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 AC_ARG_WITH(cvs, dnl
  46 [  --without-cvs          if CVS should not be used],
  47             with_cvs=$withval, with_cvs=yes)
  48 AC_SUBST(with_cvs)
  49
  50 AC_ARG_WITH(headers, dnl
  51 [  --with-headers=PATH     location of system headers to use
  52                           [e.g. /usr/src/linux/include]
  53                           [default=compiler default]],
  54             sysheaders=$withval, sysheaders='')
  55
  56 AC_ARG_ENABLE(libio, dnl
  57 [  --enable-libio          build in GNU libio instead of GNU stdio],
  58               [if test $enableval = yes; then
  59                  stdio=libio
  60                else
  61                  stdio=stdio
  62                fi],
  63               stdio=default)
  64
  65 AC_ARG_ENABLE(sanity-checks, dnl
  66 [  --disable-sanity-checks really do not use threads (should not be used
  67                           except in special situations) [default=yes]],
  68               enable_sanity=$enableval, enable_sanity=yes)
  69
  70 dnl Arguments to enable or disable building the static, shared, profiled,
  71 dnl and -fomit-frame-pointer libraries.
  72 AC_ARG_ENABLE(static, dnl
  73 [  --enable-static         build static library [default=yes]],
  74               static=$enableval, static=yes)
  75 AC_ARG_ENABLE(shared, dnl
  76 [  --enable-shared         build shared library [default=yes if GNU ld & ELF]],
  77               shared=$enableval, shared=default)
  78 AC_ARG_ENABLE(profile, dnl
  79 [  --enable-profile        build profiled library [default=yes]],
  80               profile=$enableval, profile=yes)
  81 AC_ARG_ENABLE(omitfp, dnl
  82 [  --enable-omitfp         build undebuggable optimized library [default=no]],
  83               omitfp=$enableval, omitfp=no)
  84 AC_ARG_ENABLE(bounded, dnl
  85 [  --enable-bounded        build with runtime bounds checking [default=no]],
  86               bounded=$enableval, bounded=no)
  87 AC_ARG_ENABLE(versioning, dnl
  88 [  --disable-versioning    do not include versioning information in the
  89                           library objects [default=yes if supported]],
  90              enable_versioning=$enableval, enable_versioning=yes)
  91
  92 dnl Generic infrastructure for drop-in additions to libc.
  93 AC_ARG_ENABLE(add-ons, dnl
  94 [  --enable-add-ons[=DIR1,DIR2]...
  95                           configure and build add-ons in DIR1,DIR2,...
  96                           search for add-ons if no parameter given],
  97   [case "$enableval" in
  98     yes) if test "$srcdir" = "."; then
  99            add_ons=`echo */configure | sed -e 's!/configure!!g'`
 100          else
 101            add_ons=`echo $srcdir/*/configure | \
 102                     sed -e 's!/configure!!g' -e "s!$srcdir/!!g"`
 103          fi;;
 104     *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
 105    esac],
 106   [add_ons=])
 107
 108 AC_CONFIG_SUBDIRS($add_ons)
 109 add_ons_pfx=
 110 if test x"$add_ons" != x; then
 111   for f in $add_ons; do
 112     # Test whether such a subdir really exists.
 113     if test -d $srcdir/$f; then
 114       add_ons_pfx="$add_ons_pfx $f/"
 115     else
 116       AC_MSG_ERROR(add-on directory \"$f\" does not exist)
 117     fi
 118   done
 119 fi
 120
 121 dnl On some platforms we cannot use dynamic loading.  We must provide
 122 dnl static NSS modules.
 123 AC_ARG_ENABLE(static-nss, dnl
 124 [  --enable-static-nss     build static NSS modules [default=no]],
 125               static_nss=$enableval, static_nss=no)
 126 if test x"$static_nss" = xyes; then
 127   AC_DEFINE(DO_STATIC_NSS)
 128 fi
 129
 130 AC_ARG_ENABLE(force-install,
 131 [  --enable-force-install  force installation of files from this package,
 132                           even if they are older than the installed files],
 133               force_install=$enableval, force_install=yes)
 134 AC_SUBST(force_install)
 135
 136 AC_CANONICAL_HOST
 137
 138 # The way shlib-versions is used to generate soversions.mk uses a
 139 # fairly simplistic model for name recognition that can't distinguish
 140 # i486-pc-linux-gnu fully from i486-pc-gnu.  So we mutate a $host_os
 141 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
 142 # tell.  This doesn't get used much beyond that, so it's fairly safe.
 143 case "$host_os" in
 144 linux*)
 145   ;;
 146 gnu*)
 147   host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
 148   ;;
 149 esac
 150
 151 ###
 152 ### I put this here to prevent those annoying emails from people who cannot
 153 ### read and try to compile glibc on unsupported platforms.  --drepper
 154 ###
 155 ### By using the undocumented --enable-hacker-mode option for configure
 156 ### one can skip this test to make the configuration not fail for unsupported
 157 ### platforms.
