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(include/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(binutils, dnl
  40   --with-binutils=PATH    specify location of binutils (as and ld),
  41             path_binutils=$withval, path_binutils='')
  42 AC_ARG_WITH(elf, dnl
  43   --with-elf              if using the ELF object format,
  44             elf=$withval, elf=no)
  45
  46 AC_ARG_ENABLE(libio, dnl
  47 [  --enable-libio          build in GNU libio instead of GNU stdio],
  48               [if test $enableval = yes; then
  49                  stdio=libio
  50                else
  51                  stdio=stdio
  52                fi],
  53               stdio=default)
  54
  55 AC_ARG_ENABLE(sanity-checks, dnl
  56 [  --disable-sanity-checks really do not use threads (should not be used
  57                           except in special situations) [default=yes]],
  58               enable_sanity=$enableval, enable_sanity=yes)
  59
  60 dnl Arguments to enable or disable building the static, shared, profiled,
  61 dnl and -fomit-frame-pointer libraries.
  62 AC_ARG_ENABLE(static, dnl
  63 [  --enable-static         build static library [default=yes]],
  64               static=$enableval, static=yes)
  65 AC_ARG_ENABLE(shared, dnl
  66 [  --enable-shared         build shared library [default=yes if GNU ld & ELF]],
  67               shared=$enableval, shared=default)
  68 AC_ARG_ENABLE(profile, dnl
  69 [  --enable-profile        build profiled library [default=yes]],
  70               profile=$enableval, profile=yes)
  71 AC_ARG_ENABLE(omitfp, dnl
  72 [  --enable-omitfp         build undebuggable optimized library [default=no]],
  73               omitfp=$enableval, omitfp=no)
  74 AC_ARG_ENABLE(bounded, dnl
  75 [  --enable-bounded        build with runtime bounds checking [default=no]],
  76               bounded=$enableval, bounded=no)
  77 AC_ARG_ENABLE(versioning, dnl
  78 [  --disable-versioning    do not include versioning information in the
  79                           library objects [default=yes if supported]],
  80              enable_versioning=$enableval, enable_versioning=yes)
  81
  82 dnl Generic infrastructure for drop-in additions to libc.
  83 AC_ARG_ENABLE(add-ons, dnl
  84 [  --enable-add-ons=DIR... configure and build named extra directories],
  85               [add_ons=`echo "$enableval" | sed 's/,/ /g'`],
  86               [add_ons=])
  87 AC_CONFIG_SUBDIRS($add_ons)
  88 add_ons_pfx=
  89 if test x"$add_ons" != x; then
  90   for f in $add_ons; do
  91     # Test whether such a subdir really exists.
  92     if test -d $srcdir/$f; then
  93       add_ons_pfx="$add_ons_pfx $f/"
  94     else
  95       AC_MSG_ERROR(add-on directory \"$f\" does not exist)
  96     fi
  97   done
  98 fi
  99
 100 dnl On some platforms we cannot use dynamic loading.  We must provide
 101 dnl static NSS modules.
 102 AC_ARG_ENABLE(static-nss, dnl
 103 [  --enable-static-nss     build static NSS modules [default=no]],
 104               static_nss=$enableval, static_nss=no)
 105 if test x"$static_nss" = xyes; then
 106   AC_DEFINE(DO_STATIC_NSS)
 107 fi
 108
 109 AC_CANONICAL_HOST
 110
 111 # The way shlib-versions is used to generate soversions.mk uses a
 112 # fairly simplistic model for name recognition that can't distinguish
 113 # i486-pc-linux-gnu fully from i486-pc-gnu.  So we mutate a $host_os
 114 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
 115 # tell.  This doesn't get used much beyond that, so it's fairly safe.
 116 case "$host_os" in
 117 linux*)
 118   ;;
 119 gnu*)
 120   host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
 121   ;;
 122 esac
 123
 124 ###
 125 ### I put this here to prevent those annoying emails from people who cannot
 126 ### read and try to compile glibc on unsupported platforms.  --drepper
 127 ###
 128 ### By using the undocumented --enable-hacker-mode option for configure
 129 ### one can skip this test to make the configuration not fail for unsupported
 130 ### platforms.
 131 ###
 132 if test -z "$enable_hacker_mode"; then
 133   case "$host_os" in
 134   linux* | gnu*)
 135     ;;
 136   *)
 137     echo "*** The GNU C library is currently not available for this platform."
