[glibc.git] / configure.in

Dnl Process this file with autoconf to produce a configure script.
AC_REVISION([$CVSid$])
AC_PREREQ(2.4.2)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,
	    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_WITH(weak-symbols, dnl
  --with-weak-symbols	  if weak symbols are available in as and ld,
	    weak=$withval, weak=no)

AC_ARG_ENABLE(libio, dnl
[  --enable-libio          build in GNU libio instead of GNU stdio],
 	      stdio=libio, stdio=default)

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)

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

# 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
gnu* | linux* | sysv4* | solaris2*)
  # These systems always use the ELF format.
  elf=yes
esac

# Compute the list of sysdep directories for this configuration.
sysdep_dir=$srcdir/sysdeps
AC_CACHE_CHECK(sysdep dirs, libc_cv_sysdirs, [dnl
machine=$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 "$machine" in
a29k | am29000)	machine=a29k ;;
alpha*)		machine=alpha/$machine ;;
hppa*)		machine=hppa/$machine ;;
i[345]86)	machine=i386/$machine ;;
m680?0)		machine=m68k/$machine ;;
m68k)		machine=m68k/m68020 ;;
m88???)		machine=m88k/$machine ;;
m88k)		machine=m88k/m88100 ;;
mips*)		machine=mips/$machine ;;
mips64*)	machine=mips/mips64/$machine ;;
sparc[6789])	machine=sparc/$machine ;;
supersparc)	machine=sparc/sparc8 ;;
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* | 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 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=
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"
	  test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
	  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.


# 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 m in $mach; do
    if test -d $sysdep_dir$m/elf; then
      elf_dirs="$elf_dirs $m/elf"
    fi
  done
  sysnames="`echo $elf_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
fi


# Remove the leading slashes.
sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"


# 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_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_CHECK_TOOL(CC, gcc)
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, :)
AC_PROG_CPP

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");],
				 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