 158 ###
 159 if test -z "$enable_hacker_mode"; then
 160   case "$machine-$host_os" in
 161   *-linux* | *-gnu* | arm*-none*)
 162     ;;
 163   *)
 164     echo "*** The GNU C library is currently not available for this platform."
 165     echo "*** So far nobody cared to port it and if there is no volunteer it"
 166     echo "*** might never happen.  So, if you have interest to see glibc on"
 167     echo "*** this platform visit"
 168     echo "***   http://www.gnu.org/software/libc/porting.html"
 169     echo "*** and join the group of porters"
 170     exit 1
 171     ;;
 172   esac
 173 fi
 174
 175 # We keep the original values in `$config_*' and never modify them, so we
 176 # can write them unchanged into config.make.  Everything else uses
 177 # $machine, $vendor, and $os, and changes them whenever convenient.
 178 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
 179
 180 # Some configurations imply other options.
 181 case "$host_os" in
 182 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
 183   # These systems always use GNU tools.
 184   gnu_ld=yes gnu_as=yes ;;
 185 esac
 186 case "$host_os" in
 187 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
 188 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
 189   ;;
 190 gnu* | linux* | sysv4* | solaris2* | irix6*)
 191   # These systems (almost) always use the ELF format.
 192   elf=yes
 193   ;;
 194 esac
 195
 196 machine=$config_machine
 197 vendor=$config_vendor
 198 os=$config_os
 199
 200 dnl We need to use [ and ] for other purposes for a while now.
 201 changequote(,)dnl
 202 # Expand the configuration machine name into a subdirectory by architecture
 203 # type and particular chip.
 204 case "$machine" in
 205 a29k | am29000) base_machine=a29k machine=a29k ;;
 206 alpha*)         base_machine=alpha machine=alpha/$machine ;;
 207 arm*)           base_machine=arm machine=arm/$machine ;;
 208 c3[012])        base_machine=cx0 machine=cx0/c30 ;;
 209 c4[04])         base_machine=cx0 machine=cx0/c40 ;;
 210 hppa*)          base_machine=hppa machine=hppa/$machine ;;
 211 i[3456]86)      base_machine=i386 machine=i386/$machine ;;
 212 m680?0)         base_machine=m68k machine=m68k/$machine ;;
 213 m68k)           base_machine=m68k machine=m68k/m68020 ;;
 214 m88???)         base_machine=m88k machine=m88k/$machine ;;
 215 m88k)           base_machine=m88k machine=m88k/m88100 ;;
 216 mips64*)        base_machine=mips64 machine=mips/mips64/$machine ;;
 217 mips*)          base_machine=mips
 218                 case "`uname -m`" in
 219                 IP22) machine=mips/mips3 ;;
 220                 *)    machine=mips/$machine ,,
 221                 esac ;;
 222 sparc | sparcv[67])
 223                 base_machine=sparc machine=sparc/sparc32 ;;
 224 sparcv8 | supersparc | hypersparc)
 225                 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
 226 sparc64 | ultrasparc)
 227                 base_machine=sparc machine=sparc/sparc64 ;;
 228 esac
 229 changequote([,])dnl
 230 AC_SUBST(base_machine)
 231
 232 if test "$base_machine" = "i386"; then
 233   AC_DEFINE(USE_REGPARMS)
 234 fi
 235
 236 # Compute the list of sysdep directories for this configuration.
 237 # This can take a while to compute.
 238 sysdep_dir=$srcdir/sysdeps
 239 AC_MSG_CHECKING(sysdep dirs)
 240 dnl We need to use [ and ] for other purposes for a while now.
 241 changequote(,)dnl
 242 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
 243 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
 244
 245 case "$os" in
 246 gnu*)
 247   base_os=mach/hurd ;;
 248 netbsd* | 386bsd* | freebsd* | bsdi*)
 249   base_os=unix/bsd/bsd4.4 ;;
 250 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
 251   base_os=unix/bsd ;;
 252 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
 253   base_os=unix/sysv ;;
 254 irix6*)
 255   base_os=unix/sysv/irix6/$os ;;
 256 solaris[2-9]*)
 257   base_os=unix/sysv/sysv4 ;;
 258 none)
 259   base_os=standalone ;;
 260 *)
 261   base_os='' ;;
 262 esac
 263
 264 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
 265 tail=$os
 266 ostry=$os
 267 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
 268   ostry="$ostry /$o"
 269   tail=$o
 270 done
 271 o=`echo $tail | sed 's/[0-9]*$//'`
 272 if test $o != $tail; then
 273   ostry="$ostry /$o"
 274 fi
 275 # For linux-gnu, try linux-gnu, then linux.
 276 o=`echo $tail | sed 's/-.*$//'`
 277 if test $o != $tail; then
 278   ostry="$ostry /$o"
 279 fi
 280
 281 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
 282 base=
 283 tail=$base_os
 284 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
 285   set $b
 286   base="$base /$1"
 287   tail="$2"
 288 done
 289
 290 # For sparc/sparc9, try sparc/sparc9 and then sparc.
