| dnl Process this file with autoconf to produce a configure script. |
| dnl Note we do not use AC_PREREQ here! See aclocal.m4 for what we use instead. |
| AC_INIT([GNU C Library], [(see version.h)], [http://sourceware.org/bugzilla/], [glibc]) |
| AC_CONFIG_SRCDIR([include/features.h]) |
| AC_CONFIG_HEADERS([config.h]) |
| AC_CONFIG_AUX_DIR([scripts]) |
| |
| ACX_PKGVERSION([GNU libc]) |
| ACX_BUGURL([http://www.gnu.org/software/libc/bugs.html]) |
| AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"], |
| [Package description]) |
| AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"], |
| [Bug reporting address]) |
| |
| # Glibc should not depend on any header files |
| AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS], |
| [m4_divert_text([DEFAULTS], |
| [ac_includes_default='/* none */'])]) |
| |
| # We require GCC, and by default use its preprocessor. Override AC_PROG_CPP |
| # here to work around the Autoconf issue discussed in |
| # <http://sourceware.org/ml/libc-alpha/2013-01/msg00721.html>. |
| AC_DEFUN([AC_PROG_CPP], |
| [AC_REQUIRE([AC_PROG_CC])dnl |
| AC_ARG_VAR([CPP], [C preprocessor])dnl |
| _AC_ARG_VAR_CPPFLAGS()dnl |
| # On Suns, sometimes $CPP names a directory. |
| if test -n "$CPP" && test -d "$CPP"; then |
| CPP= |
| fi |
| if test -z "$CPP"; then |
| CPP="$CC -E" |
| fi |
| AC_SUBST(CPP)dnl |
| ])# AC_PROG_CPP |
| |
| # We require GCC. Override _AC_PROG_CC_C89 here to work around the Autoconf |
| # issue discussed in |
| # <http://sourceware.org/ml/libc-alpha/2013-01/msg00757.html>. |
| AC_DEFUN([_AC_PROG_CC_C89], [[$1]]) |
| |
| 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 |
| AC_CHECK_TOOL(READELF, readelf, false) |
| |
| 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=$withval], |
| [path_binutils='']) |
| AC_ARG_WITH([selinux], |
| AC_HELP_STRING([--with-selinux], |
| [if building with SELinux support]), |
| [with_selinux=$withval], |
| [with_selinux=auto]) |
| |
| 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=$withval], |
| [sysheaders='']) |
| AC_SUBST(sysheaders) |
| |
| AC_SUBST(use_default_link) |
| AC_ARG_WITH([default-link], |
| AC_HELP_STRING([--with-default-link], |
| [do not use explicit linker scripts]), |
| [use_default_link=$withval], |
| [use_default_link=default]) |
| |
| 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=$enableval], |
| [enable_sanity=yes]) |
| |
| AC_ARG_ENABLE([shared], |
| AC_HELP_STRING([--enable-shared], |
| [build shared library @<:@default=yes if GNU ld@:>@]), |
| [shared=$enableval], |
| [shared=yes]) |
| AC_ARG_ENABLE([profile], |
| AC_HELP_STRING([--enable-profile], |
| [build profiled library @<:@default=no@:>@]), |
| [profile=$enableval], |
| [profile=no]) |
| |
| AC_ARG_ENABLE([oldest-abi], |
| AC_HELP_STRING([--enable-oldest-abi=ABI], |
| [configure the oldest ABI supported @<:@e.g. 2.2@:>@ @<:@default=glibc default@:>@]), |
| [oldest_abi=$enableval], |
| [oldest_abi=no]) |
| if test "$oldest_abi" = yes || test "$oldest_abi" = no; then |
| oldest_abi=default |
| else |
| AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi") |
| fi |
| AC_SUBST(oldest_abi) |
| |
| AC_ARG_ENABLE([hardcoded-path-in-tests], |
| AC_HELP_STRING([--enable-hardcoded-path-in-tests], |
| [hardcode newly built glibc path in tests @<:@default=no@:>@]), |
| [hardcoded_path_in_tests=$enableval], |
| [hardcoded_path_in_tests=no]) |
| AC_SUBST(hardcoded_path_in_tests) |
| |
| 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 |
| |
| AC_ARG_ENABLE([lock-elision], |
| AC_HELP_STRING([--enable-lock-elision[=yes/no]], |
| [Enable lock elision for pthread mutexes by default]), |
| [enable_lock_elision=$enableval], |
| [enable_lock_elision=no]) |
| if test "$enable_lock_elision" = yes ; then |
| AC_DEFINE(ENABLE_LOCK_ELISION) |
| 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]) |
| |
| 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=$enableval], |
| [force_install=yes]) |
| AC_SUBST(force_install) |
| |
| AC_ARG_ENABLE([maintainer-mode], |
| AC_HELP_STRING([--enable-maintainer-mode], |
| [enable make rules and dependencies not useful (and sometimes confusing) to the casual installer]), |
| [maintainer=$enableval], |
| [maintainer=no]) |
| |
| 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=default]) |
| |
| 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 $nss_includes" |
| AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; |
| #include <hasht.h> |
| #include <nsslowhash.h> |
| void f (void) { NSSLOW_Init (); }])], |
| libc_cv_nss_crypt=yes, |
| AC_MSG_ERROR([ |
| cannot find NSS headers with lowlevel hash function interfaces])) |
| old_LIBS="$LIBS" |
| LIBS="$LIBS -lfreebl3" |
| AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; |
| #include <hasht.h> |
| #include <nsslowhash.h>], |
| [NSSLOW_Init();])], |
| libc_cv_nss_crypt=yes, |
| AC_MSG_ERROR([ |
| cannot link program using lowlevel NSS hash functions])) |
| CFLAGS="$old_CFLAGS" |
| LIBS="$old_LIBS" |
| else |
| libc_cv_nss_crypt=no |
| fi |
| AC_SUBST(libc_cv_nss_crypt) |