# 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_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_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])
Commit	Line	Data
d586354e	1	Dnl Process this file with autoconf to produce a configure script.
ff3d7ed3	2	AC_REVISION([$CVSid$])
b8dc6a10	3	AC_PREREQ(2.4.2)dnl dnl Minimum Autoconf version required.
28f540f4 RM	4	AC_INIT(features.h)
	5	AC_CONFIG_HEADER(config.h)
	6
	7	# This will get text that should go into config.make.
	8	config_vars=
	9
	10	# Check for a --with-gmp argument and set gmp-srcdir in config.make.
	11	AC_ARG_WITH(gmp, dnl
	12	--with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
	13	[dnl
	14	case "$with_gmp" in
	15	yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
	16	''\|no) ;;
	17	*) config_vars="$config_vars
	18	gmp-srcdir = $withval" ;;
	19	esac
	20	])
75914335 RM	21	# Check for a --with-gettext argument and set gettext-srcdir in config.make.
	22	AC_ARG_WITH(gettext, dnl
	23	--with-gettext=DIR find GNU gettext source code in DIR (not needed),
	24	[dnl
	25	case "$with_gettext" in
	26	yes)
	27	AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
	28	''\|no) ;;
	29	*)
	30	config_vars="$config_vars
	31	gettext-srcdir = $withval" ;;
	32	esac
	33	])
28f540f4	34
ff3d7ed3	35	dnl Arguments to specify presence of other packages/features.
335aa320 RM	36	AC_ARG_WITH(fp, dnl
	37	--with-fp if using floating-point hardware,
	38	with_fp=$withval, with_fp=yes)
28f540f4 RM	39	AC_ARG_WITH(gnu-binutils, dnl
28f540f4 RM	40	--with-gnu-binutils if using GNU binutils (as and ld),
335aa320	41	gnu_binutils=$withval, gnu_binutils=no)
28f540f4 RM	42	AC_ARG_WITH(gnu-ld, dnl
28f540f4 RM	43	--with-gnu-ld if using GNU ld (in the binutils package),
335aa320	44	gnu_ld=$withval, gnu_ld=no)
28f540f4 RM	45	AC_ARG_WITH(gnu-as, dnl
28f540f4 RM	46	--with-gnu-as if using GNU as (in the binutils package),
335aa320	47	gnu_as=$withval, gnu_as=no)
28f540f4 RM	48	test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes
	49	AC_ARG_WITH(elf, dnl
	50	--with-elf if using the ELF object format,
335aa320	51	elf=$withval, elf=no)
28f540f4 RM	52	AC_ARG_WITH(weak-symbols, dnl
28f540f4 RM	53	--with-weak-symbols if weak symbols are available in as and ld,
335aa320	54	weak=$withval, weak=no)
28f540f4	55
deab9dea RM	56	AC_ARG_ENABLE(libio, dnl
deab9dea RM	57	[ --enable-libio build in GNU libio instead of GNU stdio],
96aa2d94	58	stdio=libio, stdio=default)
deab9dea	59
ff3d7ed3 RM	60	dnl Arguments to enable or disable building the shared, profiled, and
	61	dnl -fomit-frame-pointer libraries.
	62	AC_ARG_ENABLE(shared, dnl
	63	[ --enable-shared build shared library [default=yes if GNU ld & ELF]],
424f8c09	64	shared=$enableval, shared=default)
ff3d7ed3 RM	65	AC_ARG_ENABLE(profile, dnl
ff3d7ed3 RM	66	[ --enable-profile build profiled library [default=yes]],
424f8c09	67	profile=$enableval, profile=yes)
ff3d7ed3 RM	68	AC_ARG_ENABLE(omitfp, dnl
ff3d7ed3 RM	69	[ --enable-omitfp build undebuggable optimized library [default=no]],
424f8c09	70	omitfp=$enableval, omitfp=no)
ff3d7ed3	71
28f540f4 RM	72	AC_CANONICAL_HOST
	73	# We keep the original values in `$config_*' and never modify them, so we
	74	# can write them unchanged into config.make. Everything else uses
	75	# $machine, $vendor, and $os, and changes them whenever convenient.
	76	config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
	77
a2fe9c76 RM	78	# Some configurations imply other options.
	79	case "$host_os" in
	80	gnu* \| linux* \| bsd4.4* \| netbsd* \| freebsd*)
	81	# These systems always use GNU tools.
	82	gnu_ld=yes gnu_as=yes
	83	esac
	84	case "$host_os" in