 291 mach=
 292 tail=$machine
 293 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
 294   set $m
 295   # Prepend the machine's FPU directory unless --without-fp.
 296   if test "$with_fp" = yes; then
 297     mach="$mach /$1/fpu"
 298   fi
 299   mach="$mach /$1"
 300   tail="$2"
 301 done
 302
 303 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
 304 changequote([,])dnl
 305
 306 # Find what sysdep directories exist.
 307 sysnames=
 308 IFS="${IFS=     }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
 309 for d in $add_ons_pfx ''; do
 310   for b in $base ''; do
 311     for m0 in $mach ''; do
 312       for v in /$vendor ''; do
 313         test "$v" = / && continue
 314         for o in /$ostry ''; do
 315           test "$o" = / && continue
 316           for m in $mach ''; do
 317             if test "$m0$b$v$o$m"; then
 318               try="${d}sysdeps$m0$b$v$o$m"
 319               test -n "$enable_debug_configure" &&
 320               echo "$0 [DEBUG]: try $try" >&2
 321               case $try in
 322                 /*) dest=$try ;;
 323                 *)  dest=$srcdir/$try ;;
 324               esac
 325               if test -d $dest; then
 326                 sysnames="$sysnames $try"
 327                 { test -n "$o" || test -n "$b"; } && os_used=t
 328                 { test -n "$m" || test -n "$m0"; } && machine_used=t
 329               fi
 330             fi
 331           done
 332         done
 333       done
 334     done
 335   done
 336 done
 337 IFS="$ac_save_ifs"
 338
 339 if test -z "$os_used" && test "$os" != none; then
 340   AC_MSG_ERROR(Operating system $os is not supported.)
 341 fi
 342 if test -z "$machine_used" && test "$machine" != none; then
 343   AC_MSG_ERROR(The $machine is not supported.)
 344 fi
 345
 346 # We have now validated the configuration.
 347
 348
 349 # If using ELF, look for an `elf' subdirectory of each machine directory.
 350 # We prepend these rather than inserting them whereever the machine appears
 351 # because things specified by the machine's ELF ABI should override
 352 # OS-specific things, and should always be the same for any OS on the
 353 # machine (otherwise what's the point of an ABI?).
 354 if test "$elf" = yes; then
 355   elf_dirs=
 356   for d in $add_ons_pfx ''; do
 357     case $d in
 358       /*) xsrcdir= ;;
 359       *)  xsrcdir=$srcdir/ ;;
 360     esac
 361     for m in $mach; do
 362       if test -d $xsrcdir${d}sysdeps$m/elf; then
 363         elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
 364       fi
 365     done
 366   done
 367   sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
 368 fi
 369
 370
 371 # Expand the list of system names into a full list of directories
 372 # from each element's parent name and Implies file (if present).
 373 set $sysnames
 374 names=
 375 while test $# -gt 0; do
 376   name=$1
 377   shift
 378
 379   case " $names " in *" $name "*)
 380     # Already in the list.
 381     continue
 382   esac
 383
 384   # Report each name as we discover it, so there is no long pause in output.
 385   echo $ac_n "$name $ac_c" >&AC_FD_MSG
 386
 387   name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
 388
 389   case $name in
 390     /*) xsrcdir= ;;
 391     *)  xsrcdir=$srcdir/ ;;
 392   esac
 393   test -n "$enable_debug_configure" &&
 394   echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
 395
 396   if test -f $xsrcdir$name/Implies; then
 397     # Collect more names from the `Implies' file (removing comments).
 398     implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
 399     implied=
 400     for x in $implied_candidate; do
 401       if test -d $xsrcdir$name_base/$x; then
 402         implied="$implied $name_base/$x";
 403       else
 404         AC_MSG_WARN($name/Implies specifies nonexistent $x)
 405       fi
 406     done
 407   else
 408     implied=
 409   fi
 410
 411   # Add NAME to the list of names.
 412   names="$names $name"
 413
 414   # Find the parent of NAME, using the empty string if it has none.
 415 changequote(,)dnl
 416   parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
 417 changequote([,])dnl
 418
 419   # Add the names implied by NAME, and NAME's parent (if it has one), to
 420   # the list of names to be processed (the argument list).  We prepend the
 421   # implied names to the list and append the parent.  We want implied
 422   # directories to come before further directories inferred from the
 423   # configuration components; this ensures that for sysv4, unix/common
 424   # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
 425   # after sysv4).
 426   sysnames="`echo $implied $* $parent`"
 427   test -n "$sysnames" && set $sysnames
 428 done
 429
 430 # Add the default directories.
 431 sysnames="$names sysdeps/generic"
 432 AC_SUBST(sysnames)
 433 # The other names were emitted during the scan.
