configure.in

   1 Dnl Process this file with autoconf to produce a configure script.
   2 AC_REVISION([$CVSid$])
   3 AC_PREREQ(2.11)dnl              dnl Minimum Autoconf version required.
   4 AC_INIT(features.h)
   5 AC_CONFIG_HEADER(config.h)
   6
   7 # This will get text that should go into config.make.
   8 config_vars=
   9
  10 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
  11 AC_ARG_WITH(gmp, dnl
  12   --with-gmp=DIRECTORY    find GMP source code in DIRECTORY (not needed),
  13             [dnl
  14 case "$with_gmp" in
  15 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
  16 ''|no) ;;
  17 *) config_vars="$config_vars
  18 gmp-srcdir = $withval" ;;
  19 esac
  20 ])
  21 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
  22 AC_ARG_WITH(gettext, dnl
  23   --with-gettext=DIR      find GNU gettext source code in DIR (not needed),
  24             [dnl
  25 case "$with_gettext" in
  26 yes)
  27   AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
  28 ''|no) ;;
  29 *)
  30   config_vars="$config_vars
  31 gettext-srcdir = $withval" ;;
  32 esac
  33 ])
  34
  35 dnl Arguments to specify presence of other packages/features.
  36 AC_ARG_WITH(fp, dnl
  37 [  --with-fp              if using floating-point hardware [default=yes]],
  38             with_fp=$withval, with_fp=yes)
  39 AC_ARG_WITH(gnu-binutils, dnl
  40   --with-gnu-binutils     if using GNU binutils (as and ld),
  41             gnu_binutils=$withval, gnu_binutils=no)
  42 AC_ARG_WITH(gnu-ld, dnl
  43   --with-gnu-ld           if using GNU ld (in the binutils package),
  44             gnu_ld=$withval, gnu_ld=no)
  45 AC_ARG_WITH(gnu-as, dnl
  46   --with-gnu-as           if using GNU as (in the binutils package),
  47             gnu_as=$withval, gnu_as=no)
  48 test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes
  49 AC_ARG_WITH(elf, dnl
  50   --with-elf              if using the ELF object format,
  51             elf=$withval, elf=no)
  52
  53 AC_ARG_ENABLE(libio, dnl
  54 [  --enable-libio          build in GNU libio instead of GNU stdio],
  55               [if test $enableval = yes; then
  56                  stdio=libio
  57                else
  58                  stdio=stdio
  59                fi],
  60               stdio=default)
  61
  62 AC_ARG_ENABLE(new-malloc, dnl
  63 [  --enable-new-malloc    use the new malloc implementation.  This is the
  64                           default for Linux, others use the old malloc.],
  65               [if test $enableval = yes; then
  66                  malloc=new-malloc
  67                else
  68                  malloc=malloc
  69                fi],
  70               malloc=default)
  71
  72 AC_ARG_ENABLE(sanity-checks, dnl
  73 [  --disable-sanity-checks really do not use threads (should not be used
  74                           except in special situations) [default=yes]],
  75               enable_sanity=$enableval, enable_sanity=yes)
  76
  77 dnl Arguments to enable or disable building the shared, profiled, and
  78 dnl -fomit-frame-pointer libraries.
  79 AC_ARG_ENABLE(shared, dnl
  80 [  --enable-shared         build shared library [default=yes if GNU ld & ELF]],
  81               shared=$enableval, shared=default)
  82 AC_ARG_ENABLE(profile, dnl
  83 [  --enable-profile        build profiled library [default=yes]],
  84               profile=$enableval, profile=yes)
  85 AC_ARG_ENABLE(omitfp, dnl
  86 [  --enable-omitfp         build undebuggable optimized library [default=no]],
  87               omitfp=$enableval, omitfp=no)
  88
  89 dnl Generic infrastructure for drop-in additions to libc.
  90 AC_ARG_ENABLE(add-ons, dnl
  91 [  --enable-add-ons=DIR... configure and build named extra directories],
  92               [add_ons=`echo "$enableval" | sed 's/,/ /g'`],
  93               [add_ons=])
  94 AC_CONFIG_SUBDIRS($add_ons)
  95 add_ons_pfx=
  96 if test x"$add_ons" != x; then
  97   for f in $add_ons; do
  98     add_ons_pfx="$add_ons_pfx $f/"
  99   done
 100 fi
 101
 102 AC_CANONICAL_HOST
 103
 104 # The way shlib-versions is used to generate soversions.mk uses a
 105 # fairly simplistic model for name recognition that can't distinguish
 106 # i486-pc-linux-gnu fully from i486-pc-gnu.  So we mutate a $host_os
 107 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
 108 # tell.  This doesn't get used much beyond that, so it's fairly safe.