	85	gnu* \| linux* \| sysv4* \| solaris2*)
	86	# These systems always use the ELF format.
	87	elf=yes
	88	esac
	89
	90	# Compute the list of sysdep directories for this configuration.
28f540f4	91	sysdep_dir=$srcdir/sysdeps
b8dc6a10	92	AC_CACHE_CHECK(sysdep dirs, libc_cv_sysdirs, [dnl
28f540f4 RM	93	machine=$config_machine
	94	vendor=$config_vendor
	95	os=$config_os
	96
	97	dnl We need to use [ and ] for other purposes for a while now.
	98	changequote(,)dnl
	99	# Expand the configuration machine name into a subdirectory by architecture
	100	# type and particular chip.
	101	case "$machine" in
8f5ca04b RM	102	a29k \| am29000) machine=a29k ;;
	103	alpha*) machine=alpha/$machine ;;
	104	hppa*) machine=hppa/$machine ;;
	105	i[345]86) machine=i386/$machine ;;
	106	m680?0) machine=m68k/$machine ;;
	107	m68k) machine=m68k/m68020 ;;
	108	m88???) machine=m88k/$machine ;;
	109	m88k) machine=m88k/m88100 ;;
	110	mips*) machine=mips/$machine ;;
	111	mips64*) machine=mips/mips64/$machine ;;
	112	sparc[6789]) machine=sparc/$machine ;;
	113	supersparc) machine=sparc/sparc8 ;;
28f540f4 RM	114	esac
	115
	116	# Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
	117	os="`echo $os \| sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
	118
	119	case "$os" in
	120	gnu*)
	121	base_os=mach/hurd ;;
883bc19b	122	netbsd* \| 386bsd* \| freebsd* \| bsdi*)
28f540f4	123	base_os=unix/bsd/bsd4.4 ;;
222c4e71	124	osf* \| sunos* \| ultrix* \| newsos* \| dynix* \| bsd)
28f540f4	125	base_os=unix/bsd ;;
d586354e	126	sysv* \| isc* \| esix* \| sco* \| minix* \| irix4* \| linux*)
28f540f4	127	base_os=unix/sysv ;;
d586354e	128	solaris[2-9]*)
28f540f4 RM	129	base_os=unix/sysv/sysv4 ;;
	130	none)
	131	base_os=standalone ;;
	132	*)
	133	base_os='' ;;
	134	esac
	135
	136	# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
	137	tail=$os
	138	ostry=$os
	139	while o=`echo $tail \| sed 's/\.[^.]*$//'`; test $o != $tail; do
	140	ostry="$ostry /$o"
	141	tail=$o
75914335	142	done
28f540f4 RM	143	o=`echo $tail \| sed 's/[0-9]*$//'`
	144	if test $o != $tail; then
	145	ostry="$ostry /$o"
	146	fi
	147
	148	# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
	149	base=
	150	tail=$base_os
	151	while b=`echo $tail \| sed 's@^\(.\)/\([^/]\)$@& \1@'`; test -n "$b"; do
	152	set $b
	153	base="$base /$1"
	154	tail="$2"
	155	done
	156
	157	# For sparc/sparc9, try sparc/sparc9 and then sparc.
	158	mach=
	159	tail=$machine
	160	while m=`echo $tail \| sed 's@^\(.\)/\([^/]\)$@& \1@'`; test -n "$m"; do
	161	set $m
10ceac89 RM	162	# Prepend the machine's FPU directory unless --without-fp.
	163	if test "$with_fp" = yes; then
	164	mach="$mach /$1/fpu"
82d00cab	165	fi
28f540f4 RM	166	mach="$mach /$1"
	167	tail="$2"
	168	done
	169
	170	dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
	171	changequote([,])dnl
	172
	173	# Find what sysdep directories exist.
	174	sysnames=
	175	for b in $base ''; do
	176	for m0 in $mach ''; do
	177	for v in /$vendor ''; do
	178	for o in /$ostry ''; do
	179	for m in $mach ''; do
	180	try="$m0$b$v$o$m"
587dbc6f	181	test -n "$enable_debug_configure" && echo "$0 [DEBUG]: try $try" >&2
28f540f4 RM	182	if test -d $sysdep_dir$try; then
	183	sysnames="$sysnames $try"
	184	{ test -n "$o" \|\| test -n "$b"; } && os_used=t
	185	{ test -n "$m" \|\| test -n "$m0"; } && machine_used=t
	186	fi
	187	done
	188	done
	189	done
	190	done
	191	done
	192
	193	if test -z "$os_used" && test "$os" != none; then
	194	AC_MSG_ERROR(Operating system $os is not supported.)
	195	fi
	196	if test -z "$machine_used" && test "$machine" != none; then
	197	AC_MSG_ERROR(The $machine is not supported.)
	198	fi
	199
