Fresh Fish 1/FFMCD01.bin/useful/dist/gnu/diffutils/diffutils-2.4-amiga/configure

Text File | 1993-09-11 | 37.2 KB | 1,402 lines

#!/bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated automatically using autoconf.
# Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.

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

# This program 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 General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

# Usage: configure [--srcdir=DIR] [--host=HOST] [--gas] [--nfp] [--no-create]
#        [--prefix=PREFIX] [--exec-prefix=PREFIX] [--with-PACKAGE[=VALUE]]
# Ignores all args except --srcdir, --prefix, --exec-prefix, --no-create, and
# --with-PACKAGE[=VALUE] unless this script has special code to handle it.


for arg
do
  # Handle --exec-prefix with a space before the argument.
  if test x$next_exec_prefix = xyes; then exec_prefix=$arg; next_exec_prefix=
  # Handle --host with a space before the argument.
  elif test x$next_host = xyes; then next_host=
  # Handle --prefix with a space before the argument.
  elif test x$next_prefix = xyes; then prefix=$arg; next_prefix=
  # Handle --srcdir with a space before the argument.
  elif test x$next_srcdir = xyes; then srcdir=$arg; next_srcdir=
  else
    case $arg in
     # For backward compatibility, also recognize exact -exec_prefix.
     -exec-prefix=* | --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-prefix | --exec-prefi | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- | --exec | --exe | --ex | --e)
    next_exec_prefix=yes ;;

     -gas | --gas | --ga | --g) ;;

     -host=* | --host=* | --hos=* | --ho=* | --h=*) ;;
     -host | --host | --hos | --ho | --h)
    next_host=yes ;;

     -nfp | --nfp | --nf) ;;

     -no-create | --no-create | --no-creat | --no-crea | --no-cre | --no-cr | --no-c | --no- | --no)
        no_create=1 ;;

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

     -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=* | --s=*)
    srcdir=`echo $arg | sed 's/[-a-z_]*=//'` ;;
     -srcdir | --srcdir | --srcdi | --srcd | --src | --sr | --s)
    next_srcdir=yes ;;

     -with-* | --with-*)
       package=`echo $arg|sed -e 's/-*with-//' -e 's/=.*//'`
       # Reject names that aren't valid shell variable names.
       if test -n "`echo $package| sed 's/[-a-zA-Z0-9_]//g'`"; then
         echo "configure: $package: invalid package name" >&2; exit 1
       fi
       package=`echo $package| sed 's/-/_/g'`
       case "$arg" in
         *=*) val="`echo $arg|sed 's/[^=]*=//'`" ;;
         *) val=1 ;;
       esac
       eval "with_$package='$val'" ;;

     -v | -verbose | --verbose | --verbos | --verbo | --verb | --ver | --ve | --v)
       verbose=yes ;;

     *) ;;
    esac
  fi
done

trap 'rm -fr conftest* core; exit 1' 1 3 15

# NLS nuisances.
# These must not be set unconditionally because not all systems understand
# e.g. LANG=C (notably SCO).
if test "${LC_ALL+set}" = 'set' ; then LC_ALL=C; export LC_ALL; fi
if test "${LANG+set}"   = 'set' ; then LANG=C;   export LANG;   fi

rm -f conftest* confdefs.h
> confdefs.h
compile='${CC-cc} $CFLAGS conftest.c -o conftest $LIBS >/dev/null 2>&1'

# A filename unique to this package, relative to the directory that
# configure is in, which we can look for to find out if srcdir is correct.
unique_file=diff.h