 109 case "$host_os" in
 110 linux*)
 111   ;;
 112 gnu*)
 113   host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
 114   ;;
 115 esac
 116
 117 # We keep the original values in `$config_*' and never modify them, so we
 118 # can write them unchanged into config.make.  Everything else uses
 119 # $machine, $vendor, and $os, and changes them whenever convenient.
 120 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
 121
 122 # Some configurations imply other options.
 123 case "$host_os" in
 124 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
 125   # These systems always use GNU tools.
 126   gnu_ld=yes gnu_as=yes ;;
 127 esac
 128 case "$host_os" in
 129 linux*ecoff*)
 130   ;;
 131 gnu* | linux* | sysv4* | solaris2*)
 132   # These systems (almost) always use the ELF format.
 133   elf=yes
 134   ;;
 135 esac
 136
 137 machine=$config_machine
 138 vendor=$config_vendor
 139 os=$config_os
 140
 141 dnl We need to use [ and ] for other purposes for a while now.
 142 changequote(,)dnl
 143 # Expand the configuration machine name into a subdirectory by architecture
 144 # type and particular chip.
 145 case "$machine" in
 146 a29k | am29000) base_machine=a29k machine=a29k ;;
 147 alpha*)         base_machine=alpha machine=alpha/$machine ;;
 148 hppa*)          base_machine=hppa machine=hppa/$machine ;;
 149 i[3456]86)      base_machine=i386 machine=i386/$machine ;;
 150 m680?0)         base_machine=m68k machine=m68k/$machine ;;
 151 m68k)           base_machine=m68k machine=m68k/m68020 ;;
 152 m88???)         base_machine=m88k machine=m88k/$machine ;;
 153 m88k)           base_machine=m88k machine=m88k/m88100 ;;
 154 mips*)          base_machine=mips machine=mips/$machine ;;
 155 mips64*)        base_machine=mips64 machine=mips/mips64/$machine ;;
 156 sparc[6789])    base_machine=sparc machine=sparc/$machine ;;
 157 supersparc)     base_machine=sparc machine=sparc/sparc8 ;;
 158 esac
 159 changequote([,])dnl
 160 AC_SUBST(base_machine)
 161
 162 # Compute the list of sysdep directories for this configuration.
 163 # This can take a while to compute.
 164 sysdep_dir=$srcdir/sysdeps
 165 AC_MSG_CHECKING(sysdep dirs)
 166 dnl We need to use [ and ] for other purposes for a while now.
 167 changequote(,)dnl
 168 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
 169 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
 170
 171 case "$os" in
 172 gnu*)
 173   base_os=mach/hurd ;;
 174 netbsd* | 386bsd* | freebsd* | bsdi*)
 175   base_os=unix/bsd/bsd4.4 ;;
 176 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
 177   base_os=unix/bsd ;;
 178 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
 179   base_os=unix/sysv ;;
 180 solaris[2-9]*)
 181   base_os=unix/sysv/sysv4 ;;
 182 none)
 183   base_os=standalone ;;
 184 *)
 185   base_os='' ;;
 186 esac
 187
 188 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
 189 tail=$os
 190 ostry=$os
 191 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
 192   ostry="$ostry /$o"
 193   tail=$o
 194 done
 195 o=`echo $tail | sed 's/[0-9]*$//'`
 196 if test $o != $tail; then
 197   ostry="$ostry /$o"
 198 fi
 199 # For linux-gnu, try linux-gnu, then linux.
 200 o=`echo $tail | sed 's/-.*$//'`
 201 if test $o != $tail; then
 202   ostry="$ostry /$o"
 203 fi
 204
 205 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
 206 base=
 207 tail=$base_os
 208 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
 209   set $b
 210   base="$base /$1"
 211   tail="$2"
 212 done
 213
 214 # For sparc/sparc9, try sparc/sparc9 and then sparc.
 215 mach=
 216 tail=$machine
 217 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
 218   set $m
 219   # Prepend the machine's FPU directory unless --without-fp.