| |
| |
| AC_ARG_ENABLE([obsolete-rpc], |
| AC_HELP_STRING([--enable-obsolete-rpc], |
| [build and install the obsolete RPC code for link-time usage]), |
| [link_obsolete_rpc=$enableval], |
| [link_obsolete_rpc=no]) |
| AC_SUBST(link_obsolete_rpc) |
| |
| if test "$link_obsolete_rpc" = yes; then |
| AC_DEFINE(LINK_OBSOLETE_RPC) |
| fi |
| |
| AC_ARG_ENABLE([systemtap], |
| [AS_HELP_STRING([--enable-systemtap], |
| [enable systemtap static probe points @<:@default=no@:>@])], |
| [systemtap=$enableval], |
| [systemtap=no]) |
| if test "x$systemtap" != xno; then |
| AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl |
| old_CFLAGS="$CFLAGS" |
| CFLAGS="-std=gnu99 $CFLAGS" |
| AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h> |
| void foo (int i, void *p) |
| { |
| asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) "" |
| :: STAP_PROBE_ASM_OPERANDS (2, i, p)); |
| }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no]) |
| CFLAGS="$old_CFLAGS"]) |
| if test $libc_cv_sdt = yes; then |
| AC_DEFINE([USE_STAP_PROBE]) |
| elif test "x$systemtap" != xauto; then |
| AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support]) |
| fi |
| fi |
| |
| AC_ARG_ENABLE([build-nscd], |
| [AS_HELP_STRING([--disable-build-nscd], |
| [disable building and installing the nscd daemon])], |
| [build_nscd=$enableval], |
| [build_nscd=default]) |
| AC_SUBST(build_nscd) |
| |
| # Note the use of $use_nscd is near the bottom of the file. |
| AC_ARG_ENABLE([nscd], |
| [AS_HELP_STRING([--disable-nscd], |
| [library functions will not contact the nscd daemon])], |
| [use_nscd=$enableval], |
| [use_nscd=yes]) |
| |
| AC_ARG_ENABLE([pt_chown], |
| [AS_HELP_STRING([--enable-pt_chown], |
| [Enable building and installing pt_chown])], |
| [build_pt_chown=$enableval], |
| [build_pt_chown=no]) |
| AC_SUBST(build_pt_chown) |
| if test "$build_pt_chown" = yes; then |
| AC_DEFINE(HAVE_PT_CHOWN) |
| fi |
| |
| # 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 $config_os | sed 's/^unknown-//'`" |
| |
| # Some configurations imply other options. |
| elf=yes |
| |
| # The configure fragment of an add-on port can modify these to supplement |
| # or override the table in the case statement below. No fragment should |
| # ever change the config_* variables, however. |
| machine=$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="$withval" ;; |
| esac |
| ]) |
| |
| dnl Let sysdeps/*/preconfigure act here, like they can in add-ons. |
| LIBC_PRECONFIGURE([$srcdir], [for sysdeps]) |
| |
| # 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 "$libc_add_on"; then |
| LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for]) |
| use_add_ons="$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-$host_os" in |
| *-linux* | *-gnu*) |
| ;; |
| *) |
| echo "*** The GNU C library is currently not available for this platform." |
| echo "*** So far nobody cared to port it and if there is no volunteer it" |
| echo "*** might never happen. So, if you have interest to see glibc on" |
| echo "*** this platform visit" |
| echo "*** http://www.gnu.org/software/libc/porting.html" |
| echo "*** and join the group of porters" |
| exit 1 |
| ;; |
| esac |
| fi |
| |
| dnl We need to use [ and ] for other purposes for a while now. |
| changequote(,)dnl |
| # Expand the configuration machine name into a subdirectory by architecture |
| # type and particular chip. If an add-on configure fragment already set |
| # base_machine, we don't change it. |
| test -n "$base_machine" || case "$machine" in |
| i[4567]86) base_machine=i386 machine=i386/$machine ;; |
| powerpc64*) base_machine=powerpc machine=powerpc/powerpc64 ;; |
| powerpc*) base_machine=powerpc machine=powerpc/powerpc32 ;; |
| 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 |
| |
| # For the multi-arch option we need support in the assembler & linker. |
| AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support], |
| libc_cv_ld_gnu_indirect_function, [dnl |
| cat > conftest.S <<EOF |
| .type foo,%gnu_indirect_function |
| foo: |
| .globl _start |
| _start: |
| .globl __start |
| __start: |
| .data |
| #ifdef _LP64 |
| .quad foo |
| #else |
| .long foo |
| #endif |
| EOF |
| libc_cv_ld_gnu_indirect_function=no |
| if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ |
| -nostartfiles -nostdlib \ |
| -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
| # Do a link to see if the backend supports IFUNC relocs. |
| $READELF -r conftest 1>&AS_MESSAGE_LOG_FD |
| LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || { |
| libc_cv_ld_gnu_indirect_function=yes |
| } |
| fi |
| rm -f conftest*]) |
| |
| AC_MSG_CHECKING(whether .text pseudo-op must be used) |
| AC_CACHE_VAL(libc_cv_dot_text, [dnl |
| cat > conftest.s <<EOF |
| .text |
| EOF |
| libc_cv_dot_text= |
| if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then |
| libc_cv_dot_text=.text |
| fi |
| rm -f conftest*]) |
| if test -z "$libc_cv_dot_text"; then |
| AC_MSG_RESULT(no) |
| else |
| AC_MSG_RESULT(yes) |
| fi |
| |