# Find the source files, if location was not specified.
if test -z "$srcdir"; then
  srcdirdefaulted=yes
  # Try the directory containing this script, then `..'.
  prog=$0
  confdir=`echo $prog|sed 's%/[^/][^/]*$%%'`
  test "X$confdir" = "X$prog" && confdir=.
  srcdir=$confdir
  if test ! -r $srcdir/$unique_file; then
    srcdir=..
  fi
fi
if test ! -r $srcdir/$unique_file; then
  if test x$srcdirdefaulted = xyes; then
    echo "configure: Can not find sources in \`${confdir}' or \`..'." 1>&2
  else
    echo "configure: Can not find sources in \`${srcdir}'." 1>&2
  fi
  exit 1
fi
# Preserve a srcdir of `.' to avoid automounter screwups with pwd.
# But we can't avoid them for `..', to make subdirectories work.
case $srcdir in
  .|/*|~*) ;;
  *) srcdir=`cd $srcdir; pwd` ;; # Make relative path absolute.
esac

# Save the original args to write them into config.status later.
configure_args="$*"


if test -z "$CC"; then
  # Extract the first word of `gcc', so it can be a program name with args.
  set dummy gcc; word=$2
  echo checking for $word
  IFS="${IFS=     }"; saveifs="$IFS"; IFS="${IFS}:"
  for dir in $PATH; do
    test -z "$dir" && dir=.
    if test -f $dir/$word; then
      CC="gcc"
      break
    fi
  done
  IFS="$saveifs"
fi
test -z "$CC" && CC="cc"
test -n "$CC" && test -n "$verbose" && echo "    setting CC to $CC"

# Find out if we are using GNU C, under whatever name.
cat > conftest.c <<EOF
#ifdef __GNUC__
  yes
#endif
EOF
${CC-cc} -E conftest.c > conftest.out 2>&1
if egrep yes conftest.out >/dev/null 2>&1; then
  GCC=1 # For later tests.
fi
rm -f conftest*

echo checking how to run the C preprocessor
if test -z "$CPP"; then
  # This must be in double quotes, not single quotes, because CPP may get
  # substituted into the Makefile and ``${CC-cc}'' will simply confuse
  # make.  It must be expanded now.
  CPP="${CC-cc} -E"
  cat > conftest.c <<EOF
#include "confdefs.h"
#include <stdio.h>
Syntax Error
EOF
err=`eval "($CPP conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  :
else
  CPP=/lib/cpp
fi
rm -f conftest*
fi
test ".${verbose}" != "." && echo "    setting CPP to $CPP"

# Make sure to not get the incompatible SysV /etc/install and
# /usr/sbin/install, which might be in PATH before a BSD-like install,
# or the SunOS /usr/etc/install directory, or the AIX /bin/install,
# or the AFS install, which mishandles nonexistent args, or
# /usr/ucb/install on SVR4, which tries to use the nonexistent group
# `staff'.  On most BSDish systems install is in /usr/bin, not /usr/ucb
# anyway.  Sigh.
if test "z${INSTALL}" = "z" ; then
  echo checking for install
  IFS="${IFS=     }"; saveifs="$IFS"; IFS="${IFS}:"
  for dir in $PATH; do
    test -z "$dir" && dir=.
    case $dir in
    /etc|/usr/sbin|/usr/etc|/usr/afsws/bin|/usr/ucb) ;;
    *)
      if test -f $dir/installbsd; then
    INSTALL="$dir/installbsd -c" # OSF1
    INSTALL_PROGRAM='$(INSTALL)'
    INSTALL_DATA='$(INSTALL) -m 644'
    break
      fi
      if test -f $dir/install; then
    if grep dspmsg $dir/install >/dev/null 2>&1; then
      : # AIX
    else
      INSTALL="$dir/install -c"
      INSTALL_PROGRAM='$(INSTALL)'
      INSTALL_DATA='$(INSTALL) -m 644'
      break
    fi
      fi
      ;;
    esac
  done
  IFS="$saveifs"
fi
INSTALL=${INSTALL-cp}
test -n "$verbose" && echo "    setting INSTALL to $INSTALL"
INSTALL_PROGRAM=${INSTALL_PROGRAM-'$(INSTALL)'}
test -n "$verbose" && echo "    setting INSTALL_PROGRAM to $INSTALL_PROGRAM"
INSTALL_DATA=${INSTALL_DATA-'$(INSTALL)'}
test -n "$verbose" && echo "    setting INSTALL_DATA to $INSTALL_DATA"

echo checking for minix/config.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <minix/config.h>
EOF
err=`eval "($CPP conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  MINIX=1
fi
rm -f conftest*