 138     echo "*** So far nobody cared to port it and if there is no volunteer it"
 139     echo "*** might never happen.  So, if you have interest to see glibc on"
 140     echo "*** this platform visit"
 141     echo "***   http://www.gnu.ai.mit.edu/software/libc/porting.html"
 142     echo "*** and join the group of porters"
 143     exit 1
 144     ;;
 145   esac
 146 fi
 147
 148 # We keep the original values in `$config_*' and never modify them, so we
 149 # can write them unchanged into config.make.  Everything else uses
 150 # $machine, $vendor, and $os, and changes them whenever convenient.
 151 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
 152
 153 # Some configurations imply other options.
 154 case "$host_os" in
 155 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
 156   # These systems always use GNU tools.
 157   gnu_ld=yes gnu_as=yes ;;
 158 esac
 159 case "$host_os" in
 160 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
 161 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
 162   ;;
 163 gnu* | linux* | sysv4* | solaris2*)
 164   # These systems (almost) always use the ELF format.
 165   elf=yes
 166   ;;
 167 esac
 168
 169 machine=$config_machine
 170 vendor=$config_vendor
 171 os=$config_os
 172
 173 dnl We need to use [ and ] for other purposes for a while now.
 174 changequote(,)dnl
 175 # Expand the configuration machine name into a subdirectory by architecture
 176 # type and particular chip.
 177 case "$machine" in
 178 a29k | am29000) base_machine=a29k machine=a29k ;;
 179 alpha*)         base_machine=alpha machine=alpha/$machine ;;
 180 arm*)           base_machine=arm machine=arm/$machine ;;
 181 c3[012])        base_machine=cx0 machine=cx0/c30 ;;
 182 c4[04])         base_machine=cx0 machine=cx0/c40 ;;
 183 hppa*)          base_machine=hppa machine=hppa/$machine ;;
 184 i[3456]86)      base_machine=i386 machine=i386/$machine ;;
 185 m680?0)         base_machine=m68k machine=m68k/$machine ;;
 186 m68k)           base_machine=m68k machine=m68k/m68020 ;;
 187 m88???)         base_machine=m88k machine=m88k/$machine ;;
 188 m88k)           base_machine=m88k machine=m88k/m88100 ;;
 189 mips64*)        base_machine=mips64 machine=mips/mips64/$machine ;;
 190 mips*)          base_machine=mips machine=mips/$machine ;;
 191 sparc | sparcv[67])
 192                 base_machine=sparc machine=sparc/sparc32 ;;
 193 sparcv8 | supersparc | hypersparc)
 194                 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
 195 sparc64 | ultrasparc)
 196                 base_machine=sparc machine=sparc/sparc64 ;;
 197 esac
 198 changequote([,])dnl
 199 AC_SUBST(base_machine)
 200
 201 if test "$base_machine" = "i386"; then
 202   AC_DEFINE(USE_REGPARMS)
 203 fi
 204
 205 # Compute the list of sysdep directories for this configuration.
 206 # This can take a while to compute.
 207 sysdep_dir=$srcdir/sysdeps
 208 AC_MSG_CHECKING(sysdep dirs)
 209 dnl We need to use [ and ] for other purposes for a while now.
 210 changequote(,)dnl
 211 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
 212 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
 213
 214 case "$os" in
 215 gnu*)
 216   base_os=mach/hurd ;;
 217 netbsd* | 386bsd* | freebsd* | bsdi*)
 218   base_os=unix/bsd/bsd4.4 ;;
 219 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
 220   base_os=unix/bsd ;;
 221 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
 222   base_os=unix/sysv ;;
 223 solaris[2-9]*)
 224   base_os=unix/sysv/sysv4 ;;
 225 none)
 226   base_os=standalone ;;
 227 *)
 228   base_os='' ;;
 229 esac
 230
 231 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
 232 tail=$os
 233 ostry=$os
 234 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
 235   ostry="$ostry /$o"
 236   tail=$o
 237 done
 238 o=`echo $tail | sed 's/[0-9]*$//'`
 239 if test $o != $tail; then
 240   ostry="$ostry /$o"
 241 fi
 242 # For linux-gnu, try linux-gnu, then linux.