 434 AC_MSG_RESULT(sysdeps/generic)
 435
 436
 437 ### Locate tools.
 438
 439 AC_PROG_INSTALL
 440 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
 441   # The makefiles need to use a different form to find it in $srcdir.
 442   INSTALL='\$(..)./install-sh -c'
 443 fi
 444 AC_PROG_LN_S
 445
 446 # These programs are version sensitive.
 447 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
 448 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
 449   [version \([egcst0-9.-]*\)],
 450   [egcs-2.91.*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9.[0-9]*],
 451   critic_missing=t)
 452 AC_CHECK_PROG_VER(MAKE, make gmake, --version,
 453   [version \([0-9][0-9.]*\), by],
 454   [3.75 | 3.76.[1-9] | 3.7[789]* | 3.[89]*], critic_missing=t)
 455
 456 AC_CHECK_PROG_VER(MSGFMT, msgfmt gmsgfmt, --version,
 457   [GNU gettext.*\([0-9][0-9]*\.[0-9]*\)],
 458   [0.[1-9][0-9] | [1-9].*], MSGFMT=: aux_missing=t)
 459 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 460   [GNU texinfo \([0-9][0-9.]*\)],
 461   [3.1[1-9] | 3.[2-9][0-9]], MAKEINFO=: aux_missing=t)
 462
 463 if test -n "$critic_missing"; then
 464 AC_MSG_ERROR([
 465 *** Some critical program is missing or too old.
 466 *** Check the INSTALL file for required versions.])
 467 fi
 468
 469 test -n "$aux_missing" && AC_MSG_WARN([
 470 *** An auxiliary program is missing or too old;
 471 *** some features will be disabled.
 472 *** Check the INSTALL file for required versions.])
 473
 474 AC_PROG_CC_LOCAL
 475 AC_CANONICAL_BUILD
 476 if test $host != $build; then
 477   AC_CHECK_PROGS(BUILD_CC, gcc cc)
 478 fi
 479 AC_SUBST(cross_compiling)
 480 AC_PROG_CPP
 481 LIBC_PROG_BINUTILS
 482 AC_CHECK_TOOL(AR, ar)
 483 AC_CHECK_TOOL(RANLIB, ranlib, :)
 484 AC_CHECK_TOOL(MIG, mig)
 485
 486 # if using special system headers, find out the compiler's sekrit
 487 # header directory and add that to the list.  NOTE: Only does the right
 488 # thing on a system that doesn't need fixincludes.  (Not presently a problem.)
 489 if test -n "$sysheaders"; then
 490   ccheaders=`$CC -print-file-name=include`
 491   SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
 492 fi
 493 AC_SUBST(SYSINCLUDES)
 494
 495 # check if ar takes S
 496 AC_CACHE_CHECK(for ar S, libc_cv_ar_S, [dnl
 497 tmpo=$$.o
 498 tmplib=lib$$.a
 499 rm -f $tmpo $tmplib
 500 touch $tmpo
 501 if AC_TRY_COMMAND([${AR-ar} rcuS $tmplib $tmpo > /dev/null 2>&1]); then
 502   libc_cv_ar_S=yes
 503 else
 504   libc_cv_ar_S=no
 505 fi
 506 rm -f $tmpo $tmplib])
 507 AC_SUBST(libc_cv_ar_S)dnl
 508
 509 # Test if LD_LIBRARY_PATH contains the notation for the current directory
 510 # since this would lead to problems installing/building glibc.
 511 # LD_LIBRARY_PATH contains the current directory if one of the following
 512 # is true:
 513 # - one of the terminals (":" and ";") is the first or last sign
 514 # - two terminals occur directly after each other
 515 # - the path contains an element with a dot in it
 516 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
 517 changequote(,)dnl
 518 case ${LD_LIBRARY_PATH} in
 519   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
 520     ld_library_path_setting="contains current directory"
 521     ;;
 522   *)
 523     ld_library_path_setting="ok"
 524     ;;
 525 esac
 526 changequote([,])dnl
 527 AC_MSG_RESULT($ld_library_path_setting)
 528 if test "$ld_library_path_setting" != "ok"; then
 529 AC_MSG_ERROR([
 530 *** LD_LIBRARY_PATH shouldn't contain the current directory when
 531 *** building glibc. Please change the environment variable
 532 *** and run configure again.])
 533 fi
 534
 535 AC_PATH_PROG(BASH, bash, no)
 536 if test "$BASH" != no &&
 537    $BASH -c 'test "$BASH_VERSINFO" \
 538              && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
 539   libc_cv_have_bash2=yes
 540 else
 541   libc_cv_have_bash2=no
 542 fi
 543 AC_SUBST(libc_cv_have_bash2)
 544
 545 dnl We need a ksh compatible shell for tzselect.