# The Minix shell can't assign to the same variable on the same line!
if test -n "$MINIX"; then

{
test -n "$verbose" && \
echo "    defining _POSIX_SOURCE"
echo "#define" _POSIX_SOURCE 1 >> confdefs.h
DEFS="$DEFS -D_POSIX_SOURCE=1"
SEDDEFS="${SEDDEFS}\${SEDdA}_POSIX_SOURCE\${SEDdB}_POSIX_SOURCE\${SEDdC}1\${SEDdD}
\${SEDuA}_POSIX_SOURCE\${SEDuB}_POSIX_SOURCE\${SEDuC}1\${SEDuD}
\${SEDeA}_POSIX_SOURCE\${SEDeB}_POSIX_SOURCE\${SEDeC}1\${SEDeD}
"
}


{
test -n "$verbose" && \
echo "    defining" _POSIX_1_SOURCE to be 2
echo "#define" _POSIX_1_SOURCE 2 >> confdefs.h
DEFS="$DEFS -D_POSIX_1_SOURCE=2"
SEDDEFS="${SEDDEFS}\${SEDdA}_POSIX_1_SOURCE\${SEDdB}_POSIX_1_SOURCE\${SEDdC}2\${SEDdD}
\${SEDuA}_POSIX_1_SOURCE\${SEDuB}_POSIX_1_SOURCE\${SEDuC}2\${SEDuD}
\${SEDeA}_POSIX_1_SOURCE\${SEDeB}_POSIX_1_SOURCE\${SEDeC}2\${SEDeD}
"
}


{
test -n "$verbose" && \
echo "    defining _MINIX"
echo "#define" _MINIX 1 >> confdefs.h
DEFS="$DEFS -D_MINIX=1"
SEDDEFS="${SEDDEFS}\${SEDdA}_MINIX\${SEDdB}_MINIX\${SEDdC}1\${SEDdD}
\${SEDuA}_MINIX\${SEDuB}_MINIX\${SEDuC}1\${SEDuD}
\${SEDeA}_MINIX\${SEDeB}_MINIX\${SEDeC}1\${SEDeD}
"
}

fi

echo checking for POSIXized ISC
if test -d /etc/conf/kconfig.d &&
  grep _POSIX_VERSION /usr/include/sys/unistd.h >/dev/null 2>&1
then
  ISC=1 # If later tests want to check for ISC.

{
test -n "$verbose" && \
echo "    defining _POSIX_SOURCE"
echo "#define" _POSIX_SOURCE 1 >> confdefs.h
DEFS="$DEFS -D_POSIX_SOURCE=1"
SEDDEFS="${SEDDEFS}\${SEDdA}_POSIX_SOURCE\${SEDdB}_POSIX_SOURCE\${SEDdC}1\${SEDdD}
\${SEDuA}_POSIX_SOURCE\${SEDuB}_POSIX_SOURCE\${SEDuC}1\${SEDuD}
\${SEDeA}_POSIX_SOURCE\${SEDeB}_POSIX_SOURCE\${SEDeC}1\${SEDeD}
"
}

