mirror of
https://sourceware.org/git/glibc.git
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502 lines
14 KiB
Plaintext
502 lines
14 KiB
Plaintext
dnl Process this file with autoconf to produce a configure script.
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AC_REVISION([$CVSid$])
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AC_PREREQ(2.2)dnl dnl Minimum Autoconf version required.
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AC_INIT(features.h)
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AC_CONFIG_HEADER(config.h)
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# This will get text that should go into config.make.
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config_vars=
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# Check for a --with-gmp argument and set gmp-srcdir in config.make.
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AC_ARG_WITH(gmp, dnl
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--with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
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[dnl
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case "$with_gmp" in
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yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
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''|no) ;;
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*) config_vars="$config_vars
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gmp-srcdir = $withval" ;;
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esac
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])
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dnl Arguments to specify presence of other packages/features.
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AC_ARG_WITH(fp, dnl
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--with-fp if using floating-point hardware,
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with_fp=$withval, with_fp=yes)
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AC_ARG_WITH(gnu-binutils, dnl
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--with-gnu-binutils if using GNU binutils (as and ld),
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gnu_binutils=$withval, gnu_binutils=no)
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AC_ARG_WITH(gnu-ld, dnl
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--with-gnu-ld if using GNU ld (in the binutils package),
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gnu_ld=$withval, gnu_ld=no)
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AC_ARG_WITH(gnu-as, dnl
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--with-gnu-as if using GNU as (in the binutils package),
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gnu_as=$withval, gnu_as=no)
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test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes
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AC_ARG_WITH(elf, dnl
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--with-elf if using the ELF object format,
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elf=$withval, elf=no)
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AC_ARG_WITH(weak-symbols, dnl
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--with-weak-symbols if weak symbols are available in as and ld,
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weak=$withval, weak=no)
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dnl Arguments to enable or disable building the shared, profiled, and
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dnl -fomit-frame-pointer libraries.
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AC_ARG_ENABLE(shared, dnl
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[ --enable-shared build shared library [default=yes if GNU ld & ELF]],
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shared=$enableval, shared=default)
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AC_ARG_ENABLE(profile, dnl
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[ --enable-profile build profiled library [default=yes]],
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profile=$enableval, profile=yes)
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AC_ARG_ENABLE(omitfp, dnl
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[ --enable-omitfp build undebuggable optimized library [default=no]],
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omitfp=$enableval, omitfp=no)
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AC_CANONICAL_HOST
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# We keep the original values in `$config_*' and never modify them, so we
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# can write them unchanged into config.make. Everything else uses
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# $machine, $vendor, and $os, and changes them whenever convenient.
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config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
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# Some configurations imply other options.
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case "$host_os" in
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gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
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# These systems always use GNU tools.
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gnu_ld=yes gnu_as=yes
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esac
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case "$host_os" in
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gnu* | linux* | sysv4* | solaris2*)
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# These systems always use the ELF format.
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elf=yes
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esac
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# Compute the list of sysdep directories for this configuration.
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sysdep_dir=$srcdir/sysdeps
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AC_MSG_CHECKING(sysdep dirs)
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AC_CACHE_VAL(libc_cv_sysdirs, [dnl
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machine=$config_machine
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vendor=$config_vendor
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os=$config_os
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dnl We need to use [ and ] for other purposes for a while now.
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changequote(,)dnl
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# Expand the configuration machine name into a subdirectory by architecture
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# type and particular chip.
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case "$machine" in
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i[345]86)
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machine=i386/$machine ;;
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sparc[6789])
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machine=sparc/$machine ;;
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m68k)
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machine=m68k/m68020 ;;
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m680?0)
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machine=m68k/$machine ;;
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m88k)
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machine=m88k/m88100 ;;
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m88???)
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machine=m88k/$machine ;;
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mips64*)
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machine=mips/mips64/$machine ;;
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mips*)
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machine=mips/$machine ;;
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esac
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# Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
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os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
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case "$os" in
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gnu*)
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base_os=mach/hurd ;;
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netbsd* | 386bsd* | freebsd* | bsdi*)
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base_os=unix/bsd/bsd4.4 ;;
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osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
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base_os=unix/bsd ;;
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linux* | sysv* | isc* | esix* | sco* | minix* | irix4*)
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base_os=unix/sysv ;;
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solaris[2-9]*)
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base_os=unix/sysv/sysv4 ;;
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none)
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base_os=standalone ;;
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*)
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base_os='' ;;
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esac
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# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
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tail=$os
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ostry=$os
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while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
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ostry="$ostry /$o"
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tail=$o
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done
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o=`echo $tail | sed 's/[0-9]*$//'`
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if test $o != $tail; then
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ostry="$ostry /$o"
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fi
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# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
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base=
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tail=$base_os
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while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
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set $b
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base="$base /$1"
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tail="$2"
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done
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# For sparc/sparc9, try sparc/sparc9 and then sparc.
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mach=
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tail=$machine
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while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
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set $m
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# Prepend the machine's FPU directory unless --without-fp.