 243 o=`echo $tail | sed 's/-.*$//'`
 244 if test $o != $tail; then
 245   ostry="$ostry /$o"
 246 fi
 247
 248 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
 249 base=
 250 tail=$base_os
 251 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
 252   set $b
 253   base="$base /$1"
 254   tail="$2"
 255 done
 256
 257 # For sparc/sparc9, try sparc/sparc9 and then sparc.
 258 mach=
 259 tail=$machine
 260 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
 261   set $m
 262   # Prepend the machine's FPU directory unless --without-fp.
 263   if test "$with_fp" = yes; then
 264     mach="$mach /$1/fpu"
 265   fi
 266   mach="$mach /$1"
 267   tail="$2"
 268 done
 269
 270 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
 271 changequote([,])dnl
 272
 273 # Find what sysdep directories exist.
 274 sysnames=
 275 IFS="${IFS=     }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
 276 for d in $add_ons_pfx ''; do
 277   for b in $base ''; do
 278     for m0 in $mach ''; do
 279       for v in /$vendor ''; do
 280         for o in /$ostry ''; do
 281           for m in $mach ''; do
 282             if test "$m0$b$v$o$m"; then
 283               try="${d}sysdeps$m0$b$v$o$m"
 284               test -n "$enable_debug_configure" &&
 285               echo "$0 [DEBUG]: try $try" >&2
 286               case $try in
 287                 /*) dest=$try ;;
 288                 *)  dest=$srcdir/$try ;;
 289               esac
 290               if test -d $dest; then
 291                 sysnames="$sysnames $try"
 292                 { test -n "$o" || test -n "$b"; } && os_used=t
 293                 { test -n "$m" || test -n "$m0"; } && machine_used=t
 294               fi
 295             fi
 296           done
 297         done
 298       done
 299     done
 300   done
 301 done
 302 IFS="$ac_save_ifs"
 303
 304 if test -z "$os_used" && test "$os" != none; then
 305   AC_MSG_ERROR(Operating system $os is not supported.)
 306 fi
 307 if test -z "$machine_used" && test "$machine" != none; then
 308   AC_MSG_ERROR(The $machine is not supported.)
 309 fi
 310
 311 # We have now validated the configuration.
 312
 313
 314 # If using ELF, look for an `elf' subdirectory of each machine directory.
 315 # We prepend these rather than inserting them whereever the machine appears
 316 # because things specified by the machine's ELF ABI should override
 317 # OS-specific things, and should always be the same for any OS on the
 318 # machine (otherwise what's the point of an ABI?).
 319 if test "$elf" = yes; then
 320   elf_dirs=
 321   for d in $add_ons_pfx ''; do
 322     case $d in
 323       /*) xsrcdir= ;;
 324       *)  xsrcdir=$srcdir/ ;;
 325     esac
 326     for m in $mach; do
 327       if test -d $xsrcdir${d}sysdeps$m/elf; then
 328         elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
 329       fi
 330     done
 331   done
 332   sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
 333 fi
 334
 335
 336 # Expand the list of system names into a full list of directories
 337 # from each element's parent name and Implies file (if present).
 338 set $sysnames
 339 names=
 340 while test $# -gt 0; do
 341   name=$1
 342   shift
 343
 344   case " $names " in *" $name "*)
 345     # Already in the list.
 346     continue
 347   esac
 348
 349   # Report each name as we discover it, so there is no long pause in output.
 350   echo $ac_n "$name $ac_c" >&AC_FD_MSG
 351
 352   name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
 353
 354   case $name in
 355     /*) xsrcdir= ;;
 356     *)  xsrcdir=$srcdir/ ;;
 357   esac
 358   test -n "$enable_debug_configure" &&
 359   echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
 360
 361   if test -f $xsrcdir$name/Implies; then
 362     # Collect more names from the `Implies' file (removing comments).
 363     implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
 364     implied=
 365     for x in $implied_candidate; do
 366       if test -d $xsrcdir$name_base/$x; then
 367         implied="$implied $name_base/$x";
 368       else
 369         AC_MSG_WARN($name/Implies specifies nonexistent $x)
 370       fi
 371     done
 372   else
 373     implied=
 374   fi
 375
 376   # Add NAME to the list of names.
 377   names="$names $name"
 378
 379   # Find the parent of NAME, using the empty string if it has none.