 546 if test "$BASH" = no; then
 547   AC_PATH_PROG(KSH, ksh, no)
 548   if test "$KSH" = no; then
 549     libc_cv_have_ksh=no
 550   else
 551     libc_cv_have_ksh=yes
 552   fi
 553 else
 554   KSH="$BASH"
 555   AC_SUBST(KSH)
 556   libc_cv_have_ksh=yes
 557 fi
 558 AC_SUBST(libc_cv_have_ksh)
 559
 560 AC_PATH_PROGS(PERL, perl, no)
 561 AC_SUBST(PERL)
 562
 563 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
 564 echo '#include <stddef.h>
 565 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
 566 if eval "$ac_cpp conftest.c 2>/dev/null" \
 567 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
 568   libc_cv_signed_size_t=no
 569 else
 570   libc_cv_signed_size_t=yes
 571 fi
 572 rm -f conftest*])
 573 if test $libc_cv_signed_size_t = yes; then
 574   dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
 575   cat >> confdefs.h <<\EOF
 576 #undef __SIZE_TYPE__
 577 #define __SIZE_TYPE__ unsigned
 578 EOF
 579 fi
 580
 581 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
 582 AC_TRY_COMPILE(dnl
 583 [#define __need_size_t
 584 #define __need_wchar_t
 585 #include <stddef.h>
 586 #define __need_NULL
 587 #include <stddef.h>], [size_t size; wchar_t wchar;
 588 #ifdef offsetof
 589 #error stddef.h ignored __need_*
 590 #endif
 591 if (&size == NULL || &wchar == NULL) abort ();],
 592                libc_cv_friendly_stddef=yes,
 593                libc_cv_friendly_stddef=no)])
 594 if test $libc_cv_friendly_stddef = yes; then
 595   config_vars="$config_vars
 596 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
 597 fi
 598
 599 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
 600                libc_cv_need_minus_P, [dnl
 601 cat > conftest.S <<EOF
 602 #include "confdefs.h"
 603 /* Nothing whatsoever.  */
 604 EOF
 605 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
 606   libc_cv_need_minus_P=no
 607 else
 608   libc_cv_need_minus_P=yes
 609 fi
 610 rm -f conftest*])
 611 if test $libc_cv_need_minus_P = yes; then
 612   config_vars="$config_vars
 613 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
 614 fi
 615
 616 AC_CACHE_CHECK(for assembler global-symbol directive,
 617                libc_cv_asm_global_directive, [dnl
 618 libc_cv_asm_global_directive=UNKNOWN
 619 for ac_globl in .globl .global; do
 620   cat > conftest.s <<EOF
 621 .text
 622 ${ac_globl} foo
 623 foo:
 624 EOF
 625   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 626     libc_cv_asm_global_directive=${ac_globl}
 627   fi
 628   rm -f conftest*
 629   test $libc_cv_asm_global_directive != UNKNOWN && break
 630 done])
 631 if test $libc_cv_asm_global_directive = UNKNOWN; then
 632   AC_MSG_ERROR(cannot determine asm global directive)
 633 else
 634   AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
 635 fi
 636
 637 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
 638 cat > conftest.s <<EOF
 639 .text
 640 foo:
 641 .set glibc_conftest_frobozz,foo
 642 $libc_cv_asm_global_directive glibc_conftest_frobozz
 643 EOF
 644 # The alpha-dec-osf1 assembler gives only a warning for `.set'
 645 # (but it doesn't work), so we must do a linking check to be sure.
 646 cat > conftest1.c <<\EOF
 647 extern int glibc_conftest_frobozz;
 648 main () { printf ("%d\n", glibc_conftest_frobozz); }
 649 EOF
 650 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
 651             -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
 652   libc_cv_asm_set_directive=yes
 653 else
 654   libc_cv_asm_set_directive=no
 655 fi
 656 rm -f conftest*])
 657 if test $libc_cv_asm_set_directive = yes; then
 658   AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
 659 fi
 660
 661 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
 662 [cat > conftest.s <<EOF
 663 .text
 664 _sym:
 665 .symver _sym,sym@VERS
 666 EOF
 667 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
 668   libc_cv_asm_symver_directive=yes
 669 else
 670   libc_cv_asm_symver_directive=no
 671 fi
 672 rm -f conftest*])
 673 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
 674 if test $libc_cv_asm_symver_directive = yes; then
 675   cat > conftest.s <<EOF
 676 .text
 677 _sym:
 678 .symver _sym,sym@VERS
 679 EOF
 680   cat > conftest.map <<EOF
 681 VERS_1 {
 682         global: sym;
 683 };
 684
 685 VERS_2 {
 686         global: sym;
 687 } VERS_1;
 688 EOF
 689   if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
 690     if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
 691                                         -nostartfiles -nostdlib
 692                                         -Wl,--version-script,conftest.map
 693                        1>&AC_FD_CC]);
 694     then
 695       libc_cv_ld_version_script_option=yes
 696     else
 697       libc_cv_ld_version_script_option=no
 698     fi
 699   else
 700     libc_cv_ld_version_script_option=no
 701   fi
 702 else
 703   libc_cv_ld_version_script_option=no
 704 fi
 705 rm -f conftest*])
 706 if test $libc_cv_asm_symver_directive = yes &&
 707    test $libc_cv_ld_version_script_option = yes &&
 708    test $enable_versioning = yes; then
 709   VERSIONING=yes
 710   AC_DEFINE(DO_VERSIONING)
 711 else
 712   VERSIONING=no
 713 fi
 714 AC_SUBST(VERSIONING)
 715
 716 if test $VERSIONING = no; then
 717   echo "\
 718 *** WARNING: You should not compile GNU libc without versioning. Not using
 719 *** versioning will introduce incompatibilities so that old binaries
 720 *** will not run anymore.
