>
1294                   void foo(char* fmt, ...)
1295                   {va_list args; va_start(args, fmt);
1296                   vscanf("%i", args);}],
1297                   [],, [ac_c99_stdio=no])
1298   AC_TRY_COMPILE([#include <stdio.h>
1299                   #include <stdarg.h>
1300                   void foo(char* fmt, ...)
1301                   {va_list args; va_start(args, fmt);
1302                   vsnprintf(fmt, 0, "%i", args);}],
1303                   [],, [ac_c99_stdio=no])
1304   AC_TRY_COMPILE([#include <stdio.h>
1305                   #include <stdarg.h>
1306                   void foo(char* fmt, ...)
1307                   {va_list args; va_start(args, fmt);
1308                   vsscanf(fmt, "%i", args);}],
1309                   [],, [ac_c99_stdio=no])
1310   AC_MSG_RESULT($ac_c99_stdio)
1311
1312   # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1313   ac_c99_stdlib=yes;
1314   AC_MSG_CHECKING([for lldiv_t declaration])
1315   AC_CACHE_VAL(ac_c99_lldiv_t, [
1316   AC_TRY_COMPILE([#include <stdlib.h>],
1317                    [ lldiv_t mydivt;],
1318                    [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1319   ])
1320   AC_MSG_RESULT($ac_c99_lldiv_t)
1321
1322   AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1323   AC_TRY_COMPILE([#include <stdlib.h>],
1324                  [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1325   AC_TRY_COMPILE([#include <stdlib.h>],
1326                  [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1327   AC_TRY_COMPILE([#include <stdlib.h>],
1328                  [char* tmp; strtoll("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1329   AC_TRY_COMPILE([#include <stdlib.h>],
1330                  [char* tmp; strtoull("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1331   AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1332   AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1333   AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1334   AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1335   if test x"$ac_c99_lldiv_t" = x"no"; then
1336     ac_c99_stdlib=no;
1337   fi;
1338   AC_MSG_RESULT($ac_c99_stdlib)
1339
1340   # Check for the existence of <wchar.h> functions used if C99 is enabled.
1341   # XXX the wchar.h checks should be rolled into the general C99 bits.
1342   ac_c99_wchar=yes;
1343   AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1344   AC_TRY_COMPILE([#include <wchar.h>],
1345                  [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1346   AC_TRY_COMPILE([#include <wchar.h>],
1347                  [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1348   AC_TRY_COMPILE([#include <wchar.h>],
1349                  [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1350   AC_MSG_RESULT($ac_c99_wchar)
1351
1352   AC_MSG_CHECKING([for enabled ISO C99 support])
1353   if test x"$ac_c99_math" = x"no" ||
1354      test x"$ac_c99_stdio" = x"no" ||
1355      test x"$ac_c99_stdlib" = x"no" ||
1356      test x"$ac_c99_wchar" = x"no"; then
1357     enable_c99=no;
1358   fi;
1359   AC_MSG_RESULT($enable_c99)
1360
1361   # Option parsed, now set things appropriately
1362   if test x"$enable_c99" = x"yes"; then
1363     AC_DEFINE(_GLIBCPP_USE_C99)
1364   fi
1365
1366   AC_LANG_RESTORE
1367 ])
1368
1369
1370 dnl
1371 dnl Check for template specializations for the 'long long' type extension.
1372 dnl NB: Must check for C99 support before calling _GLIBCPP_ENABLE_LONG_LONG
1373 dnl
1374 dnl GLIBCPP_ENABLE_LONG_LONG
1375 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1376 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1377 dnl  +  Usage:  GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1378 dnl       Where DEFAULT is either `yes' or `no'.  If omitted, it
1379 dnl       defaults to `no'.
1380 dnl  +  If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1381 dnl
1382 dnl GLIBCPP_ENABLE_LONG_LONG
1383 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1384   define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1385
1386   AC_ARG_ENABLE(long-long,
1387   changequote(<<, >>)dnl
1388   <<--enable-long-long      turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1389   changequote([, ])dnl
1390   [case "$enableval" in
1391    yes) enable_long_long=yes ;;
1392    no)  enable_long_long=no ;;
1393    *)   AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1394    esac],
1395   enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1396
1397   # iostreams require strtoll, strtoull to compile. If the
1398   # GLIBCPP_ENABLE_C99 tests found these, and if C99 support is enabled,
1399   # go ahead and allow long long to be used.