 220   if test "$with_fp" = yes; then
 221     mach="$mach /$1/fpu"
 222   fi
 223   mach="$mach /$1"
 224   tail="$2"
 225 done
 226
 227 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
 228 changequote([,])dnl
 229
 230 # Find what sysdep directories exist.
 231 sysnames=
 232 IFS="${IFS=     }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
 233 for d in $add_ons_pfx ''; do
 234   for b in $base ''; do
 235     for m0 in $mach ''; do
 236       for v in /$vendor ''; do
 237         for o in /$ostry ''; do
 238           for m in $mach ''; do
 239             if test "$m0$b$v$o$m"; then
 240               try="${d}sysdeps$m0$b$v$o$m"
 241               test -n "$enable_debug_configure" &&
 242               echo "$0 [DEBUG]: try $try" >&2
 243               case $try in
 244                 /*) dest=$try ;;
 245                 *)  dest=$srcdir/$try ;;
 246               esac
 247               if test -d $dest; then
 248                 sysnames="$sysnames $try"
 249                 { test -n "$o" || test -n "$b"; } && os_used=t
 250                 { test -n "$m" || test -n "$m0"; } && machine_used=t
 251               fi
 252             fi
 253           done
 254         done
 255       done
 256     done
 257   done
 258 done
 259 IFS="$ac_save_ifs"
 260
 261 if test -z "$os_used" && test "$os" != none; then
 262   AC_MSG_ERROR(Operating system $os is not supported.)
 263 fi
 264 if test -z "$machine_used" && test "$machine" != none; then
 265   AC_MSG_ERROR(The $machine is not supported.)
 266 fi
 267
 268 # We have now validated the configuration.
 269
 270
 271 # If using ELF, look for an `elf' subdirectory of each machine directory.
 272 # We prepend these rather than inserting them whereever the machine appears
 273 # because things specified by the machine's ELF ABI should override
 274 # OS-specific things, and should always be the same for any OS on the
 275 # machine (otherwise what's the point of an ABI?).
 276 if test "$elf" = yes; then
 277   elf_dirs=
 278   for d in $add_ons_pfx ''; do
 279     case $d in
 280       /*) xsrcdir= ;;
 281       *)  xsrcdir=$srcdir/ ;;
 282     esac
 283     for m in $mach; do
 284       if test -d $xsrcdir${d}sysdeps$m/elf; then
 285         elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
 286       fi
 287     done
 288   done
 289   sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
 290 fi
 291
 292
 293 # Expand the list of system names into a full list of directories
 294 # from each element's parent name and Implies file (if present).
 295 set $sysnames
 296 names=
 297 while test $# -gt 0; do
 298   name=$1
 299   shift
 300
 301   case " $names " in *" $name "*)
 302     # Already in the list.
 303     continue
 304   esac
 305
 306   # Report each name as we discover it, so there is no long pause in output.
 307   echo $ac_n "$name $ac_c" >&AC_FD_MSG
 308
 309   name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
 310
 311   case $name in
 312     /*) xsrcdir= ;;
 313     *)  xsrcdir=$srcdir/ ;;
 314   esac
 315   test -n "$enable_debug_configure" &&
 316   echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
 317
 318   if test -f $xsrcdir$name/Implies; then
 319     # Collect more names from the `Implies' file (removing comments).
 320     implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
 321     implied=
 322     for x in $implied_candidate; do
 323       if test -d $xsrcdir$name_base/$x; then
 324         implied="$implied $name_base/$x";
 325       else
 326         AC_MSG_WARN($name/Implies specifies nonexistent $x)
 327       fi
 328     done
 329   else
 330     implied=
 331   fi
 332
 333   # Add NAME to the list of names.
 334   names="$names $name"
 335
 336   # Find the parent of NAME, using the empty string if it has none.
 337 changequote(,)dnl
 338   parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
 339 changequote([,])dnl
 340
 341   # Add the names implied by NAME, and NAME's parent (if it has one), to
 342   # the list of names to be processed (the argument list).  We prepend the
 343   # implied names to the list and append the parent.  We want implied
 344   # directories to come before further directories inferred from the
 345   # configuration components; this ensures that for sysv4, unix/common
 346   # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
 347   # after sysv4).
 348   sysnames="`echo $implied $* $parent`"
 349   test -n "$sysnames" && set $sysnames
 350 done
 351
 352 # Add the default directories.