| if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then |
| if test x"$multi_arch" = xyes; then |
| AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support]) |
| else |
| multi_arch=no |
| fi |
| fi |
| multi_arch_d= |
| if test x"$multi_arch" != xno; then |
| multi_arch_d=/multiarch |
| fi |
| |
| # Compute the list of sysdep directories for this configuration. |
| # This can take a while to compute. |
| sysdep_dir=$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 ;; |
| linux*) |
| base_os=unix/sysv ;; |
| 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 |
| maybe_fpu=/fpu |
| else |
| maybe_fpu=/nofpu |
| fi |
| # For each machine term, try it with and then without /multiarch. |
| for try_fpu in $maybe_fpu ''; do |
| for try_multi in $multi_arch_d ''; do |
| mach="$mach /$1$try_fpu$try_multi" |
| done |
| done |
| 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 $mach ''; do |
| for d in $add_ons_pfx ''; do |
| for a in $add_ons_sfx ''; do |
| try_suffix="$m0$b$v$o$m" |
| if test -n "$try_suffix"; then |
| try_srcdir="${srcdir}/" |
| case "$d" in |
| /*) try_srcdir= ;; |
| esac |
| try="${d}sysdeps$try_suffix$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 the assembler supports gnu_indirect_function symbol type and the |
| # architecture supports multi-arch, we enable multi-arch by default. |
| case $sysnames_add_ons$sysnames in |
| *"$multi_arch_d"*) |
| ;; |
| *) |
| test x"$multi_arch" = xdefault && multi_arch=no |
| ;; |
| esac |
| if test x"$multi_arch" != xno; then |
| AC_DEFINE(USE_MULTIARCH) |
| fi |
| AC_SUBST(multi_arch) |
| |
| if test -z "$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. |
| |
| # 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 |
| |
| for implies_file in Implies Implies-before Implies-after; do |
| implies_type=`echo $implies_file | sed s/-/_/` |
| eval ${implies_type}= |
| if test -f $xsrcdir$name/$implies_file; then |
| # Collect more names from the `Implies' file (removing comments). |
| implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`" |
| for x in $implied_candidate; do |
| found=no |
| if test -d $xsrcdir$name_base/$x; then |
| eval "${implies_type}=\"\$${implies_type} \$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 $implies_file $x try($d) {$try_srcdir}$try" >&2 |
| if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try; |
| then |
| eval "${implies_type}=\"\$${implies_type} \$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_file specifies nonexistent $x) |
| fi |
| done |
| fi |
| done |
| |
| # Add NAME to the list of names. |
| names="$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$/q' -e p`" |
| changequote([,])dnl |
| |
| test -n "$enable_debug_configure" && |
| echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \ |
| Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2 |
| |
| # 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 $Implies $* $Implies_before $parent $Implies_after`" |
| test -n "$sysnames" && set $sysnames |
| done |
| |
| # Add the default directories. |
| default_sysnames="sysdeps/generic" |
| sysnames="$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 |
| |
| # Accept binutils 2.20 or newer. |
| AC_CHECK_PROG_VER(AS, $AS, --version, |
| [GNU assembler.* \([0-9]*\.[0-9.]*\)], |
| [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as") |
| AC_CHECK_PROG_VER(LD, $LD, --version, |
| [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)], |
| [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld") |
| |
| # These programs are version sensitive. |
| AC_CHECK_TOOL_PREFIX |
| AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v, |
| [version \([egcygnustpi-]*[0-9.]*\)], [4.[4-9].* | 4.[1-9][0-9].* | [5-9].* ], |
| 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]* | [4-9].* | [1-9][0-9]*], 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.[5-9]*|4.[1-9][0-9]*|[5-9].*], |
| MAKEINFO=: aux_missing="$aux_missing makeinfo") |
| AC_CHECK_PROG_VER(SED, sed, --version, |
| [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)], |
| [3.0[2-9]*|3.[1-9]*|[4-9]*], |
| SED=: aux_missing="$aux_missing sed") |
| AC_CHECK_PROG_VER(AWK, gawk, --version, |
| [GNU Awk[^0-9]*\([0-9][0-9.]*\)], |
| [3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk") |
| |
| AC_CHECK_TOOL(NM, nm, false) |
| |
| if test "x$maintainer" = "xyes"; then |
| 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.ac > /dev/null 2>&1); then |
| libc_cv_autoconf_works=yes |
| else |
| libc_cv_autoconf_works=no |
| fi]) |
| test $libc_cv_autoconf_works = yes || AUTOCONF=no |
| ;; |
| esac |
| if test "x$AUTOCONF" = xno; then |
| aux_missing="$aux_missing autoconf" |
| fi |
| else |
| AUTOCONF=no |
| fi |
| |
| test -n "$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 |
| CXX_SYSINCLUDES= |
| for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \ |
| | sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do |
| test "x$cxxheaders" != x && |
| CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders" |
| done |