1400   if test x"$enable_c99" = x"no"; then
1401     enable_long_long=no;
1402   fi
1403
1404   # Option parsed, now set things appropriately
1405   AC_MSG_CHECKING([for enabled long long support])
1406   if test x"$enable_long_long" = xyes; then
1407     AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1408   fi
1409   AC_MSG_RESULT($enable_long_long)
1410 ])
1411
1412
1413 dnl
1414 dnl Check for what kind of C headers to use.
1415 dnl
1416 dnl GLIBCPP_ENABLE_CHEADERS
1417 dnl --enable-cheaders= [does stuff].
1418 dnl --disable-cheaders [does not do anything, really].
1419 dnl  +  This will eventually need to be 'c_shadow' by default.
1420 dnl  +  Usage:  GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1421 dnl       Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1422 dnl       If ommitted, it defaults to `c_std'.
1423 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1424 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1425 AC_MSG_CHECKING([for c header strategy to use])
1426 AC_ARG_ENABLE(cheaders,
1427 changequote(<<, >>)dnl
1428 <<  --enable-cheaders       construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1429 changequote([, ])
1430   [case "$enableval" in
1431    c)
1432         enable_cheaders=c
1433         ;;
1434    c_std)
1435         enable_cheaders=c_std
1436         ;;
1437    c_shadow)
1438         enable_cheaders=c_shadow
1439         ;;
1440    *)   AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1441         ;;
1442   esac],
1443   enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1444   AC_MSG_RESULT($enable_cheaders)
1445
1446   dnl Option parsed, now set things appropriately
1447   case "$enable_cheaders" in
1448     c_shadow)
1449         CSHADOW_FLAGS="-fno-builtin"
1450         C_INCLUDE_DIR='${top_srcdir}/include/c_shadow'
1451         AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1452         ;;
1453     c_std)
1454         CSHADOW_FLAGS=""
1455         C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1456         ;;
1457     c)
1458         CSHADOW_FLAGS=""
1459         C_INCLUDE_DIR='${top_srcdir}/include/c'
1460         ;;
1461   esac
1462
1463   AC_SUBST(CSHADOW_FLAGS)
1464   AC_SUBST(C_INCLUDE_DIR)
1465   AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1466 ])
1467
1468
1469 dnl
1470 dnl Check for wide character support.  Has the same effect as the option
1471 dnl in gcc's configure, but in a form that autoconf can mess with.
1472 dnl
1473 dnl GLIBCPP_ENABLE_C_MBCHAR
1474 dnl --enable-c-mbchar requests all the wchar_t stuff.
1475 dnl --disable-c-mbchar doesn't.
1476 dnl  +  Usage:  GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1477 dnl       Where DEFAULT is either `yes' or `no'.  If ommitted, it
1478 dnl       defaults to `no'.
1479 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1480 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1481 AC_ARG_ENABLE(c-mbchar,
1482 changequote(<<, >>)dnl
1483 <<  --enable-c-mbchar       enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1484 changequote([, ])dnl
1485 [case "$enableval" in
1486  yes) enable_c_mbchar=yes ;;
1487  no)  enable_c_mbchar=no ;;
1488  *)   AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1489  esac],
1490 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1491 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1492 ])
1493
1494
1495 dnl
1496 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1497 dnl
1498 dnl GLIBCPP_INCLUDE_DIR
1499 dnl C_INCLUDE_DIR
1500 dnl TOPLEVEL_INCLUDES
1501 dnl LIBMATH_INCLUDES
1502 dnl LIBSUPCXX_INCLUDES
1503 dnl LIBIO_INCLUDES
1504 dnl CSHADOW_INCLUDES
1505 dnl
1506 dnl GLIBCPP_EXPORT_INCLUDE
1507 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1508   # Root level of the include sources.
1509   GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1510
1511   # Can either use include/c or include/c_std to grab "C" headers. This
1512   # variable is set to the include directory currently in use.
1513   # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_CHEADERS
1514
1515   # Passed down for canadian crosses.
1516   if  test x"$CANADIAN" = xyes; then
1517     TOPLEVEL_INCLUDES='-I$(includedir)'
1518   fi
1519
1520   LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1521
1522   LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1523
1524   #if GLIBCPP_NEED_LIBIO
1525   LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1526   #else
1527   #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1528   #endif
1529
1530   #if GLIBCPP_USE_CSHADOW
1531   #  CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1532   #                   -I$(top_blddir)/cshadow'
1533   #else
1534   CSTD_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1535   #endif
1536
1537   # Now, export this to all the little Makefiles....