 721 *** For versioning you need recent binutils (binutils-2.8.1.0.17 or newer)."
 722 fi
 723 if test $elf = yes; then
 724   AC_CACHE_CHECK(for .previous assembler directive,
 725                  libc_cv_asm_previous_directive, [dnl
 726   cat > conftest.s <<EOF
 727 .section foo_section
 728 .previous
 729 EOF
 730   if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
 731     libc_cv_asm_previous_directive=yes
 732   else
 733     libc_cv_asm_previous_directive=no
 734   fi
 735   rm -f conftest*])
 736   if test $libc_cv_asm_previous_directive = yes; then
 737     AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
 738   else
 739     AC_CACHE_CHECK(for .popsection assembler directive,
 740                    libc_cv_asm_popsection_directive, [dnl
 741     cat > conftest.s <<EOF
 742 .pushsection foo_section
 743 .popsection
 744 EOF
 745     if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
 746       libc_cv_asm_popsection_directive=yes
 747     else
 748       libc_cv_asm_popsection_directive=no
 749     fi
 750     rm -f conftest*])
 751     if test $libc_cv_asm_popsection_directive = yes; then
 752       AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
 753     fi
 754   fi
 755 fi
 756
 757 if test $elf != yes; then
 758   AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
 759                  [AC_TRY_COMPILE(, [asm (".section .init");
 760                                     asm (".section .fini");
 761                                     asm (".text");],
 762                                  libc_cv_have_initfini=yes,
 763                                  libc_cv_have_initfini=no)])
 764   AC_SUBST(libc_cv_have_initfini)dnl
 765   if test $libc_cv_have_initfini = yes; then
 766     AC_DEFINE(HAVE_INITFINI)
 767   fi
 768 fi
 769
 770 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
 771 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
 772 [cat > conftest.$ac_ext <<EOF
 773 dnl This sometimes fails to find confdefs.h, for some reason.
 774 dnl [#]line __oline__ "[$]0"
 775 [#]line __oline__ "configure"
 776 #include "confdefs.h"
 777 void underscore_test(void) {
 778 return; }
 779 EOF
 780 if AC_TRY_EVAL(ac_compile); then
 781   if grep _underscore_test conftest* >/dev/null; then
 782     ifelse([$1], , :, [rm -f conftest*
 783     $1])
 784   else
 785     ifelse([$2], , , [rm -f conftest*
 786     $2])
 787   fi
 788 else
 789   echo "configure: failed program was:" >&AC_FD_CC
 790   cat conftest.$ac_ext >&AC_FD_CC
 791   ifelse([$2], , , [rm -f conftest*
 792   $2])
 793 fi
 794 rm -f conftest*])
 795
 796 if test $elf = yes; then
 797   libc_cv_asm_underscores=no
 798 else
 799   if test $ac_cv_prog_cc_works = yes; then
 800     AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
 801                    [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
 802                                 libc_cv_asm_underscores=yes,
 803                                 libc_cv_asm_underscores=no)])
 804   else
 805     AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
 806                    [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
 807                                             libc_cv_asm_underscores=no)])
 808   fi
 809 fi
 810 if test $libc_cv_asm_underscores = no; then
 811   AC_DEFINE(NO_UNDERSCORES)
 812 fi
 813
 814 if test $elf = yes; then
 815   libc_cv_weak_symbols=yes
 816 fi
 817
 818 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
 819                  [dnl
 820 cat > conftest.s <<EOF
 821 .text
 822 ${libc_cv_asm_global_directive} foo
 823 foo:
 824 .weak foo
 825 .weak bar; bar = foo
 826 EOF
 827 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 828   libc_cv_asm_weak_directive=yes
 829 else
 830   libc_cv_asm_weak_directive=no
 831 fi
 832 rm -f conftest*])
 833
 834 if test $libc_cv_asm_weak_directive = no; then
 835   AC_CACHE_CHECK(for assembler .weakext directive,
 836                  libc_cv_asm_weakext_directive,
 837                  [dnl
 838 cat > conftest.s <<EOF
 839 .text
 840 ${libc_cv_asm_global_directive} foo
 841 foo:
 842 .weakext bar foo
 843 .weakext baz
 844 ${libc_cv_asm_global_directive} baz
 845 baz:
 846 EOF
 847   if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
 848     libc_cv_asm_weakext_directive=yes
 849   else
 850     libc_cv_asm_weakext_directive=no
 851   fi
 852   rm -f conftest*])
 853
 854 fi # no .weak
 855
 856 if test $libc_cv_asm_weak_directive = yes; then
 857   AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
 858 elif test $libc_cv_asm_weakext_directive = yes; then
 859   AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
 860 fi
 861
 862 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
 863 cat > conftest.c <<\EOF
 864 _start () {}
 865 int __eh_pc;
 866 __throw () {}
 867 EOF
 868 dnl No \ in command here because it ends up inside ''.