 380 changequote(,)dnl
 381   parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
 382 changequote([,])dnl
 383
 384   # Add the names implied by NAME, and NAME's parent (if it has one), to
 385   # the list of names to be processed (the argument list).  We prepend the
 386   # implied names to the list and append the parent.  We want implied
 387   # directories to come before further directories inferred from the
 388   # configuration components; this ensures that for sysv4, unix/common
 389   # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
 390   # after sysv4).
 391   sysnames="`echo $implied $* $parent`"
 392   test -n "$sysnames" && set $sysnames
 393 done
 394
 395 # Add the default directories.
 396 sysnames="$names sysdeps/generic"
 397 AC_SUBST(sysnames)
 398 # The other names were emitted during the scan.
 399 AC_MSG_RESULT(sysdeps/generic)
 400
 401
 402 ### Locate tools.
 403
 404 AC_PROG_INSTALL
 405 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
 406   # The makefiles need to use a different form to find it in $srcdir.
 407   INSTALL='\$(..)./install-sh -c'
 408 fi
 409 AC_PROG_LN_S
 410 AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
 411
 412 AC_PROG_CC_LOCAL
 413 AC_CANONICAL_BUILD
 414 if test $host != $build; then
 415   AC_CHECK_PROGS(BUILD_CC, gcc cc)
 416 fi
 417 AC_SUBST(cross_compiling)
 418 AC_PROG_CPP
 419 LIBC_PROG_BINUTILS
 420 AC_CHECK_TOOL(AR, ar)
 421 AC_CHECK_TOOL(RANLIB, ranlib, :)
 422
 423 AC_PATH_PROG(BASH, bash, no)
 424 if test "$BASH" != no &&
 425    $BASH -c 'test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
 426   libc_cv_have_bash2=yes
 427 else
 428   libc_cv_have_bash2=no
 429 fi
 430 AC_SUBST(libc_cv_have_bash2)
 431
 432 dnl We need a ksh compatible shell for tzselect.
 433 if test "$BASH" = no; then
 434   AC_PATH_PROG(KSH, ksh, no)
 435   if test "$KSH" = no; then
 436     libc_cv_have_ksh=no
 437   else
 438     libc_cv_have_ksh=yes
 439   fi
 440 else
 441   KSH="$BASH"
 442   AC_SUBST(KSH)
 443   libc_cv_have_ksh=yes
 444 fi
 445 AC_SUBST(libc_cv_have_ksh)
 446
 447 AC_PATH_PROGS(PERL, perl, no)
 448 AC_SUBST(PERL)
 449
 450 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
 451 echo '#include <stddef.h>
 452 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
 453 if eval "$ac_cpp conftest.c 2>/dev/null" \
 454 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
 455   libc_cv_signed_size_t=no
 456 else
 457   libc_cv_signed_size_t=yes
 458 fi
 459 rm -f conftest*])
 460 if test $libc_cv_signed_size_t = yes; then
 461   dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
 462   cat >> confdefs.h <<\EOF
 463 #undef __SIZE_TYPE__
 464 #define __SIZE_TYPE__ unsigned
 465 EOF
 466 fi
 467
 468 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
 469 AC_TRY_COMPILE(dnl
 470 [#define __need_size_t
 471 #define __need_wchar_t
 472 #include <stddef.h>
 473 #define __need_NULL
 474 #include <stddef.h>], [size_t size; wchar_t wchar;
 475 #ifdef offsetof
 476 #error stddef.h ignored __need_*
 477 #endif
 478 if (&size == NULL || &wchar == NULL) abort ();],
 479                libc_cv_friendly_stddef=yes,
 480                libc_cv_friendly_stddef=no)])
 481 if test $libc_cv_friendly_stddef = yes; then
 482   config_vars="$config_vars
 483 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
 484 fi
 485
 486 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
 487                libc_cv_need_minus_P, [dnl
 488 cat > conftest.S <<EOF
 489 #include "confdefs.h"
 490 /* Nothing whatsoever.  */
 491 EOF
 492 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
 493   libc_cv_need_minus_P=no
 494 else
 495   libc_cv_need_minus_P=yes
 496 fi
 497 rm -f conftest*])
 498 if test $libc_cv_need_minus_P = yes; then
 499   config_vars="$config_vars
 500 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
 501 fi
 502
 503 # gcc 2.7.x has a bug where if -pipe is set, the assembler will always
 504 # be told to read stdin.  This causes the compiler to hang when fed an
 505 # .s file.