| fi |
| fi |
| AC_SUBST(SYSINCLUDES) |
| AC_SUBST(CXX_SYSINCLUDES) |
| |
| # Test if LD_LIBRARY_PATH contains the notation for the current directory |
| # since this would lead to problems installing/building glibc. |
| # LD_LIBRARY_PATH contains the current directory if one of the following |
| # is true: |
| # - one of the terminals (":" and ";") is the first or last sign |
| # - two terminals occur directly after each other |
| # - the path contains an element with a dot in it |
| AC_MSG_CHECKING(LD_LIBRARY_PATH variable) |
| changequote(,)dnl |
| case ${LD_LIBRARY_PATH} in |
| [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* ) |
| ld_library_path_setting="contains current directory" |
| ;; |
| *) |
| ld_library_path_setting="ok" |
| ;; |
| esac |
| changequote([,])dnl |
| AC_MSG_RESULT($ld_library_path_setting) |
| if test "$ld_library_path_setting" != "ok"; then |
| AC_MSG_ERROR([ |
| *** LD_LIBRARY_PATH shouldn't contain the current directory when |
| *** building glibc. Please change the environment variable |
| *** and run configure again.]) |
| fi |
| |
| AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl |
| if $CC -v -static-libgcc 2>&1 | grep 'unrecognized option.*static-libgcc' >/dev/null; then |
| libc_cv_gcc_static_libgcc= |
| else |
| libc_cv_gcc_static_libgcc=-static-libgcc |
| fi]) |
| AC_SUBST(libc_cv_gcc_static_libgcc) |
| |
| AC_PATH_PROG(BASH_SHELL, bash, no) |
| if test "$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_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 libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl |
| AC_TRY_COMPILE(dnl |
| [#define __need_size_t |
| #define __need_wchar_t |
| #include <stddef.h> |
| #define __need_NULL |
| #include <stddef.h>], [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 <stddef.h> 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 <<EOF |
| #include "confdefs.h" |
| /* Nothing whatsoever. */ |
| EOF |
| if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&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_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl |
| cat > conftest.s <<EOF |
| ${libc_cv_dot_text} |
| foo: |
| .set glibc_conftest_frobozz,foo |
| .globl glibc_conftest_frobozz |
| EOF |
| # The alpha-dec-osf1 assembler gives only a warning for `.set' |
| # (but it doesn't work), so we must do a linking check to be sure. |
| cat > 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 gnu_unique_object symbol type, |
| libc_cv_asm_unique_object, [dnl |
| cat > conftest.s <<EOF |
| ${libc_cv_dot_text} |
| _sym: |
| .type _sym, %gnu_unique_object |
| EOF |
| if ${CC-cc} -c $ASFLAGS conftest.s 1>&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 $libc_cv_asm_unique_object = yes; then |
| AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT) |
| fi |
| |
| AC_CACHE_CHECK(for .previous assembler directive, |
| libc_cv_asm_previous_directive, [dnl |
| cat > conftest.s <<EOF |
| .section foo_section |
| .previous |
| EOF |
| if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then |
| libc_cv_asm_previous_directive=yes |
| else |
| libc_cv_asm_previous_directive=no |
| fi |
| rm -f conftest*]) |
| if test $libc_cv_asm_previous_directive = yes; then |
| AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE) |
| else |
| AC_CACHE_CHECK(for .popsection assembler directive, |
| libc_cv_asm_popsection_directive, [dnl |
| cat > conftest.s <<EOF |
| .pushsection foo_section |
| .popsection |
| EOF |
| if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then |
| libc_cv_asm_popsection_directive=yes |
| else |
| libc_cv_asm_popsection_directive=no |
| fi |
| rm -f conftest*]) |
| if test $libc_cv_asm_popsection_directive = yes; then |
| AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE) |
| fi |
| fi |
| AC_CACHE_CHECK(for .protected and .hidden assembler directive, |
| libc_cv_asm_protected_directive, [dnl |
| cat > conftest.s <<EOF |
| .protected foo |
| foo: |
| .hidden bar |
| bar: |
| EOF |
| if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&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 $libc_cv_asm_protected_directive = yes; then |
| AC_CACHE_CHECK(whether __attribute__((visibility())) is supported, |
| libc_cv_visibility_attribute, |
| [cat > conftest.c <<EOF |
| int foo __attribute__ ((visibility ("hidden"))) = 1; |
| int bar __attribute__ ((visibility ("protected"))) = 1; |
| EOF |
| libc_cv_visibility_attribute=no |
| if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&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.{c,s} |
| ]) |
| if test $libc_cv_visibility_attribute != yes; then |
| AC_MSG_ERROR(compiler support for visibility attribute is required) |
| fi |
| fi |
| |
| if test $libc_cv_visibility_attribute = yes; then |
| AC_CACHE_CHECK(for broken __attribute__((visibility())), |
| libc_cv_broken_visibility_attribute, |
| [cat > conftest.c <<EOF |
| int foo (int x); |
| int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden"))); |
| int bar (int x) { return x; } |
