#! /bin/sh

# Configuration script for the GNU C Library.

# Copyright (C) 1991, 1992 Free Software Foundation, Inc.
# This file is part of the GNU C Library.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.

# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Library General Public License for more details.

# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB.  If
# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
# Cambridge, MA 02139, USA.

#
#	Configure the GNU C Library.
#

prog="`basename $0`"

if [ $# -eq 0 -a "${ARCH-${machine}}" != "" ]; then
  set "${ARCH-${machine}}"
fi

# Default --srcdir to the directory where the script is found, 
# if a directory was specified.
srcdir=`echo $0 | sed 's|/[^/]*$||'`
if [ x$srcdir = x$0 ]; then
  srcdir=
fi

# All the standard GNU configure options are accepted but only
# --nfp, --with-gnu-ld, and --with-gnu-as are meaningful.
nfp=
gnu_ld=
gnu_as=
version=
release=
prefix=
exec_prefix=

lose=
for arg in $*; do
  if [ x$next != x ]; then
    eval "$next = \$arg"
    next=
  else
    case $arg in
     -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=* | --s=*)
	srcdir=`echo $arg | sed 's/-*s[a-z]*=//'`
	;;
     -srcdir | --srcdir | --srcdi | --srcd | --src | --sr | --s)
	next=srcdir
	;;
     -target | --target | --targe | --targ | --tar | --ta | --t)
	next=target
	;;
     -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
	target=`echo $arg | sed 's/-*t[a-z]*=//'`
	;; 

     -with-gnu-ld | --with-gnu-ld | --with-gnu-l)
	gnu_ld=--with-gnu-ld
	;;

     -gas | --gas | --ga | --g | -with-gnu-as | --with-gnu-as | -with-gnu-a)
        gnu_as=--with-gnu-as
	;;

     -nfp | --nfp | --nf | --n)
	nfp=--nfp
	;;

     -with-* | --with-*)
       ;; # ignored

     -x | --x)
       ;; # ignored

     -os-release=* | -os-releas=* | -os-relea=* | -os-rele=* | -os-rel=* \
     | -os-re=* | -os-r=* | --os-release=* | --os-releas=* | --os-relea=* \
     | --os-rele=* | --os-rel=* | --os-re=* | --os-r=*)
       release=`echo $arg | sed 's/-*os-r[a-z]*=//'`
       ;;
     -os-release | -os-releas | -os-relea | -os-rele | -os-rel \
     | -os-re | -os-r | --os-release | --os-releas | --os-relea \
     | --os-rele | --os-rel | --os-re | --os-r)
       next=release
       ;;

     -os-version=* | -os-versio=* | -os-versi=* | -os-vers=* | -os-ver=* \
     | -os-ver=* | -os-ve=* | -os-v=* | --os-version=* | --os-versio=* \
     | --os-versi=* | --os-vers=* | --os-ver=* | --os-ver=* | --os-ve=* \
     | --os-v=*)
       version=`echo $arg | sed 's/-*os-v[a-z]*=//'`
       ;;
     -os-version | -os-versio | -os-versi | -os-vers | -os-ver \
     | -os-ver | -os-ve | -os-v |--os-version | --os-versio \
     | --os-versi | --os-vers | --os-ver | --os-ver | --os-ve | --os-v)
       next=version
       ;;

     -exec_prefix=* | --exec_prefix=* | --exec_prefi=* | --exec_pref=* | --exec_pre=* | --exec_pr=* | --exec_p=* | --exec_=* | --exec=* | --exe=* | --ex=* | --e=*)
	exec_prefix=`echo $arg | sed 's/[-a-z_]*=//'`
	;;
     -exec_prefix | --exec_prefix | --exec_prefi | --exec_pref | --exec_pre | --exec_pr | --exec_p | --exec_ | --exec | --exe | --ex | --e)
	next=exec_prefix
	;;

     -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
	prefix=`echo $arg | sed 's/[-a-z_]*=//'`
	;;
     -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
	next=prefix
	;;

     -*)
	echo "Invalid option \`$arg'" 1>&2
	lose=yes
	;;
     *)
	if [ ! "$target" ]; then
	  target=$arg
	else
	  lose=yes
	fi
	;;
    esac
  fi
done

if [ x$lose = yes -o ! "$target" ]; then
  echo "Usage: $prog [--srcdir=DIR] [--nfp] [--with-gnu-ld] TARGET" >&2
  if [ -r config.status ]; then
    cat config.status >&2
  fi
  exit 1
fi

# Find the source files, if location was not specified.
if [ ! "$srcdir" ]; then
  if [ -r features.h ]; then
    srcdir=.
  elif [ -r ../features.h ]; then
    srcdir=..
  else
    echo "$prog: Can't find library sources in \`.' or \`..'" >&2
    echo "Use the \`--srcdir' option to specify where to find the source." >&2
    exit 1
  fi
elif [ ! -r $srcdir/features.h ]; then
  echo "$prog: Can't find library sources in \`$srcdir'" >&2
  exit 1
fi