 353 sysnames="$names sysdeps/generic sysdeps/stub"
 354 AC_SUBST(sysnames)
 355 # The other names were emitted during the scan.
 356 AC_MSG_RESULT(sysdeps/generic sysdeps/stub)
 357
 358
 359 ### Locate tools.
 360
 361 AC_PROG_INSTALL
 362 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
 363   # The makefiles need to use a different form to find it in $srcdir.
 364   INSTALL='$(..)./install-sh -c'
 365 fi
 366 AC_PROG_LN_S
 367 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
 368
 369 AC_CHECK_TOOL(CC, gcc)
 370 if test $host != $build; then
 371   AC_CHECK_PROG(BUILD_CC, gcc cc)
 372 fi
 373 AC_PROG_CPP
 374 AC_CHECK_TOOL(AR, ar)
 375 AC_CHECK_TOOL(RANLIB, ranlib, :)
 376
 377 AC_PATH_PROG(BASH, bash, no)
 378 if test "$BASH" != no &&
 379    $BASH -c 'test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
 380   libc_cv_have_bash2=yes
 381 else
 382   libc_cv_have_bash2=no
 383 fi
 384 AC_SUBST(libc_cv_have_bash2)
 385
 386 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
 387 echo '#include <stddef.h>
 388 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
 389 if eval "$ac_cpp conftest.c 2>/dev/null" \
 390 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
 391   libc_cv_signed_size_t=no
 392 else
 393   libc_cv_signed_size_t=yes
 394 fi
 395 rm -f conftest*])
 396 if test $libc_cv_signed_size_t = yes; then
 397   dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
 398   cat >> confdefs.h <<\EOF
 399 #undef __SIZE_TYPE__
 400 #define __SIZE_TYPE__ unsigned
 401 EOF
 402 fi
 403
 404 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
 405 AC_TRY_COMPILE(dnl
 406 [#define __need_size_t
 407 #define __need_wchar_t
 408 #include <stddef.h>
 409 #define __need_NULL
 410 #include <stddef.h>], [size_t size; wchar_t wchar;
 411 #ifdef offsetof
 412 #error stddef.h ignored __need_*
 413 #endif
 414 if (&size == NULL || &wchar == NULL) abort ();],
 415                libc_cv_friendly_stddef=yes,
 416                libc_cv_friendly_stddef=no)])
 417 if test $libc_cv_friendly_stddef = yes; then
 418   config_vars="$config_vars
 419 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
 420 fi
 421
 422 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
 423                libc_cv_need_minus_P, [dnl
 424 cat > conftest.S <<EOF
 425 #include "confdefs.h"
 426 /* Nothing whatsoever.  */
 427 EOF
 428 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
 429   libc_cv_need_minus_P=no
 430 else
 431   libc_cv_need_minus_P=yes
 432 fi
 433 rm -f conftest*])
 434 if test $libc_cv_need_minus_P = yes; then
 435   config_vars="$config_vars
 436 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
 437 fi
 438
 439 AC_CACHE_CHECK(for assembler global-symbol directive,
 440                libc_cv_asm_global_directive, [dnl
 441 libc_cv_asm_global_directive=UNKNOWN
 442 for ac_globl in .globl .global; do
 443   cat > conftest.s <<EOF
 444 .text
 445 ${ac_globl} foo
 446 foo: .long 0
 447 EOF
 448   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 449     libc_cv_asm_global_directive=${ac_globl}
 450   fi
 451   rm -f conftest*
 452   test $libc_cv_asm_global_directive != UNKNOWN && break
 453 done])
 454 if test $libc_cv_asm_global_directive = UNKNOWN; then
 455   AC_MSG_ERROR(cannot determine asm global directive)
 456 else
 457   AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
 458 fi
 459
 460 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
 461 cat > conftest.s <<EOF
 462 .text
 463 foo: .long 0
 464 .set glibc_conftest_frobozz,foo
 465 $libc_cv_asm_global_directive glibc_conftest_frobozz
 466 EOF
 467 # The alpha-dec-osf1 assembler gives only a warning for `.set'
 468 # (but it doesn't work), so we must do a linking check to be sure.
