dnl Process this file with autoconf to produce a configure script. AC_REVISION([$CVSid$]) AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required. AC_INIT([GNU C Library], [(see version.h)], [glibc]) AC_CONFIG_SRCDIR([include/features.h]) AC_CONFIG_HEADERS([config.h]) AC_CONFIG_AUX_DIR([scripts]) dnl This is here so we can set $subdirs directly based on configure fragments. AC_CONFIG_SUBDIRS() AC_CANONICAL_HOST AC_PROG_CC if test $host != $build; then AC_CHECK_PROGS(BUILD_CC, gcc cc) fi AC_SUBST(cross_compiling) AC_PROG_CPP # We need the C++ compiler only for testing. AC_PROG_CXX if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then AC_MSG_ERROR([you must configure in a separate build directory]) fi # This will get text that should go into config.make. config_vars= # Check for a --with-gd argument and set libgd-LDFLAGS in config.make. AC_ARG_WITH([gd], AC_HELP_STRING([--with-gd=DIR], [find libgd include dir and library with prefix DIR]), [dnl case "$with_gd" in yes|''|no) ;; *) libgd_include="-I$withval/include" libgd_ldflags="-L$withval/lib" ;; esac ]) AC_ARG_WITH([gd-include], AC_HELP_STRING([--with-gd-include=DIR], [find libgd include files in DIR]), [dnl case "$with_gd_include" in ''|no) ;; *) libgd_include="-I$withval" ;; esac ]) AC_ARG_WITH([gd-lib], AC_HELP_STRING([--with-gd-lib=DIR], [find libgd library files in DIR]), [dnl case "$with_gd_lib" in ''|no) ;; *) libgd_ldflags="-L$withval" ;; esac ]) if test -n "$libgd_include"; then config_vars="$config_vars CFLAGS-memusagestat.c = $libgd_include" fi if test -n "$libgd_ldflags"; then config_vars="$config_vars libgd-LDFLAGS = $libgd_ldflags" fi dnl Arguments to specify presence of other packages/features. AC_ARG_WITH([fp], AC_HELP_STRING([--with-fp], [if using floating-point hardware @<:@default=yes@:>@]), [with_fp=$withval], [with_fp=yes]) AC_SUBST(with_fp) AC_ARG_WITH([binutils], AC_HELP_STRING([--with-binutils=PATH], [specify location of binutils (as and ld)]), [path_binutils=$withval], [path_binutils='']) AC_ARG_WITH([elf], AC_HELP_STRING([--with-elf], [if using the ELF object format]), [elf=$withval], [elf=no]) AC_ARG_WITH([selinux], AC_HELP_STRING([--with-selinux], [if building with SELinux support]), [with_selinux=$withval], [with_selinux=auto]) AC_ARG_WITH([xcoff], AC_HELP_STRING([--with-xcoff], [if using the XCOFF object format]), [xcoff=$withval], [xcoff=no]) AC_ARG_WITH([cvs], AC_HELP_STRING([--without-cvs], [if CVS should not be used]), [with_cvs=$withval], [with_cvs=yes]) if test "$with_cvs" = yes; then if test -d $srcdir/CVS && grep :pserver: $srcdir/CVS/Root > /dev/null then with_cvs=no fi fi AC_SUBST(with_cvs) AC_ARG_WITH([headers], AC_HELP_STRING([--with-headers=PATH], [location of system headers to use (for example /usr/src/linux/include) @<:@default=compiler default@:>@]), [sysheaders=$withval], [sysheaders='']) AC_ARG_ENABLE([sanity-checks], AC_HELP_STRING([--disable-sanity-checks], [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]), [enable_sanity=$enableval], [enable_sanity=yes]) AC_SUBST(enable_check_abi) AC_ARG_ENABLE([check-abi], AC_HELP_STRING([--enable-check-abi], [do "make check-abi" in "make check" (no/warn/yes) @<:@default=no@:>@]), [enable_check_abi=$enableval], [enable_check_abi=no]) dnl Arguments to enable or disable building the static, shared, profiled, dnl and -fomit-frame-pointer libraries. dnl I've disabled this for now since we cannot build glibc without static dnl libraries built in the moment. dnl AC_ARG_ENABLE([static], dnl AC_HELP_STRING([--enable-static], dnl [build static library @<:@default=yes@:>@]), dnl [static=$enableval], dnl [static=yes]) static=yes AC_ARG_ENABLE([shared], AC_HELP_STRING([--enable-shared], [build shared library @<:@default=yes if GNU ld & ELF@:>@]), [shared=$enableval], [shared=default]) AC_ARG_ENABLE([profile], AC_HELP_STRING([--enable-profile], [build profiled library @<:@default=no@:>@]), [profile=$enableval], [profile=no]) AC_ARG_ENABLE([omitfp], AC_HELP_STRING([--enable-omitfp], [build undebuggable optimized library @<:@default=no@:>@]), [omitfp=$enableval], [omitfp=no]) AC_ARG_ENABLE([bounded], AC_HELP_STRING([--enable-bounded], [build with runtime bounds checking @<:@default=no@:>@]), [bounded=$enableval], [bounded=no]) AC_ARG_ENABLE([versioning], AC_HELP_STRING([--disable-versioning], [do not include versioning information in the library objects @<:@default=yes if supported@:>@]), [enable_versioning=$enableval], [enable_versioning=yes]) AC_ARG_ENABLE([oldest-abi], AC_HELP_STRING([--enable-oldest-abi=ABI], [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]), [oldest_abi=$enableval], [oldest_abi=no]) if test "$oldest_abi" = yes || test "$oldest_abi" = no; then oldest_abi=default else AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi") fi AC_SUBST(oldest_abi) AC_ARG_ENABLE([stackguard-randomization], AC_HELP_STRING([--enable-stackguard-randomization], [initialize __stack_chk_guard canary with a random number at program start]), [enable_stackguard_randomize=$enableval], [enable_stackguard_randomize=no]) if test "$enable_stackguard_randomize" = yes; then AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE) fi dnl Generic infrastructure for drop-in additions to libc. AC_ARG_ENABLE([add-ons], AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@], [configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]), , [enable_add_ons=yes]) dnl Let the user avoid using TLS. Don't know why but... AC_ARG_WITH([tls], AC_HELP_STRING([--with-tls], [enable support for TLS]), [usetls=$withval], [usetls=yes]) AC_ARG_WITH([__thread], AC_HELP_STRING([--without-__thread], [do not use TLS features even when supporting them]), [use__thread=$withval], [use__thread=yes]) AC_ARG_ENABLE([hidden-plt], AC_HELP_STRING([--disable-hidden-plt], [do not hide internal function calls to avoid PLT]), [hidden=$enableval], [hidden=yes]) if test "x$hidden" = xno; then AC_DEFINE(NO_HIDDEN) fi AC_ARG_ENABLE([bind-now], AC_HELP_STRING([--enable-bind-now], [disable lazy relocations in DSOs]), [bindnow=$enableval], [bindnow=no]) AC_SUBST(bindnow) dnl On some platforms we cannot use dynamic loading. We must provide dnl static NSS modules. AC_ARG_ENABLE([static-nss], AC_HELP_STRING([--enable-static-nss], [build static NSS modules @<:@default=no@:>@]), [static_nss=$enableval], [static_nss=no]) dnl Enable static NSS also if we build no shared objects. if test x"$static_nss" = xyes || test x"$shared" = xno; then static_nss=yes AC_DEFINE(DO_STATIC_NSS) fi AC_ARG_ENABLE([force-install], AC_HELP_STRING([--disable-force-install], [don't force installation of files from this package, even if they are older than the installed files]), [force_install=$enableval], [force_install=yes]) AC_SUBST(force_install) dnl On some platforms we allow dropping compatibility with all kernel dnl versions. AC_ARG_ENABLE([kernel], AC_HELP_STRING([--enable-kernel=VERSION], [compile for