| EOF |
| libc_cv_broken_visibility_attribute=yes |
| if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&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 $libc_cv_broken_visibility_attribute = yes; then |
| AC_MSG_ERROR(working compiler support for visibility attribute is required) |
| fi |
| fi |
| |
| AC_CACHE_CHECK(for broken __attribute__((alias())), |
| libc_cv_broken_alias_attribute, |
| [cat > conftest.c <<EOF |
| extern int foo (int x) __asm ("xyzzy"); |
| int bar (int x) { return x; } |
| extern __typeof (bar) foo __attribute ((weak, alias ("bar"))); |
| extern int dfoo; |
| extern __typeof (dfoo) dfoo __asm ("abccb"); |
| int dfoo = 1; |
| EOF |
| libc_cv_broken_alias_attribute=yes |
| if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&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 |
| LIBC_TRY_LINK_STATIC([ |
| int foo (void) { return 1; } |
| int (*fp) (void) __attribute__ ((section (".init_array"))) = foo; |
| ], |
| [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then |
| libc_cv_initfini_array=yes |
| else |
| libc_cv_initfini_array=no |
| fi], |
| [libc_cv_initfini_array=no]) |
| ]) |
| if test $libc_cv_initfini_array != yes; then |
| AC_MSG_ERROR([Need linker with .init_array/.fini_array support.]) |
| fi |
| |
| AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer, |
| libc_cv_ctors_header, [dnl |
| libc_cv_ctors_header=yes |
| LIBC_TRY_LINK_STATIC([ |
| __attribute__ ((constructor)) void ctor (void) { asm (""); } |
| __attribute__ ((destructor)) void dtor (void) { asm (""); } |
| ], |
| [dnl |
| AS_IF([$READELF -WS conftest$ac_exeext | $AWK ' |
| { gsub(/\@<:@ */, "@<:@") } |
| $2 == ".ctors" || $2 == ".dtors" { |
| size = strtonum("0x" $6) |
| align = strtonum("0x" $NF) |
| seen@<:@$2@:>@ = 1 |
| stub@<:@$2@:>@ = size == align * 2 |
| } |
| END { |
| ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@ |
| dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@ |
| exit ((ctors_ok && dtors_ok) ? 0 : 1) |
| } |
| '], [libc_cv_ctors_header=no]) |
| ], [dnl |
| AC_MSG_ERROR([missing __attribute__ ((constructor)) support??]) |
| ]) |
| ]) |
| if test $libc_cv_ctors_header = no; then |
| AC_DEFINE(NO_CTORS_DTORS_SECTIONS) |
| fi |
| |
| AC_CACHE_CHECK(for libunwind-support in compiler, |
| libc_cv_cc_with_libunwind, [ |
| cat > conftest.c <<EOF |
| int main (void) { return 0; } |
| EOF |
| if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \ |
| conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; 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 $libc_cv_cc_with_libunwind = yes; then |
| AC_DEFINE(HAVE_CC_WITH_LIBUNWIND) |
| fi |
| |
| LIBC_LINKER_FEATURE([-z nodelete], [-Wl,--enable-new-dtags,-z,nodelete], |
| [libc_cv_z_nodelete=yes], |
| [AC_MSG_ERROR(linker with -z nodelete support required)]) |
| |
| LIBC_LINKER_FEATURE([-z nodlopen], [-Wl,--enable-new-dtags,-z,nodlopen], |
| [libc_cv_z_nodlopen=yes], |
| [AC_MSG_ERROR(linker with -z nodlopen support required)]) |
| |
| LIBC_LINKER_FEATURE([-z initfirst], [-Wl,--enable-new-dtags,-z,initfirst], |
| [libc_cv_z_initfirst=yes], |
| [AC_MSG_ERROR(linker with -z initfirst support required)]) |
| |
| # Add-on fragments can set these for other machines. |
| libc_commonpagesize=${libc_commonpagesize:-no} |
| libc_relro_required=${libc_relro_required:-no} |
| case "$base_machine" in |
| i[[34567]]86 | x86_64 | powerpc* | s390*) |
| libc_commonpagesize=0x1000 |
| libc_relro_required=yes |
| ;; |
| sparc*) |
| libc_commonpagesize=0x2000 |
| libc_relro_required=yes |
| ;; |
| esac |
| |
| if test $libc_commonpagesize != no; then |
| AC_CACHE_CHECK(for -z relro option, |
| libc_cv_z_relro, [dnl |
| libc_cv_z_relro=no |
| AC_LANG_CONFTEST([AC_LANG_SOURCE([[ |
| int _start (void) { return 42; } |
| extern void _exit (int); |
| /* Since these pointers are const, they should go in rodata. |
| Since they refer to functions that have to be resolved by |
| dynamic linking, they should instead go in RELRO data. */ |
| const void *const relro[] = { &_start, &_exit, 0 }; |
| /* GNU ld fails to produce RELRO data when it's very small and there is no |
| normal writable data following it, or if only uninitialized (.bss) data |
| follows it, or only very small writable data. */ |
| int data[0x10000] = { 1, }; |
| ]])]) |
| cat > conftest.awk <<\EOF |
| BEGIN { |
| result = "no" |
| commonpagesize = strtonum(commonpagesize) |
| } |
| { print "LINE:", $0 > "/dev/stderr" } |
| $1 == "GNU_RELRO" { |
| vaddr = strtonum($3) |
| memsz = strtonum($6) |
| end = vaddr + memsz |
| printf "vaddr %#x memsz %#x end %#x commonpagesize %#x\n", \ |
| vaddr, memsz, end, commonpagesize > "/dev/stderr" |
| result = (end % commonpagesize == 0) ? "yes" : "broken" |
| } |
| END { print result } |
| EOF |
| AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
| -fPIC -shared -o conftest.so conftest.c |
| -nostartfiles -nostdlib |
| -Wl,-z,relro 1>&AS_MESSAGE_LOG_FD]) && |
| AC_TRY_COMMAND([$READELF -Wl conftest.so > conftest.ph]) && |
| AC_TRY_COMMAND([ |