 506 if test $ac_cv_prog_gcc = yes; then
 507  case `${CC-cc} -v 2>&1` in
 508   *2.7*)
 509   # We must check this even if -pipe is not given here, because the user
 510   # might do `make CFLAGS=-pipe'.
 511   AC_CACHE_CHECK(for gcc 2.7.x -pipe bug, libc_cv_gcc_pipe_bug, [dnl
 512    cat >conftest.s <<EOF
 513 foo:
 514 EOF
 515    if ${CC-cc} -pipe -c conftest.s <conftest.s 2>/dev/null; then
 516     libc_cv_gcc_pipe_bug=no
 517    else
 518     libc_cv_gcc_pipe_bug=yes
 519    fi
 520    rm -f conftest*])
 521   if test $libc_cv_gcc_pipe_bug = yes; then
 522    makeCC="${CC-cc} -B\$(common-objpfx)"
 523    makeCFLAGS=$CFLAGS
 524    CFLAGS=`echo $CFLAGS |sed 's/-pipe//'`
 525   fi;;
 526  *) libc_cv_gcc_pipe_bug=no;;
 527  esac
 528 else
 529  libc_cv_gcc_pipe_bug=no
 530 fi
 531
 532 AC_CACHE_CHECK(for assembler global-symbol directive,
 533                libc_cv_asm_global_directive, [dnl
 534 libc_cv_asm_global_directive=UNKNOWN
 535 for ac_globl in .globl .global; do
 536   cat > conftest.s <<EOF
 537 .text
 538 ${ac_globl} foo
 539 foo:
 540 EOF
 541   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 542     libc_cv_asm_global_directive=${ac_globl}
 543   fi
 544   rm -f conftest*
 545   test $libc_cv_asm_global_directive != UNKNOWN && break
 546 done])
 547 if test $libc_cv_asm_global_directive = UNKNOWN; then
 548   AC_MSG_ERROR(cannot determine asm global directive)
 549 else
 550   AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
 551 fi
 552
 553 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
 554 cat > conftest.s <<EOF
 555 .text
 556 foo:
 557 .set glibc_conftest_frobozz,foo
 558 $libc_cv_asm_global_directive glibc_conftest_frobozz
 559 EOF
 560 # The alpha-dec-osf1 assembler gives only a warning for `.set'
 561 # (but it doesn't work), so we must do a linking check to be sure.
 562 cat > conftest1.c <<\EOF
 563 extern int glibc_conftest_frobozz;
 564 main () { printf ("%d\n", glibc_conftest_frobozz); }
 565 EOF
 566 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
 567             -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
 568   libc_cv_asm_set_directive=yes
 569 else
 570   libc_cv_asm_set_directive=no
 571 fi
 572 rm -f conftest*])
 573 if test $libc_cv_asm_set_directive = yes; then
 574   AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
 575 fi
 576
 577 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
 578 [cat > conftest.s <<EOF
 579 .text
 580 _sym:
 581 .symver _sym,sym@VERS
 582 EOF
 583 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
 584   libc_cv_asm_symver_directive=yes
 585 else
 586   libc_cv_asm_symver_directive=no
 587 fi
 588 rm -f conftest*])
 589 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
 590 if test $libc_cv_asm_symver_directive = yes; then
 591   cat > conftest.s <<EOF
 592 .text
 593 _sym:
 594 .symver _sym,sym@VERS
 595 EOF
 596   cat > conftest.map <<EOF
 597 VERS {
 598         global: sym;
 599 };
 600 EOF
 601   if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
 602     if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
 603                                         -nostartfiles -nostdlib
 604                                         -Wl,--version-script,conftest.map
 605                        1>&AC_FD_CC]);
 606     then
 607       libc_cv_ld_version_script_option=yes
 608     else
 609       libc_cv_ld_version_script_option=no
 610     fi
 611   else
 612     libc_cv_ld_version_script_option=no
 613   fi
 614 else
 615   libc_cv_ld_version_script_option=no
 616 fi
 617 rm -f conftest*])
 618 if test $libc_cv_asm_symver_directive = yes &&
 619    test $libc_cv_ld_version_script_option = yes &&
 620    test $enable_versioning = yes; then
 621   VERSIONING=yes
 622   AC_DEFINE(DO_VERSIONING)
 623 else
 624   VERSIONING=no
 625 fi
 626 AC_SUBST(VERSIONING)
 627
 628 if test $elf = yes; then
 629   AC_CACHE_CHECK(for .previous assembler directive,
 630                  libc_cv_asm_previous_directive, [dnl
 631   cat > conftest.s <<EOF
 632 .section foo_section
 633 .previous
 634 EOF
 635   if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
 636     libc_cv_asm_previous_directive=yes
 637   else
 638     libc_cv_asm_previous_directive=no
 639   fi
 640   rm -f conftest*])
 641   if test $libc_cv_asm_previous_directive = yes; then
