diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/configure.in b/configure.in new file mode 100644 index 0000000..4d03b80 --- /dev/null +++ b/configure.in @@ -0,0 +1,413 @@ +dnl Process this file with autoconf to produce a configure script. +AC_REVISION([$Id$]) +AC_PREREQ(2.1)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 +]) + +AC_ARG_WITH(gnu-binutils, dnl + --with-gnu-binutils if using GNU binutils (as and ld), + gnu_binutils=yes, gnu_binutils=no) +AC_ARG_WITH(gnu-ld, dnl + --with-gnu-ld if using GNU ld (in the binutils package), + gnu_ld=yes, gnu_ld=no) +AC_ARG_WITH(gnu-as, dnl + --with-gnu-as if using GNU as (in the binutils package), + gnu_as=yes, gnu_as=no) +test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes +AC_ARG_WITH(elf, dnl + --with-elf if using the ELF object format, + elf=yes, elf=no) +AC_ARG_WITH(weak-symbols, dnl + --with-weak-symbols if weak symbols are available in as and ld, + weak=yes, weak=no) + +AC_CANONICAL_HOST +# We keep the original values in `$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 + +sysdep_dir=$srcdir/sysdeps +AC_MSG_CHECKING(sysdep dirs) +AC_CACHE_VAL(libc_cv_sysdirs, [dnl +machine=$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 "$machine" in +i[345]86) + machine=i386/$machine ;; +sparc[6789]) + machine=sparc/$machine ;; +m68k) + machine=m68k/m68020 ;; +m680?0) + machine=m68k/$machine ;; +m88k) + machine=m88k/m88100 ;; +m88???) + machine=m88k/$machine ;; +mips64*) + machine=mips/mips64/$machine ;; +mips*) + machine=mips/$machine ;; +esac + +# 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 "$os" in +gnu*) + base_os=mach/hurd ;; +netbsd* | 386bsd*) + base_os=unix/bsd/bsd4.4 ;; +osf1* | sunos* | ultrix* | newsos* | dynix* | *bsd*) + base_os=unix/bsd ;; +linux* | sysv* | isc* | esix* | sco* | minix* | irix4*) + base_os=unix/sysv ;; +solaris[2-9]*) + base_os=unix/sysv/sysv4 ;; +none) + base_os=standalone ;; +*) + base_os='' ;; +esac + +# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. +tail=$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 /$o" +fi + +# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix. +base= +tail=$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 $m + mach="$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= +for b in $base ''; do + for m0 in $mach ''; do + for v in /$vendor ''; do + for o in /$ostry ''; do + for m in $mach ''; do + try="$m0$b$v$o$m" + if test -d $sysdep_dir$try; then + sysnames="$sysnames $try" + { test -n "$o" || test -n "$b"; } && os_used=t + { test -n "$m" || test -n "$m0"; } && machine_used=t + fi + done + done + done + done +done + +if test -z "$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 + +# We have now validated the configuration. + +# Remove the leading slashes. +sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`" + +# Prepend the machine's FPU directory unless --without-fp. +if test "$with_fp" = no; then + fpu_dirs= + for m in $mach; do + if test -d $sysdep_dir$m/fpu; then + fpu_dirs="$fpu_dirs $m/fpu" + fi + done + sysnames="`echo $fpu_dirs | sed -e 's,^/,,' -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 +while test $# -gt 0; do + name=$1 + shift + + if test -f $sysdep_dir/$name/Implies; then + # Collect more names from the `Implies' file (removing comments). + implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`" + for x in $implied; do + test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2 + done + else + implied= + fi + + # Add NAME to the list of names. + names="$names $name" + + # Find the parent of NAME, using the empty string if it has none. +changequote(,)dnl + parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==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 $sysnames +done + +# Add the default directories. +names="$names generic stub" + +# Now uniquize the list. +seen= +sysnames= +for name in $names; do + if echo "$seen" | fgrep -x $name >/dev/null; then + # Already in the list. + true; + else + # A new one. + if test -z "$seen"; then + seen="$name" sysnames="$name" + else + seen="$seen +$name" + sysnames="$sysnames $name" + fi + fi +done +libc_cv_sysdirs="$sysnames"]) +AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs" +AC_MSG_RESULT(${sysnames}) + +case "$host_os" in +gnu* | linux* | bsd4.4* | netbsd* | freebsd*) + gnu_ld=yes gnu_as=yes +esac +case "$host_os" in +gnu*elf* | linux*elf* | sysv4* | solaris2*) + elf=yes +esac + +AC_PROG_INSTALL +if test "$INSTALL" = "${srcdir}/install-sh"; then + # The makefiles need to use a different form to find it in $srcdir. + INSTALL='$(..)./install-sh' +fi + +AC_PROG_CC +AC_PROG_CPP +AC_CHECK_PROG(AR, ar, ar, ar) +AC_PROG_RANLIB + +AC_MSG_CHECKING(signed size_t type) +AC_CACHE_VAL(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*]) +AC_MSG_RESULT($libc_cv_signed_size_t) +if test $libc_cv_signed_size_t = yes; then + dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings. + cat >> confdefs.h <<\EOF +#undef __SIZE_TYPE__ +#define __SIZE_TYPE__ unsigned +EOF +fi + +AC_MSG_CHECKING(libc-friendly stddef.h) +AC_CACHE_VAL(libc_cv_friendly_stddef, [dnl +AC_TRY_COMPILE(dnl +[#define __need_size_t +#define __need_wchar_t +#include <stddef.h> +#define __need_NULL +#include <stddef.h>], [size_t size; wchar_t wchar; +#ifdef offsetof +#error stddef.h ignored __need_* +#endif +if (&size == NULL || &wchar == NULL) abort ();], + libc_cv_friendly_stddef=yes, + libc_cv_friendly_stddef=no)]) +AC_MSG_RESULT($libc_cv_friendly_stddef) +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_MSG_CHECKING(whether we need to use -P to assemble .S files) +AC_CACHE_VAL(libc_cv_need_minus_P, [dnl +cat > conftest.S <<EOF +#include "confdefs.h" +/* Nothing whatsoever. */ +EOF +if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then + libc_cv_need_minus_P=no +else + libc_cv_need_minus_P=yes +fi +rm -f conftest*]) +AC_MSG_RESULT($libc_cv_need_minus_P) +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 + +# 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 + if test -r $sysdep_dir/$dir/configure; then + AC_MSG_RESULT(running configure fragment for $dir) + . $sysdep_dir/$dir/configure + fi + if test -z "$uname"; then + { test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S; } \ + && uname=$dir + fi +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_MSG_CHECKING(OS release for uname) + AC_CACHE_VAL(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=$kernel_release + else + libc_cv_uname_release=unknown + fi]) + AC_MSG_RESULT($libc_cv_uname_release) + uname_release="$libc_cv_uname_release" + + AC_MSG_CHECKING(OS version for uname) + AC_CACHE_VAL(libc_cv_uname_version, [dnl +AC_REQUIRE([LIBC_KERNEL_ID])dnl +changequote(,)dnl + kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'` +changequote([,])dnl + if test -n "$kernel_version"; then + libc_cv_uname_version="$kernel_version" + else + libc_cv_uname_version=unknown + fi]) + AC_MSG_RESULT($libc_cv_uname_version) + 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_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(weak) +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 +if test $weak = yes; then + AC_DEFINE(HAVE_WEAK_SYMBOLS) +fi + + +if test "`(cd $srcdir; pwd)`" = "`pwd`"; then + config_makefile= +else + config_makefile=Makefile +fi + +AC_OUTPUT(config.make ${config_makefile} ${config_uname}, , + [echo '$config_vars' >> config.make]) |