1538   AC_SUBST(GLIBCPP_INCLUDE_DIR)
1539   AC_SUBST(TOPLEVEL_INCLUDES)
1540   AC_SUBST(LIBMATH_INCLUDES)
1541   AC_SUBST(LIBSUPCXX_INCLUDES)
1542   AC_SUBST(LIBIO_INCLUDES)
1543   AC_SUBST(CSTD_INCLUDES)
1544 ])
1545
1546
1547 dnl
1548 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1549 dnl
1550 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1551   # Optimization flags that are probably a good idea for thrill-seekers. Just
1552   # uncomment the lines below and make, everything else is ready to go...
1553   # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1554   OPTIMIZE_CXXFLAGS=
1555   AC_SUBST(OPTIMIZE_CXXFLAGS)
1556
1557   WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1558   AC_SUBST(WARN_FLAGS)
1559 ])
1560
1561 dnl
1562 dnl  GLIBCPP_EXPORT_INSTALL_INFO
1563 dnl  calculates gxx_install_dir
1564 dnl  exports glibcpp_toolexecdir
1565 dnl  exports glibcpp_toolexeclibdir
1566 dnl  exports glibcpp_builddir
1567 dnl  exports glibcpp_srcdir
1568 dnl  exports glibcpp_prefixdir
1569 dnl
1570 dnl Assumes cross_compiling bits already done, and with_cross_host in
1571 dnl particular
1572 dnl
1573 dnl GLIBCPP_EXPORT_INSTALL_INFO
1574 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1575
1576 glibcpp_toolexecdir=no
1577 glibcpp_toolexeclibdir=no
1578
1579 # Export build and source directories.
1580 # These need to be absolute paths, yet at the same time need to
1581 # canonicalize only relative paths, because then amd will not unmount
1582 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
1583 glibcpp_builddir=`pwd`
1584 case $srcdir in
1585 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
1586 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
1587 esac
1588 glibcpp_prefixdir=${prefix}
1589
1590 AC_MSG_CHECKING([for interface version number])
1591 libstdcxx_interface=$INTERFACE
1592 AC_MSG_RESULT($libstdcxx_interface)
1593
1594 # Process the option --with-gxx-include-dir=<path to include-files directory>
1595 AC_MSG_CHECKING([for --with-gxx-include-dir])
1596 AC_ARG_WITH(gxx-include-dir,
1597 [  --with-gxx-include-dir  the installation directory for include files],
1598 [case "${withval}" in
1599   yes)
1600     AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1601     gxx_include_dir=no
1602     ;;
1603   no)
1604     gxx_include_dir=no
1605     ;;
1606   *)
1607     gxx_include_dir=${withval}
1608     ;;
1609 esac], [gxx_include_dir=no])
1610 AC_MSG_RESULT($gxx_include_dir)
1611
1612 # Process the option "--enable-version-specific-runtime-libs"
1613 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1614 AC_ARG_ENABLE(version-specific-runtime-libs,
1615 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
1616 [  version_specific_libs=yes
1617 # Need the gcc compiler version to know where to install libraries
1618 # and header files if --enable-version-specific-runtime-libs option
1619 # is selected.
1620 changequote(,)dnl
1621 gcc_version_trigger=${srcdir}/../gcc/version.c
1622 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1623 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1624 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1625 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1626 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}
1627 changequote([,])dnl
1628 ],version_specific_libs=no)
1629 AC_MSG_RESULT($version_specific_libs)
1630
1631 # Default case for install directory for include files.
1632 if test x"$version_specific_libs" = x"no" \
1633    && test x"$gxx_include_dir" = x"no"; then
1634   gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1635 fi
1636
1637 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1638 # Install a library built with a cross compiler in tooldir, not libdir.
1639 if test x"$glibcpp_toolexecdir" = x"no"; then
1640   if test -n "$with_cross_host" &&
1641      test x"$with_cross_host" != x"no"; then
1642     glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1643     glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1644   else
1645     glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1646     glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1647   fi
1648 fi
1649
1650 AC_MSG_CHECKING([for install location])
1651 AC_MSG_RESULT($gxx_include_dir)
1652
1653 AC_SUBST(glibcpp_builddir)
1654 AC_SUBST(glibcpp_srcdir)
1655 AC_SUBST(glibcpp_prefixdir)
1656 AC_SUBST(gxx_include_dir)
1657 AC_SUBST(glibcpp_toolexecdir)
1658 AC_SUBST(glibcpp_toolexeclibdir)
1659 ])
1660
1661
1662 # Check whether LC_MESSAGES is available in <locale.h>.