 642     AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
 643   else
 644     AC_CACHE_CHECK(for .popsection assembler directive,
 645                    libc_cv_asm_popsection_directive, [dnl
 646     cat > conftest.s <<EOF
 647 .pushsection foo_section
 648 .popsection
 649 EOF
 650     if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
 651       libc_cv_asm_popsection_directive=yes
 652     else
 653       libc_cv_asm_popsection_directive=no
 654     fi
 655     rm -f conftest*])
 656     if test $libc_cv_asm_popsection_directive = yes; then
 657       AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
 658     fi
 659   fi
 660 fi
 661
 662 if test $elf != yes; then
 663   AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
 664                  [AC_TRY_COMPILE(, [asm (".section .init");
 665                                     asm (".section .fini");
 666                                     asm (".text");],
 667                                  libc_cv_have_initfini=yes,
 668                                  libc_cv_have_initfini=no)])
 669   AC_SUBST(libc_cv_have_initfini)dnl
 670   if test $libc_cv_have_initfini = yes; then
 671     AC_DEFINE(HAVE_INITFINI)
 672   fi
 673 fi
 674
 675 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
 676 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
 677 [cat > conftest.$ac_ext <<EOF
 678 dnl This sometimes fails to find confdefs.h, for some reason.
 679 dnl [#]line __oline__ "[$]0"
 680 [#]line __oline__ "configure"
 681 #include "confdefs.h"
 682 void underscore_test(void) {
 683 return; }
 684 EOF
 685 if AC_TRY_EVAL(ac_compile); then
 686   if grep _underscore_test conftest* >/dev/null; then
 687     ifelse([$1], , :, [rm -f conftest*
 688     $1])
 689   else
 690     ifelse([$2], , , [rm -f conftest*
 691     $2])
 692   fi
 693 else
 694   echo "configure: failed program was:" >&AC_FD_CC
 695   cat conftest.$ac_ext >&AC_FD_CC
 696   ifelse([$2], , , [rm -f conftest*
 697   $2])
 698 fi
 699 rm -f conftest*])
 700
 701 if test $elf = yes; then
 702   libc_cv_asm_underscores=no
 703 else
 704   if test $ac_cv_prog_cc_works = yes; then
 705     AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
 706                    [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
 707                                 libc_cv_asm_underscores=yes,
 708                                 libc_cv_asm_underscores=no)])
 709   else
 710     AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
 711                    [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
 712                                             libc_cv_asm_underscores=no)])
 713   fi
 714 fi
 715 if test $libc_cv_asm_underscores = no; then
 716   AC_DEFINE(NO_UNDERSCORES)
 717 fi
 718
 719 if test $elf = yes; then
 720   libc_cv_weak_symbols=yes
 721   libc_cv_asm_weak_directive=yes
 722   libc_cv_asm_weakext_directive=no
 723 else
 724   AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
 725                  [dnl
 726 cat > conftest.s <<EOF
 727 .text
 728 ${libc_cv_asm_global_directive} foo
 729 foo:
 730 .weak foo
 731 .weak bar; bar = foo
 732 EOF
 733   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 734     libc_cv_asm_weak_directive=yes
 735   else
 736     libc_cv_asm_weak_directive=no
 737   fi
 738   rm -f conftest*])
 739
 740 if test $libc_cv_asm_weak_directive = no; then
 741   AC_CACHE_CHECK(for assembler .weakext directive,
 742                  libc_cv_asm_weakext_directive,
 743                  [dnl
 744 cat > conftest.s <<EOF
 745 .text
 746 ${libc_cv_asm_global_directive} foo
 747 foo:
 748 .weakext foo
 749 .weakext foo, bar
 750 EOF
 751   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 752     libc_cv_asm_weakext_directive=yes
 753   else
 754     libc_cv_asm_weakext_directive=no
 755   fi
 756   rm -f conftest*])
 757
 758   fi # no .weak
 759 fi # not ELF
 760
 761 if test $libc_cv_asm_weak_directive = yes; then
 762   AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
 763 elif test $libc_cv_asm_weakext_directive = yes; then
 764   AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
 765 fi
 766
 767 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
 768 cat > conftest.c <<\EOF
 769 _start () {}
 770 int __eh_pc;
 771 __throw () {}
 772 EOF
 773 dnl No \ in command here because it ends up inside ''.