  if test -n "$GCC"; then
    CC="$CC -posix"
  else
    CC="$CC -Xp"
  fi
fi

echo checking for directory library header
dirheader=
if test -z "$dirheader"; then
  echo checking for dirent.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <dirent.h>
int main() { exit(0); }
int t() { DIR *dirp = opendir ("/"); }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining DIRENT"
echo "#define" DIRENT 1 >> confdefs.h
DEFS="$DEFS -DDIRENT=1"
SEDDEFS="${SEDDEFS}\${SEDdA}DIRENT\${SEDdB}DIRENT\${SEDdC}1\${SEDdD}
\${SEDuA}DIRENT\${SEDuB}DIRENT\${SEDuC}1\${SEDuD}
\${SEDeA}DIRENT\${SEDeB}DIRENT\${SEDeC}1\${SEDeD}
"
}
 dirheader=dirent.h
fi
rm -f conftest*
fi
if test -z "$dirheader"; then
  echo checking for sys/ndir.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <sys/ndir.h>
int main() { exit(0); }
int t() { DIR *dirp = opendir ("/"); }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining SYSNDIR"
echo "#define" SYSNDIR 1 >> confdefs.h
DEFS="$DEFS -DSYSNDIR=1"
SEDDEFS="${SEDDEFS}\${SEDdA}SYSNDIR\${SEDdB}SYSNDIR\${SEDdC}1\${SEDdD}
\${SEDuA}SYSNDIR\${SEDuB}SYSNDIR\${SEDuC}1\${SEDuD}
\${SEDeA}SYSNDIR\${SEDeB}SYSNDIR\${SEDeC}1\${SEDeD}
"
}
 dirheader=sys/ndir.h
fi
rm -f conftest*
fi
if test -z "$dirheader"; then
  echo checking for sys/dir.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <sys/dir.h>
int main() { exit(0); }
int t() { DIR *dirp = opendir ("/"); }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining SYSDIR"
echo "#define" SYSDIR 1 >> confdefs.h
DEFS="$DEFS -DSYSDIR=1"
SEDDEFS="${SEDDEFS}\${SEDdA}SYSDIR\${SEDdB}SYSDIR\${SEDdC}1\${SEDdD}
\${SEDuA}SYSDIR\${SEDuB}SYSDIR\${SEDuC}1\${SEDuD}
\${SEDeA}SYSDIR\${SEDeB}SYSDIR\${SEDeC}1\${SEDeD}
"
}
 dirheader=sys/dir.h
fi
rm -f conftest*
fi
if test -z "$dirheader"; then
  echo checking for ndir.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <ndir.h>
int main() { exit(0); }
int t() { DIR *dirp = opendir ("/"); }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining NDIR"
echo "#define" NDIR 1 >> confdefs.h
DEFS="$DEFS -DNDIR=1"
SEDDEFS="${SEDDEFS}\${SEDdA}NDIR\${SEDdB}NDIR\${SEDdC}1\${SEDdD}
\${SEDuA}NDIR\${SEDuB}NDIR\${SEDuC}1\${SEDuD}
\${SEDeA}NDIR\${SEDeB}NDIR\${SEDeC}1\${SEDeD}
"
}
 dirheader=ndir.h
fi
rm -f conftest*
fi

echo checking for closedir return value
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <$dirheader>
int closedir(); main() { exit(closedir(opendir(".")) != 0); }
EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  :
else

{
test -n "$verbose" && \
echo "    defining VOID_CLOSEDIR"
echo "#define" VOID_CLOSEDIR 1 >> confdefs.h
DEFS="$DEFS -DVOID_CLOSEDIR=1"
SEDDEFS="${SEDDEFS}\${SEDdA}VOID_CLOSEDIR\${SEDdB}VOID_CLOSEDIR\${SEDdC}1\${SEDdD}
\${SEDuA}VOID_CLOSEDIR\${SEDuB}VOID_CLOSEDIR\${SEDuC}1\${SEDuD}
\${SEDeA}VOID_CLOSEDIR\${SEDeB}VOID_CLOSEDIR\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*

prog='/* Ultrix mips cc rejects this.  */
typedef int charset[2]; const charset x;
/* SunOS 4.1.1 cc rejects this.  */
char const *const *ccp;
char **p;
/* AIX XL C 1.02.0.0 rejects this.
   It does not let you subtract one const X* pointer from another in an arm
   of an if-expression whose if-part is not a constant expression */
const char *g = "string";
ccp = &g + (g ? g-g : 0);
/* HPUX 7.0 cc rejects these. */
++ccp;
p = (char**) ccp;
ccp = (char const *const *) p;
{ /* SCO 3.2v4 cc rejects this.  */
  char *t;
  char const *s = 0 ? (char *) 0 : (char const *) 0;