1663 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1664 #
1665 # This file file be copied and used freely without restrictions.  It can
1666 # be used in projects which are not available under the GNU Public License
1667 # but which still want to provide support for the GNU gettext functionality.
1668 # Please note that the actual code is *not* freely available.
1669
1670 # serial 1
1671
1672 AC_DEFUN(AC_LC_MESSAGES, [
1673   AC_CHECK_HEADER(locale.h, [
1674     AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1675       [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1676        ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1677     if test $ac_cv_val_LC_MESSAGES = yes; then
1678       AC_DEFINE(HAVE_LC_MESSAGES)
1679     fi
1680   ])
1681 ])
1682
1683
1684 # Check for functions in math library.
1685 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1686 #
1687 # This file can be copied and used freely without restrictions.  It can
1688 # be used in projects which are not available under the GNU Public License
1689 # but which still want to provide support for the GNU gettext functionality.
1690 # Please note that the actual code is *not* freely available.
1691
1692 # serial 1
1693
1694 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1695 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1696 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1697 AC_SUBST(LIBMATHOBJS)dnl
1698 ])
1699
1700
1701 # Check for string functions.
1702 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1703 #
1704 # This file can be copied and used freely without restrictions.  It can
1705 # be used in projects which are not available under the GNU Public License
1706 # but which still want to provide support for the GNU gettext functionality.
1707 # Please note that the actual code is *not* freely available.
1708
1709 # serial 1
1710
1711 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1712 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1713 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1714 AC_SUBST(LIBSTRINGOBJS)dnl
1715 ])
1716
1717
1718 dnl This macro searches for a GNU version of make.  If a match is found, the
1719 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1720 dnl set to "#". This is useful for  including a special features in a Makefile,
1721 dnl which cannot be handled by other versions of make.  The variable
1722 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1723 dnl the empty string otherwise.
1724 dnl
1725 dnl Here is an example of its use:
1726 dnl
1727 dnl Makefile.in might contain:
1728 dnl
1729 dnl     # A failsafe way of putting a dependency rule into a makefile
1730 dnl     $(DEPEND):
1731 dnl             $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1732 dnl
1733 dnl     @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1734 dnl     @ifGNUmake@ include $(DEPEND)
1735 dnl     @ifGNUmake@ endif
1736 dnl
1737 dnl Then configure.in would normally contain:
1738 dnl
1739 dnl     CHECK_GNU_MAKE()
1740 dnl     AC_OUTPUT(Makefile)
1741 dnl
1742 dnl Then perhaps to cause gnu make to override any other make, we could do
1743 dnl something like this (note that GNU make always looks for GNUmakefile first):
1744 dnl
1745 dnl     if  ! test x$_cv_gnu_make_command = x ; then
1746 dnl             mv Makefile GNUmakefile
1747 dnl             echo .DEFAULT: > Makefile ;
1748 dnl             echo \  $_cv_gnu_make_command \$@ >> Makefile;
1749 dnl     fi
1750 dnl
1751 dnl Then, if any (well almost any) other make is called, and GNU make also
1752 dnl exists, then the other make wraps the GNU make.
1753 dnl
1754 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1755 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1756 dnl
1757 dnl #### Changes for libstdc++-v3:  reformatting and linewrapping; prepending
1758 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1759 dnl #### conditional's subshell (" --version" is not a command), using a
1760 dnl #### different option to grep(1).
1761 dnl #### -pme
1762 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1763 dnl #### ${MAKE:-make}).
1764 dnl #### -msokolov
1765 AC_DEFUN(
1766   GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1767           _cv_gnu_make_command='' ;
1768 dnl Search all the common names for GNU make
1769           for a in "${MAKE-make}" make gmake gnumake ; do
1770                   if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1771                   then
1772                           _cv_gnu_make_command=$a ;
1773                           break;
1774                   fi
1775           done ;
1776   ) ;
1777 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1778 dnl string, '#' otherwise
1779   if test  "x$_cv_gnu_make_command" != "x"  ; then
1780           ifGNUmake='' ;
1781   else
1782           ifGNUmake='#' ;
1783   fi
1784   AC_SUBST(ifGNUmake)
1785 ])
1786
1787 sinclude(../libtool.m4)
1788 dnl The lines below arrange for aclocal not to bring an installed
1789 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1790 dnl add a definition of LIBTOOL to Makefile.in.
1791 ifelse(,,,[AC_SUBST(LIBTOOL)
1792 AC_DEFUN([AM_PROG_LIBTOOL])
1793 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1794 AC_DEFUN([AC_PROG_LD])
1795 ])
1796
1797