compatibility with kernel not older than VERSION]), [minimum_kernel=$enableval], []) dnl Prevent unreasonable values. if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then # Better nothing than this. minimum_kernel="" else if test "$minimum_kernel" = current; then minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel= fi fi dnl For the development we sometimes want gcc to issue even more warnings. dnl This is not the default since many of the extra warnings are not dnl appropriate. AC_ARG_ENABLE([all-warnings], AC_HELP_STRING([--enable-all-warnings], [enable all useful warnings gcc can issue]), [all_warnings=$enableval], []) AC_SUBST(all_warnings) AC_ARG_ENABLE([multi-arch], AC_HELP_STRING([--enable-multi-arch], [enable single DSO with optimizations for multiple architectures]), [multi_arch=$enableval], [multi_arch=no]) if test x"$multi_arch" = xyes; then AC_DEFINE(USE_MULTIARCH) multi_arch_d=/multiarch fi AC_SUBST(multi_arch) AC_ARG_ENABLE([experimental-malloc], AC_HELP_STRING([--enable-experimental-malloc], [enable experimental malloc features]), [experimental_malloc=$enableval], []) AC_SUBST(experimental_malloc) AC_ARG_ENABLE([nss-crypt], AC_HELP_STRING([--enable-nss-crypt], [enable libcrypt to use nss]), [nss_crypt=$enableval], [nss_crypt=no]) if test x$nss_crypt = xyes; then nss_includes=-I$(nss-config --includedir 2>/dev/null) if test $? -ne 0; then AC_MSG_ERROR([cannot find include directory with nss-config]) fi old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $nss_includes" AC_COMPILE_IFELSE([typedef int PRBool; #include #include void f (void) { NSSLOW_Init (); }], libc_cv_nss_crypt=yes, AC_MSG_ERROR([ cannot find NSS headers with lowlevel hash function interfaces])) old_LIBS="$LIBS" LIBS="$LIBS -lfreebl3" AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; #include #include ], [NSSLOW_Init();])], libc_cv_nss_crypt=yes, AC_MSG_ERROR([ cannot link program using lowlevel NSS hash functions])) CFLAGS="$old_CFLAGS" LIBS="$old_LIBS" else libc_cv_nss_crypt=no fi AC_SUBST(libc_cv_nss_crypt) # The way shlib-versions is used to generate soversions.mk uses a # fairly simplistic model for name recognition that can't distinguish # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can # tell. This doesn't get used much beyond that, so it's fairly safe. case "$host_os" in linux*) ;; gnu*) host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'` ;; esac # We keep the original values in `$config_*' and never modify them, so we # can write them unchanged into config.make. Everything else uses # $machine, $vendor, and $os, and changes them whenever convenient. config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os # Don't allow vendor == "unknown" test "$config_vendor" = unknown && config_vendor= config_os="`echo $config_os | sed 's/^unknown-//'`" # Some configurations imply other options. case "$host_os" in # i586-linuxaout is mangled into i586-pc-linux-gnuaout linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*) ;; gnu* | linux* | freebsd* | netbsd* | sysv4* | solaris2* | irix6*) # These systems (almost) always use the ELF format. elf=yes ;; aix*) # These systems are always xcoff xcoff=yes elf=no ;; esac # The configure fragment of an add-on port can modify these to supplement # or override the table in the case statement below. No fragment should # ever change the config_* variables, however. machine=$config_machine vendor=$config_vendor os=$config_os base_os='' # config.guess on some IBM machines says `rs6000' instead of `powerpc'. # Unify this here. if test "$machine" = rs6000; then machine="powerpc" fi # Braindead PowerPC box with absolutely no FPU. case "$machine-$host_os" in powerpc*-*soft) with_fp=no ;; esac submachine= AC_ARG_WITH([cpu], AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]), [dnl case "$withval" in yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;; no) ;; *) submachine="$withval" ;; esac ]) # An add-on can set this when it wants to disable the sanity check below. libc_config_ok=no dnl Having this here, though empty, makes sure that if add-ons' fragments dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then dnl our AC_OUTPUT will actually use it. AC_CONFIG_SUBDIRS() case "$enable_add_ons" in ''|no) add_ons= ;; yes|'*') add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps | sed 's@/[[^/]]*$@@' | sort | uniq` add_ons_automatic=yes ;; *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'` add_ons_automatic=no ;; esac configured_add_ons= add_ons_sfx= add_ons_pfx= if test x"$add_ons" != x; then for f in $add_ons; do # Some sanity checks case "$f" in crypt) AC_MSG_ERROR([ *** It seems that you're using an old \`crypt' add-on. crypt is now *** part of glibc and using the old add-on will not work with this *** release. Start again with fresh sources and without the old *** \`crypt' add-on.]) ;; localedata) AC_MSG_ERROR([ *** It seems that you're using an old \`localedata' add-on. localedata *** is now part of glibc and using the old add-on will not work with *** this release. Start again with fresh sources and without the old *** \`localedata' add-on.]) ;; esac done # Now source each add-on's configure fragment. # The fragments can use $srcdir/$libc_add_on to find themselves, # and test $add_ons_automatic to see if they were explicitly requested. # A fragment can clear (or even change) $libc_add_on to affect # whether it goes into the list to be actually used in the build. use_add_ons= for libc_add_on in $add_ons; do # Test whether such a directory really exists. # It can be absolute, or relative to $srcdir, or relative to the build dir. case "$libc_add_on" in /*) libc_add_on_srcdir=$libc_add_on ;; *) test -d "$srcdir/$libc_add_on" || { if test -d "$libc_add_on"; then libc_add_on="`pwd`/$libc_add_on" else AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist) fi } libc_add_on_srcdir=$srcdir/$libc_add_on ;; esac libc_add_on_frag=$libc_add_on_srcdir/configure libc_add_on_canonical= libc_add_on_config_subdirs= if test -r "$libc_add_on_frag"; then AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on) libc_add_on_canonical=unknown libc_add_on_subdirs= . "$libc_add_on_frag" test -z "$libc_add_on" || { configured_add_ons="$configured_add_ons $libc_add_on" if test "x$libc_add_on_canonical" = xunknown; then AC_MSG_ERROR(fragment must set \$libc_add_on_canonical) fi for d in $libc_add_on_subdirs; do case "$libc_add_on" in /*) subdir_srcdir="$libc_add_on" ;; *) subdir_srcdir="\$(..)