 869 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
 870                             -nostdlib -nostartfiles -Wl,--no-whole-archive
 871                             -o conftest conftest.c 1>&AC_FD_CC]); then
 872   libc_cv_ld_no_whole_archive=yes
 873 else
 874   libc_cv_ld_no_whole_archive=no
 875 fi
 876 rm -f conftest*])
 877 AC_SUBST(libc_cv_ld_no_whole_archive)dnl
 878
 879 AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl
 880 cat > conftest.c <<\EOF
 881 _start () {}
 882 int __eh_pc;
 883 __throw () {}
 884 EOF
 885 dnl No \ in command here because it ends up inside ''.
 886 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
 887                             -nostdlib -nostartfiles -fno-exceptions
 888                             -o conftest conftest.c 1>&AC_FD_CC]); then
 889   libc_cv_gcc_no_exceptions=yes
 890 else
 891   libc_cv_gcc_no_exceptions=no
 892 fi
 893 rm -f conftest*])
 894 AC_SUBST(libc_cv_gcc_no_exceptions)dnl
 895
 896 if test "$base_machine" = alpha ; then
 897 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
 898 cat > conftest.c <<\EOF
 899 foo () { }
 900 EOF
 901 dnl
 902 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
 903 then
 904   libc_cv_gcc_alpha_ng_prefix=yes
 905 else
 906   libc_cv_gcc_alpha_ng_prefix=no
 907 fi
 908 rm -f conftest* ])
 909 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
 910   AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
 911 else
 912   AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
 913 fi
 914 fi
 915
 916 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
 917 [cat > conftest.c <<EOF
 918 #line __oline__ "configure"
 919 static char __EH_FRAME_BEGIN__[];
 920 _start ()
 921 {
 922 #ifdef CHECK__register_frame
 923   __register_frame (__EH_FRAME_BEGIN__);
 924   __deregister_frame (__EH_FRAME_BEGIN__);
 925 #endif
 926 #ifdef CHECK__register_frame_info
 927   __register_frame_info (__EH_FRAME_BEGIN__);
 928   __deregister_frame_info (__EH_FRAME_BEGIN__);
 929 #endif
 930 }
 931 int __eh_pc;
 932 __throw () {}
 933 /* FIXME: this is fragile.  */
 934 malloc () {}
 935 strcmp () {}
 936 strlen () {}
 937 memcpy () {}
 938 memset () {}
 939 free () {}
 940 abort () {}
 941 __bzero () {}
 942 EOF
 943 dnl No \ in command here because it ends up inside ''.
 944 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
 945                             -nostdlib -nostartfiles
 946                             -o conftest conftest.c -lgcc >&AC_FD_CC]); then
 947   libc_cv_gcc_dwarf2_unwind_info=static
 948 else
 949   libc_cv_gcc_dwarf2_unwind_info=no
 950 fi
 951 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
 952   if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
 953                               -nostdlib -nostartfiles
 954                               -o conftest conftest.c -lgcc >&AC_FD_CC]); then
 955     libc_cv_gcc_dwarf2_unwind_info=yes
 956   else
 957     libc_cv_gcc_dwarf2_unwind_info=no
 958   fi
 959 fi
 960 rm -f conftest*])
 961 case $libc_cv_gcc_dwarf2_unwind_info in
 962 yes)
 963   AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
 964   ;;
 965 static)
 966   AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
 967   AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
 968   ;;
 969 esac
 970
 971 ### End of automated tests.
 972 ### Now run sysdeps configure fragments.
 973
 974 # sysdeps configure fragments may set these with files to be linked below.
 975 libc_link_dests=
 976 libc_link_sources=
 977
 978 # They also can set these variables.
 979 ldd_rewrite_script=no
 980
 981 # Iterate over all the sysdep directories we will use, running their
 982 # configure fragments, and looking for a uname implementation.
 983 uname=
 984 for dir in $sysnames; do
 985   case $dir in
 986     /*) dest=$dir ;;
 987     *)  dest=$srcdir/$dir ;;
 988   esac
 989   if test -r $dest/configure; then
 990     AC_MSG_RESULT(running configure fragment for $dest)
 991     . $dest/configure
 992   fi
 993 [
 994   if test -z "$uname"; then
 995     if test -r $dest/uname.c ||
 996        test -r $dest/uname.S ||
 997        { test -r $dest/syscalls.list &&
 998          grep '^uname[  ]' $dest/syscalls.list >/dev/null; }; then
 999       uname=$dir
1000     fi
1001   fi
1002 ]dnl
1003 done
1004
1005 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1006
1007 # If we will use the generic uname implementation, we must figure out what
1008 # it will say by examining the system, and write the results in config-name.h.