  *t++ = 0;
}
{ /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
  int x[] = {25,17};
  const int *foo = &x[0];
  ++foo;
}
{ /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
  typedef const int *iptr;
  iptr p = 0;
  ++p;
}
{ /* AIX XL C 1.02.0.0 rejects this saying
     "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
  struct s { int j; const int *ap[3]; };
  struct s *b; b->j = 5;
}'
echo checking for working const
cat > conftest.c <<EOF
#include "confdefs.h"

int main() { exit(0); }
int t() { $prog }
EOF
if eval $compile; then
  :
else

{
test -n "$verbose" && \
echo "    defining" const to be empty
echo "#define" const  >> confdefs.h
DEFS="$DEFS -Dconst="
SEDDEFS="${SEDDEFS}\${SEDdA}const\${SEDdB}const\${SEDdC}\${SEDdD}
\${SEDuA}const\${SEDuB}const\${SEDuC}\${SEDuD}
\${SEDeA}const\${SEDeB}const\${SEDeC}\${SEDeD}
"
}

fi
rm -f conftest*

echo checking for ANSI C header files
cat > conftest.c <<EOF
#include "confdefs.h"
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <float.h>
EOF
err=`eval "($CPP conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then
  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
echo '#include "confdefs.h"
#include <string.h>' > conftest.c
eval "$CPP conftest.c > conftest.out 2>&1"
if egrep "memchr" conftest.out >/dev/null 2>&1; then
  # SGI's /bin/cc from Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
cat > conftest.c <<EOF
#include "confdefs.h"
#include <ctype.h>
#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
#define XOR(e,f) (((e) && !(f)) || (!(e) && (f)))
int main () { int i; for (i = 0; i < 256; i++)
if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
exit (0); }

EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then

{
test -n "$verbose" && \
echo "    defining STDC_HEADERS"
echo "#define" STDC_HEADERS 1 >> confdefs.h
DEFS="$DEFS -DSTDC_HEADERS=1"
SEDDEFS="${SEDDEFS}\${SEDdA}STDC_HEADERS\${SEDdB}STDC_HEADERS\${SEDdC}1\${SEDdD}
\${SEDuA}STDC_HEADERS\${SEDuB}STDC_HEADERS\${SEDuC}1\${SEDuD}
\${SEDeA}STDC_HEADERS\${SEDeB}STDC_HEADERS\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*
fi
rm -f conftest*

fi
rm -f conftest*

echo checking for unistd.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <unistd.h>
EOF
err=`eval "($CPP conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then

{
test -n "$verbose" && \
echo "    defining HAVE_UNISTD_H"
echo "#define" HAVE_UNISTD_H 1 >> confdefs.h
DEFS="$DEFS -DHAVE_UNISTD_H=1"
SEDDEFS="${SEDDEFS}\${SEDdA}HAVE_UNISTD_H\${SEDdB}HAVE_UNISTD_H\${SEDdC}1\${SEDdD}
\${SEDuA}HAVE_UNISTD_H\${SEDuB}HAVE_UNISTD_H\${SEDuC}1\${SEDuD}
\${SEDeA}HAVE_UNISTD_H\${SEDeB}HAVE_UNISTD_H\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*

echo checking for pid_t in sys/types.h
echo '#include "confdefs.h"
#include <sys/types.h>' > conftest.c
eval "$CPP conftest.c > conftest.out 2>&1"
if egrep "pid_t" conftest.out >/dev/null 2>&1; then
  :
else