	200	# We have now validated the configuration.
	201
335aa320	202
10ceac89 RM	203	# If using ELF, look for an `elf' subdirectory of each machine directory.
	204	# We prepend these rather than inserting them whereever the machine appears
	205	# because things specified by the machine's ELF ABI should override
	206	# OS-specific things, and should always be the same for any OS on the
	207	# machine (otherwise what's the point of an ABI?).
	208	if test "$elf" = yes; then
	209	elf_dirs=
28f540f4	210	for m in $mach; do
10ceac89 RM	211	if test -d $sysdep_dir$m/elf; then
10ceac89 RM	212	elf_dirs="$elf_dirs $m/elf"
28f540f4 RM	213	fi
28f540f4 RM	214	done
10ceac89	215	sysnames="`echo $elf_dirs \| sed -e 's,^/,,' -e 's, /,,g'` $sysnames"
28f540f4 RM	216	fi
28f540f4 RM	217
335aa320	218
10ceac89 RM	219	# Remove the leading slashes.
	220	sysnames="`echo $sysnames \| sed -e 's@^/@@' -e 's@ /@ @g'`"
	221
335aa320	222
28f540f4 RM	223	# Expand the list of system names into a full list of directories
	224	# from each element's parent name and Implies file (if present).
	225	set $sysnames
	226	while test $# -gt 0; do
	227	name=$1
	228	shift
	229
	230	if test -f $sysdep_dir/$name/Implies; then
	231	# Collect more names from the `Implies' file (removing comments).
	232	implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`"
	233	for x in $implied; do
	234	test -d $sysdep_dir/$x \|\| echo "Warning: $name implies nonexistent $x">&2
	235	done
	236	else
	237	implied=
	238	fi
	239
	240	# Add NAME to the list of names.
	241	names="$names $name"
	242
	243	# Find the parent of NAME, using the empty string if it has none.
	244	changequote(,)dnl
	245	parent="`echo $name \| sed -n -e '/\//!q' -e 's=/[^/]*$==p'`"
	246	changequote([,])dnl
	247
	248	# Add the names implied by NAME, and NAME's parent (if it has one), to
	249	# the list of names to be processed (the argument list). We prepend the
	250	# implied names to the list and append the parent. We want implied
	251	# directories to come before further directories inferred from the
	252	# configuration components; this ensures that for sysv4, unix/common
	253	# (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
	254	# after sysv4).
	255	sysnames="`echo $implied $* $parent`"
	256	test -n "$sysnames" && set $sysnames
	257	done
	258
	259	# Add the default directories.
	260	names="$names generic stub"
	261
	262	# Now uniquize the list.
	263	seen=
	264	sysnames=
	265	for name in $names; do
	266	if echo "$seen" \| fgrep -x $name >/dev/null; then
	267	# Already in the list.
	268	true;
	269	else
	270	# A new one.
	271	if test -z "$seen"; then
	272	seen="$name" sysnames="$name"
	273	else
	274	seen="$seen
	275	$name"
	276	sysnames="$sysnames $name"
	277	fi
	278	fi
	279	done
	280	libc_cv_sysdirs="$sysnames"])
	281	AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs"
28f540f4	282
28f540f4 RM	283	AC_PROG_INSTALL
	284	if test "$INSTALL" = "${srcdir}/install-sh"; then
	285	# The makefiles need to use a different form to find it in $srcdir.
	286	INSTALL='$(..)./install-sh'
	287	fi
	288
ff3d7ed3 RM	289	AC_CHECK_TOOL(CC, gcc)
	290	AC_CHECK_TOOL(AR, ar)
	291	AC_CHECK_TOOL(RANLIB, ranlib, :)
28f540f4	292	AC_PROG_CPP
28f540f4	293
b8dc6a10	294	AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
28f540f4 RM	295	echo '#include <stddef.h>
	296	FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
	297	if eval "$ac_cpp conftest.c 2>/dev/null" \
	298	\| grep '^FOOBAR.unsigned.FOOBAR$' >/dev/null; then
	299	libc_cv_signed_size_t=no
	300	else
	301	libc_cv_signed_size_t=yes
	302	fi
	303	rm -f conftest*])
28f540f4 RM	304	if test $libc_cv_signed_size_t = yes; then
