Dnl Process this file with autoconf to produce a configure script. AC_REVISION([$CVSid$]) AC_PREREQ(2.11)dnl dnl Minimum Autoconf version required. AC_INIT(features.h) AC_CONFIG_HEADER(config.h) # This will get text that should go into config.make. config_vars= # Check for a --with-gmp argument and set gmp-srcdir in config.make. AC_ARG_WITH(gmp, dnl --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed), [dnl case "$with_gmp" in yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;; ''|no) ;; *) config_vars="$config_vars gmp-srcdir = $withval" ;; esac ]) # Check for a --with-gettext argument and set gettext-srcdir in config.make. AC_ARG_WITH(gettext, dnl --with-gettext=DIR find GNU gettext source code in DIR (not needed), [dnl case "$with_gettext" in yes) AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;; ''|no) ;; *) config_vars="$config_vars gettext-srcdir = $withval" ;; esac ]) dnl Arguments to specify presence of other packages/features. AC_ARG_WITH(fp, dnl [ --with-fp if using floating-point hardware [default=yes]], with_fp=$withval, with_fp=yes) AC_ARG_WITH(gnu-binutils, dnl --with-gnu-binutils if using GNU binutils (as and ld), gnu_binutils=$withval, gnu_binutils=no) AC_ARG_WITH(gnu-ld, dnl --with-gnu-ld if using GNU ld (in the binutils package), gnu_ld=$withval, gnu_ld=no) AC_ARG_WITH(gnu-as, dnl --with-gnu-as if using GNU as (in the binutils package), gnu_as=$withval, gnu_as=no) test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes AC_ARG_WITH(elf, dnl --with-elf if using the ELF object format, elf=$withval, elf=no) AC_ARG_ENABLE(libio, dnl [ --enable-libio build in GNU libio instead of GNU stdio], [if test $enableval = yes; then stdio=libio else stdio=stdio fi], stdio=default) AC_ARG_ENABLE(new-malloc, dnl [ --enable-new-malloc use the new malloc implementation. This is the default for Linux, others use the old malloc.], [if test $enableval = yes; then malloc=new-malloc else malloc=malloc fi], malloc=default) AC_ARG_ENABLE(sanity-checks, dnl [ --disable-sanity-checks really do not use threads (should not be used except in special situations) [default=yes]], enable_sanity=$enableval, enable_sanity=yes) dnl Arguments to enable or disable building the shared, profiled, and dnl -fomit-frame-pointer libraries. AC_ARG_ENABLE(shared, dnl [ --enable-shared build shared library [default=yes if GNU ld & ELF]], shared=$enableval, shared=default) AC_ARG_ENABLE(profile, dnl [ --enable-profile build profiled library [default=yes]], profile=$enableval, profile=yes) AC_ARG_ENABLE(omitfp, dnl [ --enable-omitfp build undebuggable optimized library [default=no]], omitfp=$enableval, omitfp=no) dnl Generic infrastructure for drop-in additions to libc. AC_ARG_ENABLE(add-ons, dnl [ --enable-add-ons=DIR... configure and build named extra directories], [add_ons=`echo "$enableval" | sed 's/,/ /g'`], [add_ons=]) AC_CONFIG_SUBDIRS($add_ons) add_ons_pfx= if test x"$add_ons" != x; then for f in $add_ons; do add_ons_pfx="$add_ons_pfx $f/" done fi AC_CANONICAL_HOST # 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 # Some configurations imply other options. case "$host_os" in gnu* | linux* | bsd4.4* | netbsd* | freebsd*) # These systems always use GNU tools. gnu_ld=yes gnu_as=yes ;; esac case "$host_os" in linux*ecoff*) ;; gnu* | linux* | sysv4* | solaris2*) # These systems (almost) always use the ELF format. elf=yes ;; esac machine=$config_machine vendor=$config_vendor os=$config_os dnl We need to use [ and ] for other purposes for a while now. changequote(,)dnl # Expand the configuration machine name into a subdirectory by architecture # type and particular chip. case "$machine" in a29k | am29000) base_machine=a29k machine=a29k ;; alpha*) base_machine=alpha machine=alpha/$machine ;; hppa*) base_machine=hppa machine=hppa/$machine ;; i[3456]86) base_machine=i386 machine=i386/$machine ;; m680?0) base_machine=m68k machine=m68k/$machine ;; m68k) base_machine=m68k machine=m68k/m68020 ;; m88???) base_machine=m88k machine=m88k/$machine ;; m88k) base_machine=m88k machine=m88k/m88100 ;; mips*) base_machine=mips machine=mips/$machine ;; mips64*) base_machine=mips64 machine=mips/mips64/$machine ;; sparc[6789]) base_machine=sparc machine=sparc/$machine ;; supersparc) base_machine=sparc machine=sparc/sparc8 ;; esac changequote([,])dnl AC_SUBST(base_machine) # 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'`" case "$os" in gnu*) base_os=mach/hurd ;; netbsd* | 386bsd* | freebsd* | bsdi*) base_os=unix/bsd/bsd4.4 ;; osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*) base_os=unix/bsd ;; sysv* | isc* | esix* | sco* | minix* | irix4* | linux*) base_os=unix/sysv ;; solaris[2-9]*) base_os=unix/sysv/sysv4 ;; none) base_os=standalone ;; *) base_os='' ;; esac # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. tail=$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="$2" done # For sparc/sparc9, try sparc/sparc9 and then sparc. mach= tail=$machine 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 /$1/fpu" fi mach="$mach /$1" tail="$2" done dnl We are done with glob and regexp uses of [ and ]; return to autoconf. changequote([,])dnl # Find what sysdep directories exist. sysnames= IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:" for d in $add_ons_pfx ''; do for b in $base ''; do for m0 in $mach ''; do for v in /$vendor ''; do for o in /$ostry ''; do for m in $mach ''; do if test "$m0$b$v$o$m"; then try="${d}sysdeps$m0$b$v$o$m" test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2 case $try in /*) dest=$try ;; *) dest=$srcdir/$try ;; esac if test -d $dest; then sysnames="$sysnames $try" { test -n "$o" || test -n "$b"; } && os_used=t { test -n "$m" || test -n "$m0"; } && machine_used=t fi fi done done done done done done IFS="$ac_save_ifs" 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 $machine is not supported.) fi # We have now validated the configuration. # If using ELF, look for an `elf' subdirectory of each machine directory. # We prepend these rather than inserting them whereever the machine appears # because things specified by the machine's ELF ABI should override # OS-specific things, and should always be the same for any OS on the # machine (otherwise what's the point of an ABI?). if test "$elf" = yes; then elf_dirs= for d in $add_ons_pfx ''; do case $d in /*) xsrcdir= ;; *) xsrcdir=$srcdir/ ;; esac for m in $mach; do if test -d $xsrcdir${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 $ac_n "$name $ac_c" >&AC_FD_MSG 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 if test -d $xsrcdir$name_base/$x; then implied="$implied $name_base/$x"; else 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 $sysnames done # Add the default directories. sysnames="$names sysdeps/generic sysdeps/stub" AC_SUBST(sysnames) # The other names were emitted during the scan. AC_MSG_RESULT(sysdeps/generic sysdeps/stub) ### Locate tools. AC_PROG_INSTALL if test "$INSTALL" = "${srcdir}/install-sh -c"; then # The makefiles need to use a different form to find it in $srcdir. INSTALL='$(..)./install-sh -c' fi AC_PROG_LN_S AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :) AC_CHECK_TOOL(CC, gcc) if test $host != $build; then AC_CHECK_PROG(BUILD_CC, gcc cc) fi AC_PROG_CPP AC_CHECK_TOOL(AR, ar) AC_CHECK_TOOL(RANLIB, ranlib, :) AC_PATH_PROG(BASH, bash, no) if test "$BASH" != no && $BASH -c 'test "$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) AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl echo '#include <stddef.h> 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 <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 ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; 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 assembler global-symbol directive, libc_cv_asm_global_directive, [dnl libc_cv_asm_global_directive=UNKNOWN for ac_globl in .globl .global; do cat > conftest.s <<EOF .text ${ac_globl} foo foo: .long 0 EOF if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then libc_cv_asm_global_directive=${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 <<EOF .text foo: .long 0 .set glibc_conftest_frobozz,foo $libc_cv_asm_global_directive 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; main () { printf ("%d\n", glibc_conftest_frobozz); } EOF if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; 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 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 (".