 774 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
 775                             -nostdlib -nostartfiles -Wl,--no-whole-archive
 776                             -o conftest conftest.c 1>&AC_FD_CC]); then
 777   libc_cv_ld_no_whole_archive=yes
 778 else
 779   libc_cv_ld_no_whole_archive=no
 780 fi
 781 rm -f conftest*])
 782 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
 783
 784 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
 785 cat > conftest.c <<\EOF
 786 _start () {}
 787 int __eh_pc;
 788 __throw () {}
 789 EOF
 790 dnl No \ in command here because it ends up inside ''.
 791 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
 792                             -nostdlib -nostartfiles -fno-exceptions
 793                             -o conftest conftest.c 1>&AC_FD_CC]); then
 794   libc_cv_gcc_no_exceptions=yes
 795 else
 796   libc_cv_gcc_no_exceptions=no
 797 fi
 798 rm -f conftest*])
 799 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
 800
 801 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
 802 [cat > conftest.c <<EOF
 803 #line __oline__ "configure"
 804 static char __EH_FRAME_BEGIN__[];
 805 _start ()
 806 {
 807   __register_frame (__EH_FRAME_BEGIN__);
 808   __deregister_frame (__EH_FRAME_BEGIN__);
 809 }
 810 int __eh_pc;
 811 __throw () {}
 812 /* FIXME: this is fragile.  */
 813 malloc () {}
 814 strcmp () {}
 815 strlen () {}
 816 memcpy () {}
 817 memset () {}
 818 free () {}
 819 abort () {}
 820 __bzero () {}
 821 EOF
 822 dnl No \ in command here because it ends up inside ''.
 823 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
 824                             -nostdlib -nostartfiles
 825                             -o conftest conftest.c -lgcc >&AC_FD_CC]); then
 826   libc_cv_gcc_dwarf2_unwind_info=yes
 827 else
 828   libc_cv_gcc_dwarf2_unwind_info=no
 829 fi
 830 rm -f conftest*])
 831 if test $libc_cv_gcc_dwarf2_unwind_info = yes; then
 832   AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
 833 fi
 834
 835 ### End of automated tests.
 836 ### Now run sysdeps configure fragments.
 837
 838 # sysdeps configure fragments may set these with files to be linked below.
 839 libc_link_dests=
 840 libc_link_sources=
 841
 842 # Iterate over all the sysdep directories we will use, running their
 843 # configure fragments, and looking for a uname implementation.
 844 uname=
 845 for dir in $sysnames; do
 846   case $dir in
 847     /*) dest=$dir ;;
 848     *)  dest=$srcdir/$dir ;;
 849   esac
 850   if test -r $dest/configure; then
 851     AC_MSG_RESULT(running configure fragment for $dest)
 852     . $dest/configure
 853   fi
 854 [
 855   if test -z "$uname"; then
 856     if test -r $dest/uname.c ||
 857        test -r $dest/uname.S ||
 858        { test -r $dest/syscalls.list &&
 859          grep '^uname[  ]' $dest/syscalls.list >/dev/null; }; then
 860       uname=$dir
 861     fi
 862   fi
 863 ]dnl
 864 done
 865
 866 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
 867
 868 # If we will use the generic uname implementation, we must figure out what
 869 # it will say by examining the system, and write the results in config-name.h.