 469 cat > conftest1.c <<\EOF
 470 extern int glibc_conftest_frobozz;
 471 main () { printf ("%d\n", glibc_conftest_frobozz); }
 472 EOF
 473 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
 474             -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
 475   libc_cv_asm_set_directive=yes
 476 else
 477   libc_cv_asm_set_directive=no
 478 fi
 479 rm -f conftest*])
 480 if test $libc_cv_asm_set_directive = yes; then
 481   AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
 482 fi
 483
 484 if test $elf != yes; then
 485   AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
 486                  [AC_TRY_COMPILE(, [asm (".section .init");
 487                                     asm (".section .fini");
 488                                     asm (".text");],
 489                                  libc_cv_have_initfini=yes,
 490                                  libc_cv_have_initfini=no)])
 491   AC_SUBST(libc_cv_have_initfini)dnl
 492   if test $libc_cv_have_initfini = yes; then
 493     AC_DEFINE(HAVE_INITFINI)
 494   fi
 495 fi
 496
 497 if test $elf = yes; then
 498   libc_cv_asm_underscores=no
 499 else
 500   AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
 501                  [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
 502                               libc_cv_asm_underscores=yes,
 503                               libc_cv_asm_underscores=no)])
 504 fi
 505 if test $libc_cv_asm_underscores = no; then
 506   AC_DEFINE(NO_UNDERSCORES)
 507 fi
 508
 509 if test $elf = yes; then
 510   libc_cv_weak_symbols=yes
 511   libc_cv_asm_weak_directive=yes
 512   libc_cv_asm_weakext_directive=no
 513 else
 514   AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
 515                  [dnl
 516 cat > conftest.s <<EOF
 517 .text
 518 ${libc_cv_asm_global_directive} foo
 519 foo: .long 0
 520 .weak foo
 521 .weak bar; bar = foo
 522 EOF
 523   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 524     libc_cv_asm_weak_directive=yes
 525   else
 526     libc_cv_asm_weak_directive=no
 527   fi
 528   rm -f conftest*])
 529
 530 if test $libc_cv_asm_weak_directive = no; then
 531   AC_CACHE_CHECK(for assembler .weakext directive,
 532                  libc_cv_asm_weakext_directive,
 533                  [dnl
 534 cat > conftest.s <<EOF
 535 .text
 536 ${libc_cv_asm_global_directive} foo
 537 foo: .long 0
 538 .weakext foo
 539 .weakext foo, bar
 540 EOF
 541   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 542     libc_cv_asm_weakext_directive=yes
 543   else
 544     libc_cv_asm_weakext_directive=no
 545   fi
 546   rm -f conftest*])
 547
 548   fi # no .weak
 549 fi # not ELF
 550
 551 if test $libc_cv_asm_weak_directive = yes; then
 552   AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
 553 elif test $libc_cv_asm_weakext_directive = yes; then
 554   AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
 555 fi
 556
 557 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
 558 cat > conftest.c <<\EOF
 559 _start () {}
 560 int __eh_pc;
 561 __throw () {}
 562 EOF
 563 dnl No \ in command here because it ends up inside ''.
 564 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
 565                             -nostdlib -nostartfiles -Wl,--no-whole-archive
 566                             -o conftest conftest.c]); then
 567   libc_cv_ld_no_whole_archive=yes
 568 else
 569   libc_cv_ld_no_whole_archive=no
 570 fi
 571 rm -f conftest*])
 572 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
 573
 574 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
 575 cat > conftest.c <<\EOF
 576 _start () {}
 577 int __eh_pc;
 578 __throw () {}
 579 EOF
 580 dnl No \ in command here because it ends up inside ''.
 581 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
 582                             -nostdlib -nostartfiles -fno-exceptions
 583                             -o conftest conftest.c]); then
 584   libc_cv_gcc_no_exceptions=yes
 585 else
 586   libc_cv_gcc_no_exceptions=no
 587 fi
 588 rm -f conftest*])
 589 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
 590
 591 ### End of automated tests.
 592 ### Now run sysdeps configure fragments.
 593
 594 # sysdeps configure fragments may set these with files to be linked below.
 595 libc_link_dests=
 596 libc_link_sources=
 597
 598 # Iterate over all the sysdep directories we will use, running their
 599 # configure fragments, and looking for a uname implementation.