1009 if test "$uname" = "sysdeps/generic"; then
1010
1011 changequote(,)dnl
1012   uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1013 changequote([,])dnl
1014   if test $uname_sysname != $config_os; then
1015     config_release=`echo $config_os | sed s/$uname_sysname//`
1016   fi
1017 dnl
1018 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1019     if test -r /vmunix; then
1020       kernel_id=`strings /vmunix | grep UNIX`
1021     elif test -r /dynix; then
1022       kernel_id=`strings /dynix | grep DYNIX`
1023     else
1024       kernel_id=
1025     fi
1026 ])dnl
1027
1028   AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1029 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1030 changequote(,)dnl
1031   kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1032 changequote([,])dnl
1033   if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1034          != x$config_release; then
1035     # The configuration release is a substring of the kernel release.
1036     libc_cv_uname_release=$kernel_release
1037   elif test x$config_release != x; then
1038     libc_cv_uname_release=$config_release
1039   elif test x$kernel_release != x; then
1040     libc_cv_uname_release=$kernel_release
1041   else
1042     libc_cv_uname_release=unknown
1043   fi])
1044   uname_release="$libc_cv_uname_release"
1045
1046   AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1047 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1048 changequote(,)dnl
1049   kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1050 changequote([,])dnl
1051   if test -n "$kernel_version"; then
1052     libc_cv_uname_version="$kernel_version"
1053   else
1054     libc_cv_uname_version=unknown
1055   fi])
1056   uname_version="$libc_cv_uname_version"
1057
1058 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1059   config_uname=config-name.h:config-name.in
1060 else
1061   # For non-generic uname, we don't need to create config-name.h at all.
1062   config_uname=
1063 fi
1064
1065 AC_MSG_CHECKING(stdio selection)
1066 AC_SUBST(stdio)
1067 case $stdio in
1068 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1069 default) stdio=stdio ;;
1070 esac
1071 AC_MSG_RESULT($stdio)
1072
1073 AC_MSG_CHECKING(ldap selection)
1074 AC_SUBST(LDAP)
1075 case $add_ons in
1076 *ldap*)
1077    ldap=yes
1078    LDAP=ldap ;;
1079 *) ldap=no
1080    LDAP= ;;
1081 esac
1082 AC_MSG_RESULT($ldap)
1083
1084 AC_SUBST(libc_cv_slibdir)
1085 AC_SUBST(libc_cv_sysconfdir)
1086 AC_SUBST(libc_cv_rootsbindir)
1087
1088 AC_SUBST(has_ldconfig)
1089 AC_SUBST(ldd_rewrite_script)
1090
1091 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1092 if test $gnu_ld = yes; then
1093   AC_DEFINE(HAVE_GNU_LD)
1094 fi
1095 if test $gnu_as = yes; then
1096   AC_DEFINE(HAVE_GNU_AS)
1097 fi
1098 if test $elf = yes; then
1099   AC_DEFINE(HAVE_ELF)
1100 fi
1101
1102 AC_SUBST(static)
1103 AC_SUBST(shared)
1104 if test $shared = default; then
1105   if test $gnu_ld = yes; then
1106     shared=$elf
1107   else
1108     # For now we do not assume shared libs are available.  In future more
1109     # tests might become available.
1110     shared=no
1111   fi
1112 fi
1113
1114 dnl We must not allow compilation without static library on some platforms.
1115 if test $static = no && test $shared = yes; then
1116   case "$host_os" in
1117   linux* | gnu*)
1118     AC_MSG_ERROR([
1119 *** You must compile with support for the static library since the shared
1120 *** library uses it.  Restart configure without \`--disable-static'.])
1121     ;;
1122   *)
1123     ;;
1124   esac
1125 fi
1126
1127 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1128 [pic_default=yes
1129 cat > conftest.c <<EOF
1130 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1131 # error PIC is default.
1132 #endif
1133 EOF
1134 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1135   pic_default=no
1136 fi
1137 rm -f conftest.*])
1138 AC_SUBST(pic_default)
1139
1140 AC_SUBST(profile)
1141 AC_SUBST(omitfp)
1142 AC_SUBST(bounded)
1143 AC_SUBST(static_nss)
1144 AC_SUBST(nopic_initfini)
1145
1146 AC_SUBST(DEFINES)
1147
1148 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1149   config_makefile=
1150 else
1151   config_makefile=Makefile
1152 fi
1153
1154 VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
1155 AC_SUBST(VERSION)
1156
1157 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
1158           [echo '$config_vars' >> config.make; test -d bits || mkdir bits])