# Canonicalize the configuration name.
config=`$srcdir/config.sub $target`
if [ ! "$config" ]; then
  # config.sub has written an error message.
  exit 1
fi

sysdep_dir=$srcdir/sysdeps

# machine-vendor-os
eval "`echo $config | \
       sed 's/^\(.*\)-\(.*\)-\(.*\)$/machine=\1 vendor=\2 os=\3/'`"

case "$os" in
gnu*)
  os=mach/hurd ;;
sunos* | ultrix* | newsos* | dynix | bsd*)
  base_os=unix/bsd ;;
linux* | sysv* | isc* | esix*)
  base_os=unix/sysv ;;
esac

case "$os" in
gnu* | linux*)
  gnu_ld=--with-gnu-ld
  gnu_as=--with-gnu-as
esac

# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4.
tail=$os
ostry=$os
while o=`echo $tail | sed 's/\.[^.]*$//'`; [ $o != $tail ]; do
  ostry="$ostry /$o"
  tail=$o
done  

sysnames=
if [ "$base_os" ]; then
  base=/$base_os
fi
for b in $base ''; do
  for v in /$vendor ''; do
    for o in /$ostry ''; do
      for m in /$machine ''; do
        if [ -d $sysdep_dir$b$v$o$m ]; then
          sysnames="$sysnames $b$v$o$m"
	  [ "$o" -o "$b" ] && os_used=t
	  [ "$m" ] && machine_used=t
	fi
      done
    done
  done
done

if [ ! "$os_used" -a "$os" != none ]; then
  echo Operating system $os is not supported. >&2
  exit 1
fi
if [ ! "$machine_used" -a "$machine" != none ]; then
  echo The $machine is not supported. >&2
  exit 1
fi

sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`"

if [ ! "$nfp" -a -d $sysdep_dir/$machine/fpu ]; then
  sysnames="${machine}/fpu $sysnames"
fi

rm -f sysdirs
echo $sysnames > Sysnames

cat - Sysnames <<END
Configuring the GNU C Library for \`${config}'.
Using system-dependent files from directories:
END

export sysdep_dir
for dir in `$srcdir/find-sysdirs < Sysnames`; do
  if [ -r $sysdep_dir/$dir/uname.c -o -r $sysdep_dir/$dir/uname.S ]; then
    uname=$dir
    break
  fi
done
if [ $uname = generic ]; then
  if [ ! "$release" -o ! "$version" ] && [ -r /vmunix ]; then
    kernel_id=`strings /vmunix | grep UNIX`
    kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
    kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
  else
    kernel_release=
    kernel_version=
  fi

  sysname=`echo $os | sed 's/[0-9.]*$//'`
  if [ $sysname != $os ]; then
    config_release=`echo $os | sed s/$sysname//`
  fi

  if [ "$release" ]; then
    # All is well.
    true
  elif [ x`echo "$config_release" | sed "s/^$kernel_release//"` \
       != x$config_release ]; then
    # The configuration release is a substring of the kernel release.
    release=$kernel_release
  elif [ x$config_release != x ]; then
    release=$config_release
  elif [ x$kernel_release != x ]; then
    release=$kernel_release
  else
    cat <<END
I don't know what release of $sysname you are using.  Please enter the
release number now.  This information is used only for the \`uname' function,
so it is not critical.
END
    read release
    if [ ! "$release" ]; then
      release=unknown
    fi
  fi

  if [ "$version" ]; then
    # All is well.
    true
  elif [ ! "$kernel_version" ]; then
    cat <<END
I don't know what version of $sysname $release you are using.  Please enter
the version number now.  This information is used only for the uname
function, so it is not critical.
END
    read version
    if [ ! "$version" ]; then
      version=unknown
    fi
  else
    version=$kernel_version
  fi

  cat > config-name.h <<END
/* This file was generated automatically by configure.  Do not edit.
   This is used by the generic uname function.  */
#define UNAME_SYSNAME "${sysname}"
#define UNAME_RELEASE "${release}"
#define UNAME_VERSION "${version}"
#define UNAME_MACHINE "${machine}-${vendor}"
END

  system_name="$sysname $release version $version on $vendor $machine"
else
  # Not generic uname.  We don't need config-name.h at all.
  system_name=$config
fi

(
  echo '# This file was generated automatically by configure.  Do not edit.'
  if [ "$gnu_ld" ]; then
    echo 'gnu_ld = -DHAVE_GNU_LD'
  fi
  if [ "$gnu_as" ]; then
    echo 'gnu_as = -DHAVE_GNU_AS'
  fi
  if [ "$prefix" ]; then
    echo "prefix = ${prefix}"
  fi
  if [ "$exec_prefix" ]; then
    echo "exec_prefix = ${exec_prefix}"
  fi
) > config.make

switches=
if [ "$gnu_as" ]; then
  switches="$switches --with-gnu-as"
fi
if [ "$gnu_ld" ]; then
  switches="$switches --with-gnu-ld"
fi
if [ "$exec_prefix" ]; then
  switches="$switches --exec_prefix=$exec_prefix"
fi
if [ "$prefix" ]; then
  switches="$switches --prefix=$prefix"
fi
if [ "$release" ]; then
  switches="$switches --os-release='$release'"
fi
if [ "$version" ]; then
  switches="$switches --os-version='$version'"
fi

cat > config.status <<END
#!/bin/sh
# This file was generated automatically by configure.  Do not edit.
# The GNU C library was configured in `pwd` for
# $system_name as follows:
$0 $config --srcdir=$srcdir $switches
END

if [ $srcdir != . ]; then
  if [ $srcdir = .. ]; then
    cwd=`pwd`
    objdir=`basename $cwd`
  else
    objdir=`pwd`
  fi
  cat > Makefile <<END
# This file was generated automatically by configure.  Do not edit.
srcdir = $srcdir

all .DEFAULT:
	\$(MAKE) -C \$(srcdir) ARCH=$objdir \$@
END

echo "# Wrote Makefile in `pwd`." >> config.status
fi
chmod a+x config.status

exit 0