	305	dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
	306	cat >> confdefs.h <<\EOF
	307	#undef __SIZE_TYPE__
	308	#define __SIZE_TYPE__ unsigned
	309	EOF
	310	fi
	311
b8dc6a10	312	AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
28f540f4 RM	313	AC_TRY_COMPILE(dnl
	314	[#define __need_size_t
	315	#define __need_wchar_t
	316	#include <stddef.h>
	317	#define __need_NULL
	318	#include <stddef.h>], [size_t size; wchar_t wchar;
	319	#ifdef offsetof
	320	#error stddef.h ignored __need_*
	321	#endif
	322	if (&size == NULL \|\| &wchar == NULL) abort ();],
	323	libc_cv_friendly_stddef=yes,
	324	libc_cv_friendly_stddef=no)])
28f540f4 RM	325	if test $libc_cv_friendly_stddef = yes; then
	326	config_vars="$config_vars
	327	override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
	328	fi
	329
b8dc6a10 RM	330	AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
b8dc6a10 RM	331	libc_cv_need_minus_P, [dnl
28f540f4 RM	332	cat > conftest.S <<EOF
	333	#include "confdefs.h"
	334	/* Nothing whatsoever. */
	335	EOF
	336	if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
	337	libc_cv_need_minus_P=no
	338	else
	339	libc_cv_need_minus_P=yes
	340	fi
	341	rm -f conftest*])
28f540f4 RM	342	if test $libc_cv_need_minus_P = yes; then
	343	config_vars="$config_vars
	344	asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
	345	fi
	346
b8dc6a10 RM	347	AC_CACHE_CHECK(for assembler global-symbol directive,
b8dc6a10 RM	348	libc_cv_asm_global_directive, [dnl
9a70fcab UD	349	libc_cv_asm_global_directive=UNKNOWN
	350	for ac_globl in .globl .global; do
	351	cat > conftest.s <<EOF
	352	.text
	353	${ac_globl} foo
	354	foo: .long 0
	355	EOF
	356	if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
	357	libc_cv_asm_global_directive=${ac_globl}
	358	fi
	359	rm -f conftest*
	360	test $libc_cv_asm_global_directive != UNKNOWN && break
	361	done])
9a70fcab UD	362	if test $libc_cv_asm_global_directive = UNKNOWN; then
	363	AC_MSG_ERROR(cannot determine asm global directive)
	364	else
	365	AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
	366	fi
	367
b8dc6a10	368	AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
9a70fcab	369	cat > conftest.s <<EOF
e215c478 RM	370	.text
e215c478 RM	371	foo: .long 0
df2a0c93	372	.set glibc_conftest_frobozz,foo
9a70fcab	373	$libc_cv_asm_global_directive glibc_conftest_frobozz
e215c478	374	EOF
df2a0c93 RM	375	# The alpha-dec-osf1 assembler gives only a warning for `.set'
	376	# (but it doesn't work), so we must do a linking check to be sure.
	377	cat > conftest1.c <<\EOF
	378	extern int glibc_conftest_frobozz;
	379	main () { printf ("%d\n", glibc_conftest_frobozz); }
	380	EOF
	381	if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
cb2f05ed	382	-o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
e215c478 RM	383	libc_cv_asm_set_directive=yes
	384	else
	385	libc_cv_asm_set_directive=no
	386	fi
65b3cbcb	387	rm -f conftest*])
e215c478 RM	388	if test $libc_cv_asm_set_directive = yes; then
	389	AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
	390	fi
	391
b8dc6a10 RM	392	if test $elf != yes; then
	393	AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
	394	[AC_TRY_COMPILE(, [asm (".section .init");
	395	asm (".section .fini");],
	396	libc_cv_have_initfini=yes,
	397	libc_cv_have_initfini=no)])
	398	AC_SUBST(libc_cv_have_initfini)dnl
	399	if test $libc_cv_have_initfini = yes; then
	400	AC_DEFINE(HAVE_INITFINI)
	401	fi
	402	fi
e215c478	403
28f540f4 RM	404	# sysdeps configure fragments may set these with files to be linked below.
	405	libc_link_dests=
	406	libc_link_sources=
	407