{
test -n "$verbose" && \
echo "    defining" pid_t to be int
echo "#define" pid_t int >> confdefs.h
DEFS="$DEFS -Dpid_t=int"
SEDDEFS="${SEDDEFS}\${SEDdA}pid_t\${SEDdB}pid_t\${SEDdC}int\${SEDdD}
\${SEDuA}pid_t\${SEDuB}pid_t\${SEDuC}int\${SEDuD}
\${SEDeA}pid_t\${SEDeB}pid_t\${SEDeC}int\${SEDeD}
"
}

fi
rm -f conftest*

echo checking for return type of signal handlers
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <signal.h>
#ifdef signal
#undef signal
#endif
extern void (*signal ()) ();
int main() { exit(0); }
int t() { int i; }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining" RETSIGTYPE to be void
echo "#define" RETSIGTYPE void >> confdefs.h
DEFS="$DEFS -DRETSIGTYPE=void"
SEDDEFS="${SEDDEFS}\${SEDdA}RETSIGTYPE\${SEDdB}RETSIGTYPE\${SEDdC}void\${SEDdD}
\${SEDuA}RETSIGTYPE\${SEDuB}RETSIGTYPE\${SEDuC}void\${SEDuD}
\${SEDeA}RETSIGTYPE\${SEDeB}RETSIGTYPE\${SEDeC}void\${SEDeD}
"
}

else

{
test -n "$verbose" && \
echo "    defining" RETSIGTYPE to be int
echo "#define" RETSIGTYPE int >> confdefs.h
DEFS="$DEFS -DRETSIGTYPE=int"
SEDDEFS="${SEDDEFS}\${SEDdA}RETSIGTYPE\${SEDdB}RETSIGTYPE\${SEDdC}int\${SEDdD}
\${SEDuA}RETSIGTYPE\${SEDuB}RETSIGTYPE\${SEDuC}int\${SEDuD}
\${SEDeA}RETSIGTYPE\${SEDeB}RETSIGTYPE\${SEDeC}int\${SEDeD}
"
}

fi
rm -f conftest*


for func in dup2 memchr sigaction strerror waitpid
do
trfunc=HAVE_`echo $func | tr '[a-z]' '[A-Z]'`
echo checking for ${func}
cat > conftest.c <<EOF
#include "confdefs.h"
#include <ctype.h>
int main() { exit(0); }
int t() {
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub_${func}) || defined (__stub___${func})
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char ${func}(); ${func}();
#endif
 }
EOF
if eval $compile; then
  {
test -n "$verbose" && \
echo "    defining ${trfunc}"
echo "#define" ${trfunc} 1 >> confdefs.h
DEFS="$DEFS -D${trfunc}=1"
SEDDEFS="${SEDDEFS}\${SEDdA}${trfunc}\${SEDdB}${trfunc}\${SEDdC}1\${SEDdD}
\${SEDuA}${trfunc}\${SEDuB}${trfunc}\${SEDuC}1\${SEDuD}
\${SEDeA}${trfunc}\${SEDeB}${trfunc}\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*
done

for hdr in fcntl.h limits.h stdlib.h string.h sys/wait.h time.h
do
trhdr=HAVE_`echo $hdr | tr '[a-z]./' '[A-Z]__'`
echo checking for ${hdr}
cat > conftest.c <<EOF
#include "confdefs.h"
#include <${hdr}>
EOF
err=`eval "($CPP conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then

{
test -n "$verbose" && \
echo "    defining ${trhdr}"
echo "#define" ${trhdr} 1 >> confdefs.h
DEFS="$DEFS -D${trhdr}=1"
SEDDEFS="${SEDDEFS}\${SEDdA}${trhdr}\${SEDdB}${trhdr}\${SEDdC}1\${SEDdD}
\${SEDuA}${trhdr}\${SEDuB}${trhdr}\${SEDuC}1\${SEDuD}
\${SEDeA}${trhdr}\${SEDeB}${trhdr}\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*
done

echo checking for vfork.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <vfork.h>
EOF
err=`eval "($CPP conftest.c >/dev/null) 2>&1"`
if test -z "$err"; then