| $AWK -v commonpagesize=$libc_commonpagesize -f conftest.awk |
| conftest.ph > conftest.cps |
| ]) && |
| libc_cv_z_relro=`cat conftest.cps 2>&AS_MESSAGE_LOG_FD` |
| rm -f conftest*]) |
| if { test "x$libc_relro_required" = xyes && |
| test "x$libc_cv_z_relro" != xyes |
| } |
| then |
| AC_MSG_ERROR(linker with -z relro support required) |
| fi |
| else |
| AC_MSG_WARN([missing architecture parameter to check for working -z relro]) |
| fi |
| |
| AC_CACHE_CHECK(for -Bgroup option, |
| libc_cv_Bgroup, [dnl |
| cat > conftest.c <<EOF |
| int _start (void) { return 42; } |
| EOF |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
| -fPIC -shared -o conftest.so conftest.c |
| -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD]) |
| then |
| libc_cv_Bgroup=yes |
| else |
| libc_cv_Bgroup=no |
| fi |
| rm -f conftest*]) |
| AC_SUBST(libc_cv_Bgroup) |
| |
| ASFLAGS_config= |
| AC_CACHE_CHECK(whether --noexecstack is desirable for .S files, |
| libc_cv_as_noexecstack, [dnl |
| cat > conftest.c <<EOF |
| void foo (void) { } |
| EOF |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS |
| -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \ |
| && grep .note.GNU-stack conftest.s >/dev/null \ |
| && AC_TRY_COMMAND([${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 <<EOF |
| extern int bar (int); |
| extern int mumble; |
| int foo (void) { return bar (mumble); } |
| EOF |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
| -fPIC -shared -o conftest.so conftest.c |
| -nostdlib -nostartfiles |
| -Wl,-z,combreloc 1>&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 "$libc_cv_z_combreloc" = yes; then |
| AC_DEFINE(HAVE_Z_COMBRELOC) |
| fi |
| AC_SUBST(libc_cv_z_combreloc) |
| |
| LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack], |
| [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no]) |
| AC_SUBST(libc_cv_z_execstack) |
| |
| AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl |
| LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no]) |
| ]) |
| |
| AC_SUBST(libc_cv_fpie) |
| |
| AC_CACHE_CHECK(for --hash-style option, |
| libc_cv_hashstyle, [dnl |
| cat > conftest.c <<EOF |
| int _start (void) { return 42; } |
| EOF |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
| -fPIC -shared -o conftest.so conftest.c |
| -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD]) |
| then |
| libc_cv_hashstyle=yes |
| else |
| libc_cv_hashstyle=no |
| fi |
| rm -f conftest*]) |
| AC_SUBST(libc_cv_hashstyle) |
| |
| # The linker's default -shared behavior is good enough if it |
| # does these things that our custom linker scripts ensure that |
| # all allocated NOTE sections come first. |
| if test "$use_default_link" = default; then |
| AC_CACHE_CHECK([for sufficient default -shared layout], |
| libc_cv_use_default_link, [dnl |
| libc_cv_use_default_link=no |
| cat > conftest.s <<\EOF |
| .section .note.a,"a",%note |
| .balign 4 |
| .long 4,4,9 |
| .string "GNU" |
| .string "foo" |
| .section .note.b,"a",%note |
| .balign 4 |
| .long 4,4,9 |
| .string "GNU" |
| .string "bar" |
| EOF |
| if AC_TRY_COMMAND([dnl |
| ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) && |
| ac_try=`$READELF -S conftest.so | sed -n \ |
| ['${x;p;} |
| s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/ |
| t a |
| b |
| : a |
| H']` |
| then |
| libc_seen_a=no libc_seen_b=no |
| set -- $ac_try |
| while test $# -ge 2 -a "$1" = NOTE; do |
| case "$2" in |
| .note.a) libc_seen_a=yes ;; |
| .note.b) libc_seen_b=yes ;; |
| esac |
| shift 2 |
| done |
| case "$libc_seen_a$libc_seen_b" in |
| yesyes) |
| libc_cv_use_default_link=yes |
| ;; |
| *) |
| echo >&AS_MESSAGE_LOG_FD "\ |
| $libc_seen_a$libc_seen_b from: |
| $ac_try" |
| ;; |
| esac |
| fi |
| rm -f conftest*]) |
| use_default_link=$libc_cv_use_default_link |
| fi |
| |
| AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl |
| if libc_cv_output_format=` |
| ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD` |
| then |
| : |
| else |
| libc_cv_output_format= |
| fi |
| test -n "$libc_cv_output_format" || libc_cv_output_format=unknown]) |
| AC_SUBST(libc_cv_output_format) |
| |
| AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl |
| cat > conftest.c <<EOF |
| int foo; |
| EOF |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors |
| conftest.c 1>&AS_MESSAGE_LOG_FD]) |
| then |
| libc_cv_fno_toplevel_reorder=yes |
| else |
| libc_cv_fno_toplevel_reorder=no |
| fi |
| rm -f conftest*]) |
| if test $libc_cv_fno_toplevel_reorder = yes; then |
| fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors" |
| else |
| fno_unit_at_a_time=-fno-unit-at-a-time |
| fi |
| AC_SUBST(fno_unit_at_a_time) |
| |
| AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl |
| LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector], |
| [libc_cv_ssp=yes], |
| [libc_cv_ssp=no]) |
| ]) |
| AC_SUBST(libc_cv_ssp) |
| |
| AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl |
| cat > conftest.c <<EOF |
| int foo; |
| #ifdef __GNUC_GNU_INLINE__ |
| main () { return 0;} |
| #else |