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if test "$with_fp" = yes; then
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mach="$mach /$1/fpu"
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fi
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mach="$mach /$1"
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tail="$2"
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done
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dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
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changequote([,])dnl
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# Find what sysdep directories exist.
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sysnames=
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for b in $base ''; do
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for m0 in $mach ''; do
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for v in /$vendor ''; do
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for o in /$ostry ''; do
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for m in $mach ''; do
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try="$m0$b$v$o$m"
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if test -d $sysdep_dir$try; then
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sysnames="$sysnames $try"
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{ test -n "$o" || test -n "$b"; } && os_used=t
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{ test -n "$m" || test -n "$m0"; } && machine_used=t
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fi
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done
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done
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done
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done
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done
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if test -z "$os_used" && test "$os" != none; then
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AC_MSG_ERROR(Operating system $os is not supported.)
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fi
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if test -z "$machine_used" && test "$machine" != none; then
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AC_MSG_ERROR(The $machine is not supported.)
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fi
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# We have now validated the configuration.
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# If using ELF, look for an `elf' subdirectory of each machine directory.
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# We prepend these rather than inserting them whereever the machine appears
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# because things specified by the machine's ELF ABI should override
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# OS-specific things, and should always be the same for any OS on the
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# machine (otherwise what's the point of an ABI?).
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if test "$elf" = yes; then
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elf_dirs=
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for m in $mach; do
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if test -d $sysdep_dir$m/elf; then
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elf_dirs="$elf_dirs $m/elf"
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fi
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done
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sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
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fi
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# Remove the leading slashes.
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sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"
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# Expand the list of system names into a full list of directories
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# from each element's parent name and Implies file (if present).
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set $sysnames
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while test $# -gt 0; do
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name=$1
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shift
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if test -f $sysdep_dir/$name/Implies; then
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# Collect more names from the `Implies' file (removing comments).
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implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
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for x in $implied; do
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test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2
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done
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else
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implied=
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fi
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# Add NAME to the list of names.
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names="$names $name"
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# Find the parent of NAME, using the empty string if it has none.
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changequote(,)dnl
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parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
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changequote([,])dnl
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# Add the names implied by NAME, and NAME's parent (if it has one), to
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# the list of names to be processed (the argument list). We prepend the
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# implied names to the list and append the parent. We want implied
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# directories to come before further directories inferred from the
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# configuration components; this ensures that for sysv4, unix/common
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# (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
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# after sysv4).
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sysnames="`echo $implied $* $parent`"
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test -n "$sysnames" && set $sysnames
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done
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# Add the default directories.
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names="$names generic stub"
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# Now uniquize the list.
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seen=
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sysnames=
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for name in $names; do
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if echo "$seen" | fgrep -x $name >/dev/null; then
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# Already in the list.
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true;
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else
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# A new one.
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if test -z "$seen"; then
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seen="$name" sysnames="$name"
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else
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seen="$seen
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$name"
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sysnames="$sysnames $name"
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fi
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fi
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done
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libc_cv_sysdirs="$sysnames"])
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AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
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AC_MSG_RESULT(${sysnames})
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AC_PROG_INSTALL
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if test "$INSTALL" = "${srcdir}/install-sh"; then
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# The makefiles need to use a different form to find it in $srcdir.
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INSTALL='$(..)./install-sh'
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fi
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AC_CHECK_TOOL(CC, gcc)
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AC_CHECK_TOOL(AR, ar)
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AC_CHECK_TOOL(RANLIB, ranlib, :)
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AC_PROG_CPP
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AC_MSG_CHECKING(signed size_t type)
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AC_CACHE_VAL(libc_cv_signed_size_t, [dnl
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echo '#include <stddef.h>
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FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
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if eval "$ac_cpp conftest.c 2>/dev/null" \
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| grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
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libc_cv_signed_size_t=no
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else
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libc_cv_signed_size_t=yes
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fi
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rm -f conftest*])
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AC_MSG_RESULT($libc_cv_signed_size_t)
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if test $libc_cv_signed_size_t = yes; then
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dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
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cat >> confdefs.h <<\EOF
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#undef __SIZE_TYPE__
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#define __SIZE_TYPE__ unsigned
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EOF
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fi
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AC_MSG_CHECKING(libc-friendly stddef.h)
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AC_CACHE_VAL(libc_cv_friendly_stddef, [dnl
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AC_TRY_COMPILE(dnl
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[#define __need_size_t
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#define __need_wchar_t
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#include <stddef.h>
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#define __need_NULL
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#include <stddef.h>], [size_t size; wchar_t wchar;
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#ifdef offsetof
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#error stddef.h ignored __need_*
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#endif
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if (&size == NULL || &wchar == NULL) abort ();],
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libc_cv_friendly_stddef=yes,
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libc_cv_friendly_stddef=no)])
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AC_MSG_RESULT($libc_cv_friendly_stddef)
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if test $libc_cv_friendly_stddef = yes; then
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config_vars="$config_vars
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override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
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fi
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AC_MSG_CHECKING(whether we need to use -P to assemble .S files)
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AC_CACHE_VAL(libc_cv_need_minus_P, [dnl
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cat > conftest.S <<EOF
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#include "confdefs.h"
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/* Nothing whatsoever. */
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EOF
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if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
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libc_cv_need_minus_P=no
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else
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libc_cv_need_minus_P=yes
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fi
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rm -f conftest*])
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AC_MSG_RESULT($libc_cv_need_minus_P)
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if test $libc_cv_need_minus_P = yes; then
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config_vars="$config_vars
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asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
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fi
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AC_MSG_CHECKING(for .set assembler directive)
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AC_CACHE_VAL(libc_cv_asm_set_directive, [dnl
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cat > conftest.s <<\EOF
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.text
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foo: .long 0
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.set glibc_conftest_frobozz,foo
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EOF
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# The alpha-dec-osf1 assembler gives only a warning for `.set'
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# (but it doesn't work), so we must do a linking check to be sure.