$libc_add_on" ;; esac case "$d" in .) d="${libc_add_on_canonical:-$libc_add_on}" ;; /*) subdir_srcdir="$d" ;; *) subdir_srcdir="$subdir_srcdir/$d" ;; esac d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'` add_on_subdirs="$add_on_subdirs $d" test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars $d-srcdir = $subdir_srcdir" done for d in $libc_add_on_config_subdirs; do case "$d" in /*) AC_MSG_ERROR(dnl fragment uses absolute path in \$libc_add_on_config_subdirs) ;; esac if test ! -d "$libc_add_on_srcdir/$d"; then AC_MSG_ERROR(fragment wants to configure missing directory $d) fi case "$libc_add_on" in /*) AC_MSG_ERROR(dnl relative path required for add-on using \$libc_add_on_config_subdirs) ;; esac subdirs="$subdirs $libc_add_on/$d" done } fi if test -n "$libc_add_on"; then if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null` then AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments) for frag in $frags; do name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'` echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD . "$frag" done AC_MSG_RESULT() fi use_add_ons="$use_add_ons $libc_add_on" add_ons_pfx="$add_ons_pfx $libc_add_on/" test -z "$libc_add_on_canonical" || add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical" fi done # Use echo to strip excess whitespace. add_ons="`echo $use_add_ons`" fi AC_SUBST(add_ons) AC_SUBST(add_on_subdirs) ### ### I put this here to prevent those annoying emails from people who cannot ### read and try to compile glibc on unsupported platforms. --drepper ### ### By using the undocumented --enable-hacker-mode option for configure ### one can skip this test to make the configuration not fail for unsupported ### platforms. ### if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then case "$machine-$host_os" in *-linux* | *-gnu* | arm*-none* | powerpc-aix4.3.*) ;; *) echo "*** The GNU C library is currently not available for this platform." echo "*** So far nobody cared to port it and if there is no volunteer it" echo "*** might never happen. So, if you have interest to see glibc on" echo "*** this platform visit" echo "*** http://www.gnu.org/software/libc/porting.html" echo "*** and join the group of porters" exit 1 ;; esac fi dnl We need to use [ and ] for other purposes for a while now. changequote(,)dnl # Expand the configuration machine name into a subdirectory by architecture # type and particular chip. If an add-on configure fragment already set # base_machine, we don't change it. test -n "$base_machine" || case "$machine" in a29k | am29000) base_machine=a29k machine=a29k ;; c3[012]) base_machine=cx0 machine=cx0/c30 ;; c4[04]) base_machine=cx0 machine=cx0/c40 ;; i[34567]86) base_machine=i386 machine=i386/$machine ;; ia64) base_machine=ia64 machine=ia64 ;; m88???) base_machine=m88k machine=m88k/$machine ;; m88k) base_machine=m88k machine=m88k/m88100 ;; powerpc) base_machine=powerpc machine=powerpc/powerpc32 ;; powerpc64) base_machine=powerpc machine=powerpc/powerpc64 ;; s390) base_machine=s390 machine=s390/s390-32 ;; s390x) base_machine=s390 machine=s390/s390-64 ;; sh3*) base_machine=sh machine=sh/sh3 ;; sh4*) base_machine=sh machine=sh/sh4 ;; sparc | sparcv[67]) base_machine=sparc machine=sparc/sparc32 ;; sparcv8 | supersparc | hypersparc) base_machine=sparc machine=sparc/sparc32/sparcv8 ;; sparcv8plus | sparcv8plusa | sparcv9) base_machine=sparc machine=sparc/sparc32/sparcv9 ;; sparcv8plusb | sparcv9b) base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9b ;; sparcv9v) base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v ;; sparcv9v2) base_machine=sparc machine=sparc/sparc32/sparcv9/sparcv9v2 ;; sparc64) base_machine=sparc machine=sparc/sparc64 ;; sparc64b) base_machine=sparc machine=sparc/sparc64/sparcv9b ;; sparc64v) base_machine=sparc machine=sparc/sparc64/sparcv9v ;; sparc64v2) base_machine=sparc machine=sparc/sparc64/sparcv9v2 ;; *) base_machine=$machine ;; esac changequote([,])dnl AC_SUBST(base_machine) if test "$base_machine" = "i386"; then AC_DEFINE(USE_REGPARMS) fi # Compute the list of sysdep directories for this configuration. # This can take a while to compute. sysdep_dir=$srcdir/sysdeps AC_MSG_CHECKING(sysdep dirs) dnl We need to use [ and ] for other purposes for a while now. changequote(,)dnl # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1. os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`" test "x$base_os" != x || case "$os" in gnu*) base_os=mach/hurd ;; netbsd* | 386bsd* | freebsd* | bsdi*) base_os=unix/bsd/bsd4.4 ;; osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*) base_os=unix/bsd ;; sysv* | isc* | esix* | sco* | minix* | irix4* | linux*) base_os=unix/sysv ;; irix6*) base_os=unix/sysv/irix6/$os ;; solaris[2-9]*) base_os=unix/sysv/sysv4 ;; hpux*) base_os=unix/sysv/hpux/$os ;; aix4.3*) base_os=unix/sysv/aix/aix4.3 ;; none) base_os=standalone ;; esac # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. tail=$os ostry=$os while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do ostry="$ostry /$o" tail=$o done o=`echo $tail | sed 's/[0-9]*$//'` if test $o != $tail; then ostry="$ostry /$o" fi # For linux-gnu, try linux-gnu, then linux. o=`echo $tail | sed 's/-.*$//'` if test $o != $tail; then ostry="$ostry /$o" fi # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix. base= tail=$base_os while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do set $b base="$base /$1" tail="$2" done # For sparc/sparc32, try sparc/sparc32 and then sparc. mach= tail=$machine${submachine:+/$submachine} while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do set $m # Prepend the machine's FPU directory unless --without-fp. if test "$with_fp" = yes; then mach="$mach /$1/fpu" else mach="$mach /$1/nofpu" fi mach="$mach /$1" tail="$2" done dnl We are done with glob and regexp uses of [ and ]; return to autoconf. changequote([,])dnl # Find what sysdep directories exist. sysnames_add_ons= sysnames= for b in $base ''; do for m0 in $mach ''; do for v in /$vendor ''; do test "$v" = / && continue for o in /$ostry ''; do test "$o" = / && continue for m in $multi_arch_d $mach ''; do for d in $add_ons_pfx ''; do for a in $add_ons_sfx ''; do if test -n "$m0$m0sub$b$v$o$m$msub"; then try_srcdir="${srcdir}/" case "$d" in /*) try_srcdir= ;; esac try="${d}sysdeps$m0$m0sub$b$v$o$m$msub$a" test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2 if test -d "$try_srcdir$try"; then sysnames="$sysnames $try" { test -n "$o" || test -n "$b"; } && os_used=t { test -n "$m" || test -n "$m0"; } && machine_used=t case x${m0:-$m} in x*/$submachine) submachine_used=t ;; esac if test -n "$d"; then case "$sysnames_add_ons" in *" $d "*) ;; *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; esac fi fi fi done done done done done done done if test -z "$os_used" && test "$os" != none; then AC_MSG_ERROR(Operating system $os is not supported.) fi if test -z "$machine_used" && test "$machine" != none; then AC_MSG_ERROR(The $machine is not supported.) fi if test -z "$submachine_used" && test -n "$submachine"; then AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.) fi AC_SUBST(submachine) # We have now validated the configuration. # If using ELF, look for an `elf' subdirectory of each machine directory. # We prepend these rather than inserting them whereever the machine appears # because things specified by the