 600 uname=
 601 for dir in $sysnames; do
 602   case $dir in
 603     /*) dest=$dir ;;
 604     *)  dest=$srcdir/$dir ;;
 605   esac
 606   if test -r $dest/configure; then
 607     AC_MSG_RESULT(running configure fragment for $dest)
 608     . $dest/configure
 609   fi
 610 [
 611   if test -z "$uname"; then
 612     if test -r $sysdep_dir/$dir/uname.c ||
 613        test -r $sysdep_dir/$dir/uname.S ||
 614        { test -r $sysdep_dir/$dir/syscalls.list &&
 615          grep '^uname[  ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then
 616       uname=$dir
 617     fi
 618   fi
 619 ]dnl
 620 done
 621
 622 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
 623
 624 # If we will use the generic uname implementation, we must figure out what
 625 # it will say by examining the system, and write the results in config-name.h.
 626 if test "$uname" = generic; then
 627
 628 changequote(,)dnl
 629   uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
 630 changequote([,])dnl
 631   if test $uname_sysname != $config_os; then
 632     config_release=`echo $config_os | sed s/$uname_sysname//`
 633   fi
 634 dnl
 635 AC_DEFUN(LIBC_KERNEL_ID, [dnl
 636     if test -r /vmunix; then
 637       kernel_id=`strings /vmunix | grep UNIX`
 638     elif test -r /dynix; then
 639       kernel_id=`strings /dynix | grep DYNIX`
 640     else
 641       kernel_id=
 642     fi
 643 ])dnl
 644
 645   AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
 646 AC_REQUIRE([LIBC_KERNEL_ID])dnl
 647 changequote(,)dnl
 648   kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
 649 changequote([,])dnl
 650   if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
 651          != x$config_release; then
 652     # The configuration release is a substring of the kernel release.
 653     libc_cv_uname_release=$kernel_release
 654   elif test x$config_release != x; then
 655     libc_cv_uname_release=$config_release
 656   elif test x$kernel_release != x; then
 657     libc_cv_uname_release=$kernel_release
 658   else
 659     libc_cv_uname_release=unknown
 660   fi])
 661   uname_release="$libc_cv_uname_release"
 662
 663   AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
 664 AC_REQUIRE([LIBC_KERNEL_ID])dnl
 665 changequote(,)dnl
 666   kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
 667 changequote([,])dnl
 668   if test -n "$kernel_version"; then
 669     libc_cv_uname_version="$kernel_version"
 670   else
 671     libc_cv_uname_version=unknown
 672   fi])
 673   uname_version="$libc_cv_uname_version"
 674
 675 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
 676   config_uname=config-name.h:config-name.in
 677 else
 678   # For non-generic uname, we don't need to create config-name.h at all.
 679   config_uname=
 680 fi
 681
 682 AC_MSG_CHECKING(stdio selection)
 683 AC_SUBST(stdio)
 684 case $stdio in
 685 libio) AC_DEFINE(USE_IN_LIBIO) ;;
 686 default) stdio=stdio ;;
 687 esac
 688 AC_MSG_RESULT($stdio)
 689
 690 AC_MSG_CHECKING(malloc selection)
 691 AC_SUBST(malloc)
 692 case $malloc in
 693 new-malloc) USE_NEW_MALLOC=-DUSE_NEW_MALLOC ;;
 694 default) malloc=malloc ;;
 695 esac
 696 AC_SUBST(USE_NEW_MALLOC)
 697 AC_MSG_RESULT($malloc)
 698
 699
 700 AC_SUBST(libc_cv_slibdir)
 701 AC_SUBST(libc_cv_sysconfdir)
 702
 703 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
 704 if test $gnu_ld = yes; then
 705   AC_DEFINE(HAVE_GNU_LD)
 706 fi
 707 if test $gnu_as = yes; then
 708   AC_DEFINE(HAVE_GNU_AS)
 709 fi
 710 if test $elf = yes; then
 711   AC_DEFINE(HAVE_ELF)
 712 fi
 713
 714 AC_SUBST(shared)
 715 if test $shared = default; then
 716   if test $gnu_ld = yes; then
 717     shared=$elf
 718   else
 719     # For now we do not assume shared libs are available.  In future more
 720     # tests might become available.
 721     shared=no
 722   fi
 723 fi
 724 AC_SUBST(profile)
 725 AC_SUBST(omitfp)
 726
 727 AC_SUBST(DEFINES)
 728
 729 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
 730   config_makefile=
 731 else
 732   config_makefile=Makefile
 733 fi
 734
 735 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
 736 AC_SUBST(VERSION)
 737
 738 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
 739           [echo '$config_vars' >> config.make])