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cat > conftest1.c <<\EOF
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extern int glibc_conftest_frobozz;
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main () { printf ("%d\n", glibc_conftest_frobozz); }
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EOF
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if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
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conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
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libc_cv_asm_set_directive=yes
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else
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libc_cv_asm_set_directive=no
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fi
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rm -f conftest*])
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AC_MSG_RESULT($libc_cv_asm_set_directive)
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if test $libc_cv_asm_set_directive = yes; then
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AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
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fi
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AC_MSG_CHECKING(for assembler global-symbol directive)
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AC_CACHE_VAL(libc_cv_asm_global_directive, [dnl
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libc_cv_asm_global_directive=UNKNOWN
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for ac_globl in .globl .global; do
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cat > conftest.s <<EOF
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.text
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${ac_globl} foo
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foo: .long 0
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EOF
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if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
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libc_cv_asm_global_directive=${ac_globl}
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fi
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rm -f conftest*
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test $libc_cv_asm_global_directive != UNKNOWN && break
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done])
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AC_MSG_RESULT($libc_cv_asm_global_directive)
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if test $libc_cv_asm_global_directive = UNKNOWN; then
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AC_MSG_ERROR(cannot determine asm global directive)
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else
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AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
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fi
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# sysdeps configure fragments may set these with files to be linked below.
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libc_link_dests=
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libc_link_sources=
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# Iterate over all the sysdep directories we will use, running their
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# configure fragments, and looking for a uname implementation.
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uname=
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for dir in $sysnames; do
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if test -r $sysdep_dir/$dir/configure; then
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AC_MSG_RESULT(running configure fragment for $dir)
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. $sysdep_dir/$dir/configure
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fi
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if test -z "$uname"; then
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{ test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S; } \
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&& uname=$dir
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fi
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done
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AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
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|
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# If we will use the generic uname implementation, we must figure out what
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# it will say by examining the system, and write the results in config-name.h.
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|
if test "$uname" = generic; then
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changequote(,)dnl
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uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
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changequote([,])dnl
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|
if test $uname_sysname != $config_os; then
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config_release=`echo $config_os | sed s/$uname_sysname//`
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fi
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dnl
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AC_DEFUN(LIBC_KERNEL_ID, [dnl
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|
if test -r /vmunix; then
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kernel_id=`strings /vmunix | grep UNIX`
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elif test -r /dynix; then
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kernel_id=`strings /dynix | grep DYNIX`
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else
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kernel_id=
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fi
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])dnl
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AC_MSG_CHECKING(OS release for uname)
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AC_CACHE_VAL(libc_cv_uname_release, [dnl
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AC_REQUIRE([LIBC_KERNEL_ID])dnl
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|
changequote(,)dnl
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kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
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changequote([,])dnl
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if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
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!= x$config_release; then
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# The configuration release is a substring of the kernel release.
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libc_cv_uname_release=$kernel_release
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elif test x$config_release != x; then
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libc_cv_uname_release=$config_release
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|
elif test x$kernel_release != x; then
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libc_cv_uname_release=$kernel_release
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else
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libc_cv_uname_release=unknown
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|
fi])
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|
AC_MSG_RESULT($libc_cv_uname_release)
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uname_release="$libc_cv_uname_release"
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AC_MSG_CHECKING(OS version for uname)
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AC_CACHE_VAL(libc_cv_uname_version, [dnl
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|
AC_REQUIRE([LIBC_KERNEL_ID])dnl
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|
changequote(,)dnl
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kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
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|
changequote([,])dnl
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|
if test -n "$kernel_version"; then
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libc_cv_uname_version="$kernel_version"
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else
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libc_cv_uname_version=unknown
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|
fi])
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|
AC_MSG_RESULT($libc_cv_uname_version)
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|
uname_version="$libc_cv_uname_version"
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AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
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|
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
|
|
|
|
AC_SUBST(shared)
|
|
if test $shared = default; then
|
|
if test $gnu_ld = yes; then
|
|
shared=$elf
|
|
fi
|
|
fi
|
|
AC_SUBST(profile)
|
|
AC_SUBST(omitfp)
|
|
|
|
|
|
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])
|