machine's ELF ABI should override # OS-specific things, and should always be the same for any OS on the # machine (otherwise what's the point of an ABI?). if test "$elf" = yes; then elf_dirs= for d in $add_ons_pfx ''; do for m in $mach; do if test -d $srcdir/${d}sysdeps$m/elf; then elf_dirs="$elf_dirs ${d}sysdeps$m/elf" fi done done sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames" fi # Expand the list of system names into a full list of directories # from each element's parent name and Implies file (if present). set $sysnames names= while test $# -gt 0; do name=$1 shift case " $names " in *" $name "*) # Already in the list. continue esac # Report each name as we discover it, so there is no long pause in output. echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'` case $name in /*) xsrcdir= ;; *) xsrcdir=$srcdir/ ;; esac test -n "$enable_debug_configure" && echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2 if test -f $xsrcdir$name/Implies; then # Collect more names from the `Implies' file (removing comments). implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`" implied= for x in $implied_candidate; do found=no if test -d $xsrcdir$name_base/$x; then implied="$implied $name_base/$x"; found=yes fi for d in $add_ons_pfx ''; do try="${d}sysdeps/$x" case $d in /*) try_srcdir= ;; *) try_srcdir=$srcdir/ ;; esac test -n "$enable_debug_configure" && echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2 if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try; then implied="$implied $try" found=yes case "$sysnames_add_ons" in *" $d "*) ;; *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; esac fi done if test $found = no; then AC_MSG_WARN($name/Implies specifies nonexistent $x) fi done else implied= fi # Add NAME to the list of names. names="$names $name" # Find the parent of NAME, using the empty string if it has none. changequote(,)dnl parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`" changequote([,])dnl # Add the names implied by NAME, and NAME's parent (if it has one), to # the list of names to be processed (the argument list). We prepend the # implied names to the list and append the parent. We want implied # directories to come before further directories inferred from the # configuration components; this ensures that for sysv4, unix/common # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*) # after sysv4). sysnames="`echo $implied $* $parent`" test -n "$sysnames" && set $sysnames done # Add the default directories. default_sysnames=sysdeps/generic if test "$elf" = yes; then default_sysnames="sysdeps/generic/elf $default_sysnames" fi sysnames="$names $default_sysnames" AC_SUBST(sysnames) # The other names were emitted during the scan. AC_MSG_RESULT($default_sysnames) # Collect the list of add-ons that supply partial sysdeps trees. sysdeps_add_ons= for add_on in $add_ons; do case "$add_on" in /*) xsrcdir= ;; *) xsrcdir="$srcdir/" ;; esac test -d "$xsrcdir$add_on/sysdeps" || { case "$configured_add_ons " in *" $add_on "*) ;; *|'') AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree) ;; esac continue } sysdeps_add_ons="$sysdeps_add_ons $add_on" case "$sysnames_add_ons" in *" $add_on/ "*) ;; *|'') AC_MSG_WARN(add-on $add_on contributed no sysdeps directories) continue ;; esac found=no for d in $sysnames; do case "$d" in $add_on/sysdeps/*) ;; *) continue ;; esac (cd "$xsrcdir$d" && for f in *[[!~]]; do case "$f" in sys|bits) for ff in $f/*.h; do test -d "$ff" || { test -e "$ff" && exit 88; } done ;; *) test -d "$f" || { test -e "$f" && exit 88; } ;; esac done) if test $? -eq 88; then found=yes break fi done if test $found = no; then AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories) fi done AC_SUBST(sysdeps_add_ons) ### Locate tools. AC_PROG_INSTALL if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then # The makefiles need to use a different form to find it in $srcdir. INSTALL='\$(..)./scripts/install-sh -c' fi AC_PROG_LN_S LIBC_PROG_BINUTILS AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in # Accept binutils 2.13 or newer. AC_CHECK_PROG_VER(AS, $AS, --version, [GNU assembler.* \([0-9]*\.[0-9.]*\)], [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9]*|[3-9].*], AS=: critic_missing="$critic_missing as") AC_CHECK_PROG_VER(LD, $LD, --version, [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)], [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9]*]|[3-9].*, LD=: critic_missing="$critic_missing ld") # We need the physical current working directory. We cannot use the # "pwd -P" shell builtin since that's not portable. Instead we try to # find a pwd binary. Note that assigning to the PWD environment # variable might have some interesting side effects, so we don't do # that. AC_PATH_PROG(PWD_P, pwd, no) if test "$PWD_P" = no; then AC_MSG_ERROR(*** A pwd binary could not be found.) fi # These programs are version sensitive. AC_CHECK_TOOL_PREFIX AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v, [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ], critic_missing="$critic_missing gcc") AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version, [GNU Make[^0-9]*\([0-9][0-9.]*\)], [3.79* | 3.[89]*], critic_missing="$critic_missing make") AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version, [GNU gettext.* \([0-9]*\.[0-9.]*\)], [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*], MSGFMT=: aux_missing="$aux_missing msgfmt") AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version, [GNU texinfo.* \([0-9][0-9.]*\)], [4.*], MAKEINFO=: aux_missing="$aux_missing makeinfo") AC_CHECK_PROG_VER(SED, sed, --version, [GNU sed version \([0-9]*\.[0-9.]*\)], [3.0[2-9]*|3.[1-9]*|[4-9]*], SED=: aux_missing="$aux_missing sed") AC_CHECK_PROGS(AUTOCONF, autoconf, no) case "x$AUTOCONF" in xno|x|x:) AUTOCONF=no ;; *) AC_CACHE_CHECK(dnl whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl if (cd $srcdir; $AUTOCONF $ACFLAGS configure.in > /dev/null 2>&1); then libc_cv_autoconf_works=yes else libc_cv_autoconf_works=no fi]) test $libc_cv_autoconf_works = yes || AUTOCONF=no ;; esac if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then # If --without-cvs they probably won't change configure.in, so no complaints. aux_missing="$aux_missing autoconf" fi test -n "$critic_missing" && AC_MSG_ERROR([ *** These critical programs are missing or too old:$critic_missing *** Check the INSTALL file for required versions.]) test -n "$aux_missing" && AC_MSG_WARN([ *** These auxiliary programs are missing or incompatible versions:$aux_missing *** some features will be disabled. *** Check the INSTALL file for required versions.]) # if using special system headers, find out the compiler's sekrit # header directory and add that to the list. NOTE: Only does the right # thing on a system that doesn't need fixincludes. (Not presently a problem.) if test -n "$sysheaders"; then SYSINCLUDES=-nostdinc for d in include include-fixed; do i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" && SYSINCLUDES="$SYSINCLUDES -isystem $i" done SYSINCLUDES="$SYSINCLUDES \ -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`" if test -n "$CXX"; then cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` && cxxmachine=`$CXX -dumpmachine 2>&AS_MESSAGE_LOG_FD` && cxxheaders=`$CXX -print-file-name=../../../../include/c++/`"$cxxversion" && CXX_SYSINCLUDES="-isystem $cxxheaders \ -isystem $cxxheaders/$cxxmachine -isystem $cxxheaders/backward" fi fi AC_SUBST(SYSINCLUDES) AC_SUBST(CXX_SYSINCLUDES) # check if ranlib is necessary AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl cat > conftest.c <&1 | grep -q 'unrecognized option.