	408	# Iterate over all the sysdep directories we will use, running their
	409	# configure fragments, and looking for a uname implementation.
	410	uname=
	411	for dir in $sysnames; do
	412	if test -r $sysdep_dir/$dir/configure; then
	413	AC_MSG_RESULT(running configure fragment for $dir)
	414	. $sysdep_dir/$dir/configure
	415	fi
	416	if test -z "$uname"; then
	417	{ test -r $sysdep_dir/$dir/uname.c \|\| test -r $sysdep_dir/$dir/uname.S; } \
	418	&& uname=$dir
	419	fi
	420	done
	421
	422	AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
	423
	424	# If we will use the generic uname implementation, we must figure out what
	425	# it will say by examining the system, and write the results in config-name.h.
	426	if test "$uname" = generic; then
	427
	428	changequote(,)dnl
	429	uname_sysname=`echo $config_os \| sed 's/[0-9.]*$//'`
	430	changequote([,])dnl
	431	if test $uname_sysname != $config_os; then
	432	config_release=`echo $config_os \| sed s/$uname_sysname//`
	433	fi
	434	dnl
	435	AC_DEFUN(LIBC_KERNEL_ID, [dnl
	436	if test -r /vmunix; then
	437	kernel_id=`strings /vmunix \| grep UNIX`
	438	elif test -r /dynix; then
	439	kernel_id=`strings /dynix \| grep DYNIX`
	440	else
	441	kernel_id=
	442	fi
	443	])dnl
	444
b8dc6a10	445	AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
28f540f4 RM	446	AC_REQUIRE([LIBC_KERNEL_ID])dnl
	447	changequote(,)dnl
	448	kernel_release=`echo "$kernel_id" \| sed 's/^[^0-9.]\([0-9.]\).*$/\1/'`
	449	changequote([,])dnl
	450	if test x`echo "$config_release" \| sed "s/^$kernel_release//"` \
	451	!= x$config_release; then
	452	# The configuration release is a substring of the kernel release.
	453	libc_cv_uname_release=$kernel_release
	454	elif test x$config_release != x; then
	455	libc_cv_uname_release=$config_release
	456	elif test x$kernel_release != x; then
	457	libc_cv_uname_release=$kernel_release
	458	else
	459	libc_cv_uname_release=unknown
	460	fi])
28f540f4 RM	461	uname_release="$libc_cv_uname_release"
28f540f4 RM	462
b8dc6a10	463	AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
28f540f4 RM	464	AC_REQUIRE([LIBC_KERNEL_ID])dnl
	465	changequote(,)dnl
	466	kernel_version=`echo "$kernel_id" \| sed 's/^[^#]#\([0-9]\).*$/\1/'`
	467	changequote([,])dnl
	468	if test -n "$kernel_version"; then
	469	libc_cv_uname_version="$kernel_version"
	470	else
	471	libc_cv_uname_version=unknown
	472	fi])
28f540f4 RM	473	uname_version="$libc_cv_uname_version"
	474
	475	AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
	476	config_uname=config-name.h:config-name.in
	477	else
	478	# For non-generic uname, we don't need to create config-name.h at all.
	479	config_uname=
	480	fi
	481
96aa2d94 RM	482	AC_MSG_CHECKING(stdio selection)
	483	AC_SUBST(stdio)
	484	case $stdio in
	485	libio) AC_DEFINE(USE_IN_LIBIO) ;;
	486	default) stdio=stdio ;;
	487	esac
	488	AC_MSG_RESULT($stdio)
	489
28f540f4 RM	490	AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(weak)
	491	if test $gnu_ld = yes; then
	492	AC_DEFINE(HAVE_GNU_LD)
	493	fi
	494	if test $gnu_as = yes; then
	495	AC_DEFINE(HAVE_GNU_AS)
	496	fi
	497	if test $elf = yes; then
	498	AC_DEFINE(HAVE_ELF)
	499	fi
	500	if test $weak = yes; then
	501	AC_DEFINE(HAVE_WEAK_SYMBOLS)
	502	fi
	503
ff3d7ed3 RM	504	AC_SUBST(shared)
	505	if test $shared = default; then
	506	if test $gnu_ld = yes; then
	507	shared=$elf
	508	fi
	509	fi
	510	AC_SUBST(profile)
	511	AC_SUBST(omitfp)
	512
28f540f4 RM	513	if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
	514	config_makefile=
	515	else
	516	config_makefile=Makefile
	517	fi
	518
	519	AC_OUTPUT(config.make ${config_makefile} ${config_uname}, ,
	520	[echo '$config_vars' >> config.make])