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 libc_cv_asm_underscores=no else 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)]) fi if test $libc_cv_asm_underscores = no; then AC_DEFINE(NO_UNDERSCORES) fi if test $elf = yes; then libc_cv_weak_symbols=yes libc_cv_asm_weak_directive=yes libc_cv_asm_weakext_directive=no else AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive, [dnl cat > conftest.s <<EOF .text ${libc_cv_asm_global_directive} foo foo: .long 0 .weak foo .weak bar; bar = foo EOF if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; 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 .text ${libc_cv_asm_global_directive} foo foo: .long 0 .weakext foo .weakext foo, bar EOF if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then libc_cv_asm_weakext_directive=yes else libc_cv_asm_weakext_directive=no fi rm -f conftest*]) fi # no .weak fi # not ELF if test $libc_cv_asm_weak_directive = yes; then AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE) elif test $libc_cv_asm_weakext_directive = yes; then AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE) fi AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl cat > conftest.c <<\EOF _start () {} int __eh_pc; __throw () {} EOF dnl No \ in command here because it ends up inside ''. if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles -Wl,--no-whole-archive -o conftest conftest.c]); then libc_cv_ld_no_whole_archive=yes else libc_cv_ld_no_whole_archive=no fi rm -f conftest*]) AC_SUBST(libc_cv_ld_no_whole_archive)dnl AC_CACHE_CHECK(for gcc -fno-exceptions, libc_cv_gcc_no_exceptions, [dnl cat > conftest.c <<\EOF _start () {} int __eh_pc; __throw () {} EOF dnl No \ in command here because it ends up inside ''. if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles -fno-exceptions -o conftest conftest.c]); then libc_cv_gcc_no_exceptions=yes else libc_cv_gcc_no_exceptions=no fi rm -f conftest*]) AC_SUBST(libc_cv_gcc_no_exceptions)dnl ### End of automated tests. ### Now run sysdeps configure fragments. # sysdeps configure fragments may set these with files to be linked below. libc_link_dests= libc_link_sources= # 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 $dest) . $dest/configure fi [ if test -z "$uname"; then if test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S || { test -r $sysdep_dir/$dir/syscalls.list && grep '^uname[ ]' $sysdep_dir/$dir/syscalls.list >/dev/null; }; then uname=$dir fi fi ]dnl done AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`) # If we will use the generic uname implementation, we must figure out what # it will say by examining the system, and write the results in config-name.h. if test "$uname" = 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 AC_REQUIRE([LIBC_KERNEL_ID])dnl 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 AC_REQUIRE([LIBC_KERNEL_ID])dnl 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 AC_MSG_CHECKING(stdio selection) AC_SUBST(stdio) case $stdio in libio) AC_DEFINE(USE_IN_LIBIO) ;; default) stdio=stdio ;; esac AC_MSG_RESULT($stdio) AC_MSG_CHECKING(malloc selection) AC_SUBST(malloc) case $malloc in new-malloc) USE_NEW_MALLOC=-DUSE_NEW_MALLOC ;; default) malloc=malloc ;; esac AC_SUBST(USE_NEW_MALLOC) AC_MSG_RESULT($malloc) AC_SUBST(libc_cv_slibdir) AC_SUBST(libc_cv_sysconfdir) AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) if test $gnu_ld = yes; then AC_DEFINE(HAVE_GNU_LD) fi if test $gnu_as = yes; then AC_DEFINE(HAVE_GNU_AS) fi if test $elf = yes; then AC_DEFINE(HAVE_ELF) fi AC_SUBST(shared) if test $shared = default; then if test $gnu_ld = yes; then shared=$elf else # For now we do not assume shared libs are available. In future more # tests might become available. shared=no fi fi AC_SUBST(profile) AC_SUBST(omitfp) AC_SUBST(DEFINES) if test "`(cd $srcdir; pwd)`" = "`pwd`"; then config_makefile= else config_makefile=Makefile fi VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h` AC_SUBST(VERSION) AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, , [echo '$config_vars' >> config.make])