*static-libgcc'; then libc_cv_gcc_static_libgcc= else libc_cv_gcc_static_libgcc=-static-libgcc fi]) AC_SUBST(libc_cv_gcc_static_libgcc) AC_PATH_PROG(BASH_SHELL, bash, no) if test "$BASH_SHELL" != no && $BASH_SHELL -c 'test "$BASH_VERSINFO" \ && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then libc_cv_have_bash2=yes else libc_cv_have_bash2=no fi AC_SUBST(libc_cv_have_bash2) dnl We need a ksh compatible shell for tzselect. if test "$BASH_SHELL" = no; then AC_PATH_PROG(KSH, ksh, no) if test "$KSH" = no; then libc_cv_have_ksh=no else libc_cv_have_ksh=yes fi else KSH="$BASH_SHELL" AC_SUBST(KSH) libc_cv_have_ksh=yes fi AC_SUBST(libc_cv_have_ksh) AC_PROG_AWK AC_PATH_PROG(PERL, perl, no) if test "$PERL" != no && (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then PERL=no fi AC_PATH_PROG(INSTALL_INFO, install-info, no, $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin) AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin) AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl echo '#include FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c if eval "$ac_cpp conftest.c 2>/dev/null" \ | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then libc_cv_signed_size_t=no else libc_cv_signed_size_t=yes fi rm -f conftest*]) if test $libc_cv_signed_size_t = yes; then dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings. cat >> confdefs.h <<\EOF #undef __SIZE_TYPE__ #define __SIZE_TYPE__ unsigned EOF fi AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl AC_TRY_COMPILE(dnl [#define __need_size_t #define __need_wchar_t #include #define __need_NULL #include ], [size_t size; wchar_t wchar; #ifdef offsetof #error stddef.h ignored __need_* #endif if (&size == NULL || &wchar == NULL) abort ();], libc_cv_friendly_stddef=yes, libc_cv_friendly_stddef=no)]) if test $libc_cv_friendly_stddef = yes; then config_vars="$config_vars override stddef.h = # The installed seems to be libc-friendly." fi AC_CACHE_CHECK(whether we need to use -P to assemble .S files, libc_cv_need_minus_P, [dnl cat > conftest.S <&AS_MESSAGE_LOG_FD); then libc_cv_need_minus_P=no else libc_cv_need_minus_P=yes fi rm -f conftest*]) if test $libc_cv_need_minus_P = yes; then config_vars="$config_vars asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives." fi AC_MSG_CHECKING(whether .text pseudo-op must be used) AC_CACHE_VAL(libc_cv_dot_text, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_dot_text=.text fi rm -f conftest*]) if test -z "$libc_cv_dot_text"; then AC_MSG_RESULT(no) else AC_MSG_RESULT(yes) fi AC_CACHE_CHECK(for assembler global-symbol directive, libc_cv_asm_global_directive, [dnl libc_cv_asm_global_directive=UNKNOWN for ac_globl in .globl .global .EXPORT; do cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_global_directive=${ac_globl} fi rm -f conftest* test $libc_cv_asm_global_directive != UNKNOWN && break done]) if test $libc_cv_asm_global_directive = UNKNOWN; then AC_MSG_ERROR(cannot determine asm global directive) else AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive}) fi AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl cat > conftest.s < conftest1.c <<\EOF extern int glibc_conftest_frobozz; void _start() { glibc_conftest_frobozz = 1; } EOF if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ -nostartfiles -nostdlib \ -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then libc_cv_asm_set_directive=yes else libc_cv_asm_set_directive=no fi rm -f conftest*]) if test $libc_cv_asm_set_directive = yes; then AC_DEFINE(HAVE_ASM_SET_DIRECTIVE) fi AC_CACHE_CHECK(for assembler .type directive prefix, libc_cv_asm_type_prefix, [dnl libc_cv_asm_type_prefix=no for ac_try_prefix in '@' '%' '#'; do cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_type_prefix=${ac_try_prefix} fi rm -f conftest* test "x$libc_cv_asm_type_prefix" != xno && break done]) if test "x$libc_cv_asm_type_prefix" != xno; then AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix}) fi AC_CACHE_CHECK(for assembler gnu_unique_object symbol type, libc_cv_asm_unique_object, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then libc_cv_asm_unique_object=yes else libc_cv_asm_unique_object=no fi rm -f conftest*]) if test $libc_cv_asm_unique_object = yes; then AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT) fi # For the multi-arch option we need support in the assembler. if test "$multi_arch" = yes; then if test "x$libc_cv_asm_type_prefix" != xno; then AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type support], libc_cv_asm_gnu_indirect_function, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then libc_cv_asm_gnu_indirect_function=yes else libc_cv_asm_gnu_indirect_function=no fi rm -f conftest*]) else libc_cv_asm_gnu_indirect_function=no fi if test x"$libc_cv_asm_gnu_indirect_function" != xyes; then AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support]) fi fi AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive, [cat > conftest.s <&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then libc_cv_asm_symver_directive=yes else libc_cv_asm_symver_directive=no fi rm -f conftest*]) AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl if test $libc_cv_asm_symver_directive = yes; then cat > conftest.s < conftest.map <&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared -o conftest.so conftest.o -nostartfiles -nostdlib -Wl,--version-script,conftest.map 1>&AS_MESSAGE_LOG_FD]); then libc_cv_ld_version_script_option=yes else libc_cv_ld_version_script_option=no fi else libc_cv_ld_version_script_option=no fi else libc_cv_ld_version_script_option=no fi rm -f conftest*]) if test $shared != no && test $libc_cv_asm_symver_directive = yes && test $libc_cv_ld_version_script_option = yes && test $enable_versioning = yes; then VERSIONING=yes AC_DEFINE(DO_VERSIONING) else VERSIONING=no fi AC_SUBST(VERSIONING) if test $elf = yes && test $shared != no && test $VERSIONING = no; then echo "\ *** WARNING: You should not compile GNU libc without versioning. Not using *** versioning will introduce incompatibilities so that old binaries *** will not run anymore. *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)." fi if test $elf = yes; then AC_CACHE_CHECK(for .previous assembler directive, libc_cv_asm_previous_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_previous_directive=yes else libc_cv_asm_previous_directive=no fi rm -f conftest*]) if test $libc_cv_asm_previous_directive = yes; then AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE) else AC_CACHE_CHECK(for .popsection assembler directive, libc_cv_asm_popsection_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_popsection_directive=yes else libc_cv_asm_popsection_directive=no fi rm -f conftest*]) if test $libc_cv_asm_popsection_directive = yes; then AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE) fi fi AC_CACHE_CHECK(for .protected and .hidden assembler directive, libc_cv_asm_protected_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_protected_directive=yes else AC_MSG_ERROR(assembler support for symbol visibility is required) fi rm -f conftest*]) if test $libc_cv_asm_protected_directive = yes; then AC_CACHE_CHECK(whether __attribute__((visibility())) is supported, libc_cv_visibility_attribute, [cat > conftest.c <&AS_MESSAGE_LOG_FD); then if grep '\.hidden.*foo' conftest.s >/dev/null; then if grep '\.protected.*bar' conftest.s >/dev/null; then libc_cv_visibility_attribute=yes fi fi fi rm -f conftest.[cs] ]) if test $libc_cv_visibility_attribute != yes; then AC_MSG_ERROR(compiler support for visibility attribute is required) fi fi if test $libc_cv_visibility_attribute = yes; then AC_CACHE_CHECK(for broken __attribute__((visibility())), libc_cv_broken_visibility_attribute, [cat > conftest.c <&AS_MESSAGE_LOG_FD); then changequote(,)dnl if grep '\.hidden[ _]foo' conftest.s >/dev/null; then changequote([,])dnl libc_cv_broken_visibility_attribute=no fi fi rm -f conftest.c conftest.s ]) if test $libc_cv_broken_visibility_attribute = yes; then AC_MSG_ERROR(working compiler support for visibility attribute is required) fi fi AC_CACHE_CHECK(for broken __attribute__((alias())), libc_cv_broken_alias_attribute, [cat > conftest.c <&AS_MESSAGE_LOG_FD); then if grep 'xyzzy' conftest.s >/dev/null && grep 'abccb' conftest.s >/dev/null; then libc_cv_broken_alias_attribute=no fi fi rm -f conftest.c conftest.s ]) if test $libc_cv_broken_alias_attribute = yes; then AC_MSG_ERROR(working alias attribute support required) fi if test $libc_cv_visibility_attribute = yes; then AC_CACHE_CHECK(whether to put _rtld_local into .sdata section, libc_cv_have_sdata_section, [echo "int i;" > conftest.c libc_cv_have_sdata_section=no if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \ | grep '\.sdata' >/dev/null; then libc_cv_have_sdata_section=yes fi rm -f conftest.c conftest.so ]) if test $libc_cv_have_sdata_section = yes; then AC_DEFINE(HAVE_SDATA_SECTION) fi fi AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support, libc_cv_initfini_array, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then libc_cv_initfini_array=yes else libc_cv_initfini_array=no fi else libc_cv_initfini_array=no fi rm -f conftest*]) if test $libc_cv_initfini_array != yes; then AC_MSG_ERROR([Need linker with .init_array/.fini_array support.]) fi AC_CACHE_CHECK(for libunwind-support in compiler, libc_cv_cc_with_libunwind, [ cat > conftest.c <&1 >/dev/null | grep -q " -lunwind "; then libc_cv_cc_with_libunwind=yes else libc_cv_cc_with_libunwind=no fi rm -f conftest*]) AC_SUBST(libc_cv_cc_with_libunwind) if test $libc_cv_cc_with_libunwind = yes; then AC_DEFINE(HAVE_CC_WITH_LIBUNWIND) fi AC_CACHE_CHECK(for -z nodelete option, libc_cv_z_nodelete, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_nodelete=yes else AC_MSG_ERROR(linker with -z nodelete support required) fi rm -f conftest*]) AC_CACHE_CHECK(for -z nodlopen option, libc_cv_z_nodlopen, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_nodlopen=yes else AC_MSG_ERROR(linker with -z nodlopen support required) fi rm -f conftest*]) AC_CACHE_CHECK(for -z initfirst option, libc_cv_z_initfirst, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_initfirst=yes else AC_MSG_ERROR(linker with -z initfirst support required) fi rm -f conftest*]) case "$base_machine" in changequote(,)dnl i[34567]86 | x86_64 | powerpc* | s390* | sparc* | alpha*) changequote([,])dnl AC_CACHE_CHECK(for -z relro option, libc_cv_z_relro, [dnl libc_cv_z_relro=no if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD]) then if AC_TRY_COMMAND([${CC-cc} -Wl,--verbose 2>&1|grep DATA_SEGMENT_RELRO_END 1>&AS_MESSAGE_LOG_FD]) then libc_cv_z_relro=yes fi fi]) if test "$libc_cv_z_relro" = no; then AC_MSG_ERROR(linker with -z relro support required) fi ;; *) ;; esac AC_CACHE_CHECK(for -Bgroup option, libc_cv_Bgroup, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_Bgroup=yes else libc_cv_Bgroup=no fi rm -f conftest*]) AC_SUBST(libc_cv_Bgroup) AC_CACHE_CHECK(for libgcc_s suffix, libc_cv_libgcc_s_suffix, [dnl cat > conftest.c <&1 >/dev/null \ | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` changequote([,])dnl rm -f conftest*]) AC_SUBST(libc_cv_libgcc_s_suffix) AC_CACHE_CHECK(for --as-needed option, libc_cv_as_needed, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_as_needed=yes else libc_cv_as_needed=no fi rm -f conftest*]) AC_SUBST(libc_cv_as_needed) ASFLAGS_config= AC_CACHE_CHECK(whether --noexecstack is desirable for .S files, libc_cv_as_noexecstack, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) \ && grep -q .note.GNU-stack conftest.s \ && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD]) then libc_cv_as_noexecstack=yes else libc_cv_as_noexecstack=no fi rm -f conftest*]) if test $libc_cv_as_noexecstack = yes; then ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack" fi AC_SUBST(ASFLAGS_config) AC_CACHE_CHECK(for -z combreloc, libc_cv_z_combreloc, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then dnl The following test is a bit weak. We must use a tool which can test dnl cross-platform since the gcc used can be a cross compiler. Without dnl introducing new options this is not easily doable. Instead use a tool dnl which always is cross-platform: readelf. To detect whether -z combreloc dnl look for a section named .rel.dyn. if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then libc_cv_z_combreloc=yes else libc_cv_z_combreloc=no fi else libc_cv_z_combreloc=no fi rm -f conftest*]) if test "$libc_cv_z_combreloc" = yes; then AC_DEFINE(HAVE_Z_COMBRELOC) fi AC_SUBST(libc_cv_z_combreloc) AC_CACHE_CHECK(for -z execstack, libc_cv_z_execstack, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_execstack=yes else libc_cv_z_execstack=no fi rm -f conftest*]) AC_SUBST(libc_cv_z_execstack) AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_fpie=yes else libc_cv_fpie=no fi rm -f conftest*]) AC_SUBST(libc_cv_fpie) AC_CACHE_CHECK(for --hash-style option, libc_cv_hashstyle, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_hashstyle=yes else libc_cv_hashstyle=no fi rm -f conftest*]) AC_SUBST(libc_cv_hashstyle) fi AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_fno_toplevel_reorder=yes else libc_cv_fno_toplevel_reorder=no fi rm -f conftest*]) if test $libc_cv_fno_toplevel_reorder = yes; then fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors" else fno_unit_at_a_time=-fno-unit-at-a-time fi AC_SUBST(fno_unit_at_a_time) AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_ssp=yes else libc_cv_ssp=no fi rm -f conftest*]) AC_SUBST(libc_cv_ssp) AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_gnu89_inline=yes else libc_cv_gnu89_inline=no fi rm -f conftest*]) if test $libc_cv_gnu89_inline = yes; then libc_cv_gnu89_inline=-fgnu89-inline else libc_cv_gnu89_inline= fi AC_SUBST(libc_cv_gnu89_inline) if test $elf != yes; then AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini, [AC_TRY_COMPILE(, [asm (".section .init"); asm (".section .fini"); asm ("${libc_cv_dot_text}");], libc_cv_have_initfini=yes, libc_cv_have_initfini=no)]) AC_SUBST(libc_cv_have_initfini)dnl if test $libc_cv_have_initfini = yes; then AC_DEFINE(HAVE_INITFINI) fi fi if test $elf = yes; then AC_CACHE_CHECK(whether cc puts quotes around section names, libc_cv_have_section_quotes, [cat > conftest.c </dev/null; then libc_cv_have_section_quotes=yes else libc_cv_have_section_quotes=no fi else libc_cv_have_section_quotes=unknown fi rm -f conftest.[cs] ]) if test $libc_cv_have_section_quotes = yes; then AC_DEFINE(HAVE_SECTION_QUOTES) fi fi dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) AC_DEFUN(AC_CHECK_ASM_UNDERSCORE, [cat > conftest.$ac_ext </dev/null; then ifelse([$1], , :, [rm -f conftest* $1]) else ifelse([$2], , , [rm -f conftest* $2]) fi else echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD ifelse([$2], , , [rm -f conftest* $2]) fi rm -f conftest*]) if test $elf = yes; then libc_cv_asm_underscores=no else if test $ac_cv_prog_cc_works = yes; then AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores, [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();], libc_cv_asm_underscores=yes, libc_cv_asm_underscores=no)]) else AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores, [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes, libc_cv_asm_underscores=no)]) fi fi if test $libc_cv_asm_underscores = no; then AC_DEFINE(NO_UNDERSCORES) fi if test $elf = yes; then libc_cv_weak_symbols=yes fi AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_weak_directive=yes else libc_cv_asm_weak_directive=no fi rm -f conftest*]) if test $libc_cv_asm_weak_directive = no; then AC_CACHE_CHECK(for assembler .weakext directive, libc_cv_asm_weakext_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_weakext_directive=yes else libc_cv_asm_weakext_directive=no fi rm -f conftest*]) fi # no .weak if test $libc_cv_asm_weak_directive = yes; then AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE) elif test $libc_cv_asm_weakext_directive = yes; then AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE) fi AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl case $machine in sparc/sparc64*) cfi_offset=2047;; *) cfi_offset=0;; esac cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_cfi_directives=yes else libc_cv_asm_cfi_directives=no fi rm -f conftest*]) if test $libc_cv_asm_cfi_directives = yes; then AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES) fi AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl cat > conftest.c <<\EOF _start () {} int __eh_pc; __throw () {} EOF dnl No \ in command here because it ends up inside ''. if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles -Wl,--no-whole-archive -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then libc_cv_ld_no_whole_archive=yes else libc_cv_ld_no_whole_archive=no fi rm -f conftest*]) if test $libc_cv_ld_no_whole_archive = yes; then no_whole_archive=-Wl,--no-whole-archive fi AC_SUBST(no_whole_archive)dnl AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl cat > conftest.c <<\EOF _start () {} int __eh_pc; __throw () {} EOF dnl No \ in command here because it ends up inside ''. if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles -fexceptions -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_exceptions=yes else libc_cv_gcc_exceptions=no fi rm -f conftest*]) if test $libc_cv_gcc_exceptions = yes; then exceptions=-fexceptions fi AC_SUBST(exceptions)dnl if test "$host_cpu" = powerpc ; then # Check for a bug present in at least versions 2.8.x of GCC # and versions 1.0.x of EGCS. AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],, libc_cv_c_asmcr0_bug='no', libc_cv_c_asmcr0_bug='yes')]) if test "$libc_cv_c_asmcr0_bug" != 'no'; then AC_DEFINE(BROKEN_PPC_ASM_CR0) fi fi dnl Check whether compiler understands __builtin_expect. AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect, [cat > conftest.c <&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_builtin_expect=yes else libc_cv_gcc_builtin_expect=no fi rm -f conftest*]) if test "$libc_cv_gcc_builtin_expect" = yes; then AC_DEFINE(HAVE_BUILTIN_EXPECT) fi AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl cat > conftest.c <<\EOF void zero (void *x) { __builtin_memset (x, 0, 1000); } EOF dnl if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]); then libc_cv_gcc_builtin_memset=no else libc_cv_gcc_builtin_memset=yes fi rm -f conftest* ]) if test "$libc_cv_gcc_builtin_memset" = yes ; then AC_DEFINE(HAVE_BUILTIN_MEMSET) fi AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl cat > conftest.c <<\EOF extern char *strstr (const char *, const char *) __asm ("my_strstr"); char *foo (const char *a, const char *b) { return __builtin_strstr (a, b); } EOF dnl if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]); then libc_cv_gcc_builtin_redirection=yes else libc_cv_gcc_builtin_redirection=no fi rm -f conftest* ]) if test "$libc_cv_gcc_builtin_redirection" = yes ; then AC_DEFINE(HAVE_BUILTIN_REDIRECTION) fi dnl Check whether the compiler supports the __thread keyword. if test "x$use__thread" != xno; then AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread, [cat > conftest.c <<\EOF __thread int a = 42; EOF if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then libc_cv_gcc___thread=yes else libc_cv_gcc___thread=no fi rm -f conftest*]) if test "$libc_cv_gcc___thread" = yes; then AC_DEFINE(HAVE___THREAD) fi else libc_cv_gcc___thread=no fi if test "$libc_cv_gcc___thread" = yes; then dnl Check whether the compiler supports the tls_model attribute. AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl cat > conftest.c <<\EOF extern __thread int a __attribute__((tls_model ("initial-exec"))); EOF if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_tls_model_attr=yes else libc_cv_gcc_tls_model_attr=no fi rm -f conftest*]) if test "$libc_cv_gcc_tls_model_attr" = yes; then AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE) fi fi if test -n "$submachine"; then AC_CACHE_CHECK([for compiler option for CPU variant], libc_cv_cc_submachine, [dnl