| #error |
| #endif |
| EOF |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline |
| -o conftest.s conftest.c 1>&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 |
| gnu89_inline=-fgnu89-inline |
| else |
| gnu89_inline= |
| fi |
| AC_SUBST(gnu89_inline) |
| |
| AC_CACHE_CHECK(whether cc puts quotes around section names, |
| libc_cv_have_section_quotes, |
| [cat > conftest.c <<EOF |
| static const int foo |
| __attribute__ ((section ("bar"))) = 1; |
| EOF |
| if ${CC-cc} -S conftest.c -o conftest.s; then |
| if grep '\.section.*"bar"' conftest.s >/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.{c,s} |
| ]) |
| if test $libc_cv_have_section_quotes = yes; then |
| AC_DEFINE(HAVE_SECTION_QUOTES) |
| fi |
| |
| AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive, |
| [dnl |
| cat > conftest.s <<EOF |
| ${libc_cv_dot_text} |
| .globl foo |
| foo: |
| .weak foo |
| .weak bar; bar = foo |
| EOF |
| if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&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 <<EOF |
| ${libc_cv_dot_text} |
| .globl foo |
| foo: |
| .weakext bar foo |
| .weakext baz |
| .globl baz |
| baz: |
| EOF |
| if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&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 <<EOF |
| .text |
| .type func,%function |
| func: |
| .cfi_startproc |
| .cfi_remember_state |
| .cfi_rel_offset 1, $cfi_offset |
| .cfi_endproc |
| EOF |
| if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&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 $libc_cv_ld_no_whole_archive = no; then |
| AC_MSG_ERROR([support for --no-whole-archive is needed]) |
| fi |
| |
| AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl |
| cat > conftest.c <<\EOF |
| _start () {} |
| int __eh_pc; |
| __throw () {} |
| EOF |
| dnl No \ in command here because it ends up inside ''. |
| if AC_TRY_COMMAND([${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 "$libc_cv_c_asmcr0_bug" != 'no'; then |
| AC_DEFINE(BROKEN_PPC_ASM_CR0) |
| fi |
| fi |
| |
| AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl |
| cat > conftest.c <<\EOF |
| void zero (void *x) |
| { |
| __builtin_memset (x, 0, 1000); |
| } |
| EOF |
| dnl |
| if AC_TRY_COMMAND([${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 "$libc_cv_gcc_builtin_redirection" = no; then |
| AC_MSG_ERROR([support for the symbol redirection needed]) |
| fi |
| |
| dnl Check whether the compiler supports the __thread keyword. |
| AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread, |
| [cat > conftest.c <<\EOF |
| __thread int a = 42; |
| EOF |
| if AC_TRY_COMMAND([${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" = no; then |
| AC_MSG_ERROR([support for the __thread keyword is required]) |
| fi |
| |
| 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" = no; then |
| AC_MSG_ERROR([support for the tls_model attribute is required]) |
| fi |
| |
| dnl Determine how to disable generation of FMA instructions. |
| AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions], |
| libc_cv_cc_nofma, [dnl |
| libc_cv_cc_nofma= |
| for opt in -ffp-contract=off -mno-fused-madd; do |
| LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break]) |
| done]) |
| AC_SUBST(libc_cv_cc_nofma) |
| |
| 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=$submachine"; do |
| LIBC_TRY_CC_OPTION([$opt], [ |
| libc_cv_cc_submachine="$opt" |
| break], []) |
| done]) |
| if test "x$libc_cv_cc_submachine" = xno; then |
| AC_MSG_ERROR([${CC-cc} does not support $submachine]) |
| fi |
| fi |
| AC_SUBST(libc_cv_cc_submachine) |
| |
| AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ |
| __attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl |
| cat > conftest.c <<EOF |
| void |
| __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) |
| foo (void) {} |
| EOF |
| libc_cv_cc_loop_to_function=no |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) |
| then |
| libc_cv_cc_loop_to_function=yes |
| fi |
| rm -f conftest*]) |
| if test $libc_cv_cc_loop_to_function = yes; then |
| AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL) |
| fi |
| AC_SUBST(libc_cv_cc_loop_to_function) |
| |
| dnl Check whether we have the gd library available. |
| AC_MSG_CHECKING(for libgd) |
| if test "$with_gd" != "no"; then |
| old_CFLAGS="$CFLAGS" |
| CFLAGS="$CFLAGS $libgd_include" |
| old_LDFLAGS="$LDFLAGS" |
| LDFLAGS="$LDFLAGS $libgd_ldflags" |
| old_LIBS="$LIBS" |
| LIBS="$LIBS -lgd -lpng -lz -lm" |
| AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no) |
| CFLAGS="$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$have_selinux = xyes ; then |
| AC_MSG_CHECKING([for NSCD Flask permissions in selinux/av_permissions.h]) |
| AC_TRY_COMPILE([#include <selinux/av_permissions.h>], |
| [#ifdef NSCD__SHMEMHOST |
| return 0; |
| #else |
| #error NSCD__SHMEMHOST not defined |
| #endif], |
| have_selinux=yes, have_selinux=no) |
| AC_MSG_RESULT($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) |
| |
| CPPUNDEFS= |
| dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE. |
| dnl Since we are building the implementations of the fortified functions here, |
| dnl having the macro defined interacts very badly. |
| AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source, |
| [AC_TRY_COMPILE([], [ |
| #ifdef _FORTIFY_SOURCE |
| # error bogon |
| #endif], |
| [libc_cv_predef_fortify_source=no], |
| [libc_cv_predef_fortify_source=yes])]) |
| if test $libc_cv_predef_fortify_source = yes; then |
| CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE" |
| fi |
| AC_SUBST(CPPUNDEFS) |
| |
| dnl Check for silly hacked compilers inserting -fstack-protector. |
| dnl This breaks badly for the early startup code we compile, since |
| dnl the compiled code can refer to a magic machine-dependent location |
| dnl for the canary value before we have sufficient setup for that to |
| dnl work. It's also questionable to build all of libc with this flag |
| dnl even when you're doing that for most applications you build, since |
| dnl libc's code is so heavily-used and performance-sensitive. If we |
| dnl ever really want to make that work, it should be enabled explicitly |
| dnl in the libc build, not inherited from implicit compiler settings. |
| AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector], |
| libc_cv_predef_stack_protector, [ |
| AC_TRY_COMPILE([extern void foobar (char *);], |
| [char large_array[2048]; foobar (large_array);], [ |
| libc_undefs=`$NM -u conftest.o | |
| LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ |
| 2>&AS_MESSAGE_LOG_FD` || { |
| AC_MSG_ERROR([confusing output from $NM -u]) |
| } |
| echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" |
| # On some architectures, there are architecture-specific undefined |
| # symbols (resolved by the linker), so filter out unknown symbols. |
| # This will fail to produce the correct result if the compiler |
| # defaults to -fstack-protector but this produces an undefined symbol |
| # other than __stack_chk_fail. However, compilers like that have not |
| # been encountered in practice. |
| libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'` |
| case "$libc_undefs" in |
| foobar) libc_cv_predef_stack_protector=no ;; |
| '__stack_chk_fail |
| foobar') libc_cv_predef_stack_protector=yes ;; |
| *) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;; |
| esac], |
| [AC_MSG_ERROR([test compilation failed])]) |
| ]) |
| libc_extra_cflags= |
| if test $libc_cv_predef_stack_protector = yes; then |
| libc_extra_cflags=-fno-stack-protector |
| fi |
| AC_SUBST(libc_extra_cflags) |
| |
| ### End of automated tests. |
| ### Now run sysdeps configure fragments. |
| |
| # They also can set these variables. |
| use_ldconfig=no |
| ldd_rewrite_script=no |
| libc_cv_sysconfdir=$sysconfdir |
| libc_cv_localstatedir=$localstatedir |
| libc_cv_gcc_unwind_find_fde=no |
| libc_cv_idn=no |
| |
| # Iterate over all the sysdep directories we will use, running their |
| # configure fragments. |
| 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) |
| . $dest/configure |
| fi |
| done |
| |
| if test x$libc_cv_gcc_unwind_find_fde = xyes; then |
| AC_DEFINE(EXPORT_UNWIND_FIND_FDE) |
| fi |
| AC_SUBST(libc_cv_gcc_unwind_find_fde) |
| |
| # A sysdeps configure fragment can reset this if IFUNC is not actually |
| # usable even though the assembler knows how to generate the symbol type. |
| if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then |
| AC_DEFINE(HAVE_IFUNC) |
| fi |
| |
| # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps |
| # configure fragment can override the value to prevent this AC_DEFINE. |
| AC_SUBST(use_nscd) |
| if test "x$use_nscd" != xno; then |
| AC_DEFINE([USE_NSCD]) |
| fi |
| if test "x$build_nscd" = xdefault; then |
| build_nscd=$use_nscd |
| fi |
| |
| # 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 ${old_glibc_headers} = yes; then |
| AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will) |
| AC_MSG_WARN(*** be removed.) |
| fi |
| AC_SUBST(old_glibc_headers) |
| |
| AC_SUBST(libc_cv_slibdir) |
| AC_SUBST(libc_cv_rtlddir) |
| AC_SUBST(libc_cv_localedir) |
| AC_SUBST(libc_cv_sysconfdir) |
| AC_SUBST(libc_cv_localstatedir) |
| AC_SUBST(libc_cv_rootsbindir) |
| AC_SUBST(libc_cv_forced_unwind) |
| |
| if test x$use_ldconfig = xyes; then |
| AC_DEFINE(USE_LDCONFIG) |
| fi |
| AC_SUBST(use_ldconfig) |
| AC_SUBST(ldd_rewrite_script) |
| |
| AC_SUBST(static) |
| AC_SUBST(shared) |
| |
| AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default, |
| [libc_cv_pic_default=yes |
| cat > conftest.c <<EOF |
| #if defined __PIC__ || defined __pic__ || defined PIC || defined pic |
| # error PIC is default. |
| #endif |
| EOF |
| if eval "${CC-cc} -S conftest.c 2>&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(static_nss) |
| |
| AC_SUBST(DEFINES) |
| |
| dnl See sysdeps/mach/configure.ac for this variable. |
| AC_SUBST(mach_interface_list) |
| |
| 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 Makefile]) |
| 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 |