 870 if test "$uname" = "sysdeps/generic"; then
 871
 872 changequote(,)dnl
 873   uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
 874 changequote([,])dnl
 875   if test $uname_sysname != $config_os; then
 876     config_release=`echo $config_os | sed s/$uname_sysname//`
 877   fi
 878 dnl
 879 AC_DEFUN(LIBC_KERNEL_ID, [dnl
 880     if test -r /vmunix; then
 881       kernel_id=`strings /vmunix | grep UNIX`
 882     elif test -r /dynix; then
 883       kernel_id=`strings /dynix | grep DYNIX`
 884     else
 885       kernel_id=
 886     fi
 887 ])dnl
 888
 889   AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
 890 AC_REQUIRE([LIBC_KERNEL_ID])dnl
 891 changequote(,)dnl
 892   kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
 893 changequote([,])dnl
 894   if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
 895          != x$config_release; then
 896     # The configuration release is a substring of the kernel release.
 897     libc_cv_uname_release=$kernel_release
 898   elif test x$config_release != x; then
 899     libc_cv_uname_release=$config_release
 900   elif test x$kernel_release != x; then
 901     libc_cv_uname_release=$kernel_release
 902   else
 903     libc_cv_uname_release=unknown
 904   fi])
 905   uname_release="$libc_cv_uname_release"
 906
 907   AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
 908 AC_REQUIRE([LIBC_KERNEL_ID])dnl
 909 changequote(,)dnl
 910   kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
 911 changequote([,])dnl
 912   if test -n "$kernel_version"; then
 913     libc_cv_uname_version="$kernel_version"
 914   else
 915     libc_cv_uname_version=unknown
 916   fi])
 917   uname_version="$libc_cv_uname_version"
 918
 919 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
 920   config_uname=config-name.h:config-name.in
 921 else
 922   # For non-generic uname, we don't need to create config-name.h at all.
 923   config_uname=
 924 fi
 925
 926 AC_MSG_CHECKING(stdio selection)
 927 AC_SUBST(stdio)
 928 case $stdio in
 929 libio) AC_DEFINE(USE_IN_LIBIO) ;;
 930 default) stdio=stdio ;;
 931 esac
 932 AC_MSG_RESULT($stdio)
 933
 934 AC_MSG_CHECKING(ldap selection)
 935 AC_SUBST(LDAP)
 936 case $add_ons in
 937 *ldap*)
 938    ldap=yes
 939    LDAP=ldap ;;
 940 *) ldap=no
 941    LDAP= ;;
 942 esac
 943 AC_MSG_RESULT($ldap)
 944
 945 AC_SUBST(libc_cv_slibdir)
 946 AC_SUBST(libc_cv_sysconfdir)
 947 AC_SUBST(libc_cv_rootsbindir)
 948
 949 AC_SUBST(has_ldconfig)
 950
 951 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
 952 if test $gnu_ld = yes; then
 953   AC_DEFINE(HAVE_GNU_LD)
 954 fi
 955 if test $gnu_as = yes; then
 956   AC_DEFINE(HAVE_GNU_AS)
 957 fi
 958 if test $elf = yes; then
 959   AC_DEFINE(HAVE_ELF)
 960 fi
 961
 962 AC_SUBST(static)
 963 AC_SUBST(shared)
 964 if test $shared = default; then
 965   if test $gnu_ld = yes; then
 966     shared=$elf
 967   else
 968     # For now we do not assume shared libs are available.  In future more
 969     # tests might become available.
 970     shared=no
 971   fi
 972 fi
 973 AC_SUBST(profile)
 974 AC_SUBST(omitfp)
 975 AC_SUBST(bounded)
 976 AC_SUBST(static_nss)
 977 AC_SUBST(nopic_initfini)
 978
 979 AC_SUBST(DEFINES)
 980
 981 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
 982   config_makefile=
 983 else
 984   config_makefile=Makefile
 985 fi
 986
 987 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
 988 AC_SUBST(VERSION)
 989
 990 if test $libc_cv_gcc_pipe_bug = yes; then
 991  realCC=$CC
 992  CC=$makeCC
 993  CFLAGS=$makeCFLAGS
 994 fi
 995 AC_OUTPUT_COMMANDS([
 996 if test "$realCC"; then
 997  sed -e 's/%{pipe:-}/%|/g' `$realCC -print-file-name=specs` >specsT
 998  mv specsT specs
 999 fi], [realCC=$realCC])
1000
1001 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1002           [echo '$config_vars' >> config.make; test -d bits || mkdir bits])