libc_cv_cc_submachine=no for opt in "-march=$submachine" "-mcpu=$submachine"; do if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then libc_cv_cc_submachine="$opt" break fi done]) if test "x$libc_cv_cc_submachine" = xno; then AC_MSG_ERROR([${CC-cc} does not support $submachine]) fi fi AC_SUBST(libc_cv_cc_submachine) dnl Check whether we have the gd library available. AC_MSG_CHECKING(for libgd) if test "$with_gd" != "no"; then old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $libgd_include" old_LDFLAGS="$LDFLAGS" LDFLAGS="$LDFLAGS $libgd_ldflags" old_LIBS="$LIBS" LIBS="$LIBS -lgd -lpng -lz -lm" AC_TRY_LINK([#include ], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no) CFLAGS="$old_CFLAGS" LDFLAGS="$old_LDFLAGS" LIBS="$old_LIBS" else LIBGD=no fi AC_MSG_RESULT($LIBGD) AC_SUBST(LIBGD) # SELinux detection if test x$with_selinux = xno ; then have_selinux=no; else # See if we have the SELinux library AC_CHECK_LIB(selinux, is_selinux_enabled, have_selinux=yes, have_selinux=no) # See if we have the SELinux header with the NSCD permissions in it. if test x$have_selinux = xyes ; then AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h]) AC_TRY_COMPILE([#include ], [#ifdef NSCD__SHMEMHOST return 0; #else #error NSCD__SHMEMHOST not defined #endif], have_selinux=yes, have_selinux=no) AC_MSG_RESULT($have_selinux) fi if test x$with_selinux = xyes ; then if test x$have_selinux = xno ; then AC_MSG_ERROR([SELinux explicitly required, but sufficiently recent SELinux library not found]) fi fi fi # Check if we're building with SELinux support. if test "x$have_selinux" = xyes; then AC_DEFINE(HAVE_SELINUX, 1, [SELinux support]) # See if we have the libaudit library AC_CHECK_LIB(audit, audit_log_user_avc_message, have_libaudit=yes, have_libaudit=no) if test "x$have_libaudit" = xyes; then AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support]) fi AC_SUBST(have_libaudit) # See if we have the libcap library AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no) if test "x$have_libcap" = xyes; then AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support]) fi AC_SUBST(have_libcap) fi AC_SUBST(have_selinux) dnl check for the size of 'long double'. AC_CHECK_SIZEOF(long double, 0) sizeof_long_double=$ac_cv_sizeof_long_double AC_SUBST(sizeof_long_double) ### End of automated tests. ### Now run sysdeps configure fragments. # They also can set these variables. use_ldconfig=no ldd_rewrite_script=no libc_cv_sysconfdir=$sysconfdir libc_cv_gcc_unwind_find_fde=no libc_cv_idn=no # Iterate over all the sysdep directories we will use, running their # configure fragments, and looking for a uname implementation. uname= for dir in $sysnames; do case $dir in /*) dest=$dir ;; *) dest=$srcdir/$dir ;; esac if test -r $dest/configure; then AC_MSG_RESULT(running configure fragment for $dir) . $dest/configure fi [ if test -z "$uname"; then if test -r $dest/uname.c || test -r $dest/uname.S || { test -r $dest/syscalls.list && grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then uname=$dir fi fi ]dnl done if test x$libc_cv_gcc_unwind_find_fde = xyes; then AC_DEFINE(EXPORT_UNWIND_FIND_FDE) fi AC_SUBST(libc_cv_gcc_unwind_find_fde) # If we will use the generic uname implementation, we must figure out what # it will say by examining the system, and write the results in config-name.h. if test "$uname" = "sysdeps/generic"; then changequote(,)dnl uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'` changequote([,])dnl if test $uname_sysname != $config_os; then config_release=`echo $config_os | sed s/$uname_sysname//` fi dnl AC_DEFUN(LIBC_KERNEL_ID, [dnl if test -r /vmunix; then kernel_id=`strings /vmunix | grep UNIX` elif test -r /dynix; then kernel_id=`strings /dynix | grep DYNIX` else kernel_id= fi ])dnl AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl LIBC_KERNEL_ID changequote(,)dnl kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'` changequote([,])dnl if test x`echo "$config_release" | sed "s/^$kernel_release//"` \ != x$config_release; then # The configuration release is a substring of the kernel release. libc_cv_uname_release=$kernel_release elif test x$config_release != x; then libc_cv_uname_release=$config_release elif test x$kernel_release != x; then libc_cv_uname_release=$kernel_release else libc_cv_uname_release=unknown fi]) uname_release="$libc_cv_uname_release" AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl LIBC_KERNEL_ID changequote(,)dnl kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'` changequote([,])dnl if test -n "$kernel_version"; then libc_cv_uname_version="$kernel_version" else libc_cv_uname_version=unknown fi]) uname_version="$libc_cv_uname_version" AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl config_uname=config-name.h:config-name.in else # For non-generic uname, we don't need to create config-name.h at all. config_uname= fi dnl This is tested by existing code and it's simpler to avoid changing it. AC_DEFINE(USE_IN_LIBIO) # Test for old glibc 2.0.x headers so that they can be removed properly # Search only in includedir. AC_MSG_CHECKING(for old glibc 2.0.x headers) if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h" then old_glibc_headers=yes else old_glibc_headers=no fi AC_MSG_RESULT($old_glibc_headers) if test ${old_glibc_headers} = yes; then AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will) AC_MSG_WARN(*** be removed.) fi AC_SUBST(old_glibc_headers) AC_SUBST(libc_cv_slibdir) AC_SUBST(libc_cv_localedir) AC_SUBST(libc_cv_sysconfdir) AC_SUBST(libc_cv_rootsbindir) AC_SUBST(libc_cv_forced_unwind) dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests AC_SUBST(libc_cv_cpp_asm_debuginfo) AC_SUBST(libc_cv_cc_sse4) AC_SUBST(libc_cv_cc_avx) AC_SUBST(use_ldconfig) AC_SUBST(ldd_rewrite_script) AC_SUBST(elf) AC_SUBST(xcoff) if test $elf = yes; then AC_DEFINE(HAVE_ELF) fi if test $xcoff = yes; then AC_DEFINE(HAVE_XCOFF) fi AC_SUBST(static) AC_SUBST(shared) if test $shared = default; then shared=$elf fi AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default, [libc_cv_pic_default=yes cat > conftest.c <&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then libc_cv_pic_default=no fi rm -f conftest.*]) AC_SUBST(libc_cv_pic_default) AC_SUBST(profile) AC_SUBST(omitfp) AC_SUBST(bounded) AC_SUBST(static_nss) AC_SUBST(nopic_initfini) AC_SUBST(DEFINES) dnl See sysdeps/mach/configure.in for this variable. AC_SUBST(mach_interface_list) if test "`(cd $srcdir; pwd)`" = "`pwd`"; then config_makefile= else config_makefile=Makefile fi VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h` RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h` AC_SUBST(VERSION) AC_SUBST(RELEASE) AC_CONFIG_FILES([config.make ${config_makefile} ${config_uname}]) AC_CONFIG_COMMANDS([default],[[ case $CONFIG_FILES in *config.make*) echo "$config_vars" >> config.make;; esac test -d bits || mkdir bits]],[[config_vars='$config_vars']]) AC_OUTPUT