{
test -n "$verbose" && \
echo "    defining HAVE_VFORK_H"
echo "#define" HAVE_VFORK_H 1 >> confdefs.h
DEFS="$DEFS -DHAVE_VFORK_H=1"
SEDDEFS="${SEDDEFS}\${SEDdA}HAVE_VFORK_H\${SEDdB}HAVE_VFORK_H\${SEDdC}1\${SEDdD}
\${SEDuA}HAVE_VFORK_H\${SEDuB}HAVE_VFORK_H\${SEDuC}1\${SEDuD}
\${SEDeA}HAVE_VFORK_H\${SEDeB}HAVE_VFORK_H\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*

echo checking for working vfork
echo checking for return type of signal handlers
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <signal.h>
#ifdef signal
#undef signal
#endif
extern void (*signal ()) ();
int main() { exit(0); }
int t() { int i; }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining" RETSIGTYPE to be void
echo "#define" RETSIGTYPE void >> confdefs.h
DEFS="$DEFS -DRETSIGTYPE=void"
SEDDEFS="${SEDDEFS}\${SEDdA}RETSIGTYPE\${SEDdB}RETSIGTYPE\${SEDdC}void\${SEDdD}
\${SEDuA}RETSIGTYPE\${SEDuB}RETSIGTYPE\${SEDuC}void\${SEDuD}
\${SEDeA}RETSIGTYPE\${SEDeB}RETSIGTYPE\${SEDeC}void\${SEDeD}
"
}

else

{
test -n "$verbose" && \
echo "    defining" RETSIGTYPE to be int
echo "#define" RETSIGTYPE int >> confdefs.h
DEFS="$DEFS -DRETSIGTYPE=int"
SEDDEFS="${SEDDEFS}\${SEDdA}RETSIGTYPE\${SEDdB}RETSIGTYPE\${SEDdC}int\${SEDdD}
\${SEDuA}RETSIGTYPE\${SEDuB}RETSIGTYPE\${SEDuC}int\${SEDuD}
\${SEDeA}RETSIGTYPE\${SEDeB}RETSIGTYPE\${SEDeC}int\${SEDeD}
"
}

fi
rm -f conftest*



cat > conftest.c <<EOF
#include "confdefs.h"
/* Thanks to Paul Eggert for this test.  */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
static int signalled;
static RETSIGTYPE catch (s) int s; { signalled = 1; }
main() {
  pid_t parent = getpid ();
  pid_t child;

  signal (SIGINT, catch);

  child = vfork ();

  if (child == 0) {
    /* On sparc systems, changes by the child to local and incoming
       argument registers are propagated back to the parent.
       The compiler is told about this with #include <vfork.h>,
       but some compilers (e.g. gcc -O) don't grok <vfork.h>.
       Test for this by using lots of local variables, at least
       as many local variables as main has allocated so far
       including compiler temporaries.  4 locals are enough for
       gcc 1.40.3 on a sparc, but we use 8 to be safe.
       A buggy compiler should reuse the register of parent
       for one of the local variables, since it will think that
       parent can't possibly be used any more in this routine.
       Assigning to the local variable will thus munge parent
       in the parent process.  */
    pid_t
      p = getpid(), p1 = getpid(), p2 = getpid(), p3 = getpid(),
      p4 = getpid(), p5 = getpid(), p6 = getpid(), p7 = getpid();
    /* Convince the compiler that p..p7 are live; otherwise, it might
       use the same hardware register for all 8 local variables.  */
    if (p != p1 || p != p2 || p != p3 || p != p4
    || p != p5 || p != p6 || p != p7)
      _exit(1);

    /* On some systems (e.g. SunOS 5.2), if the parent is catching
       a signal, the child ignores the signal before execing,
       and the parent later receives that signal, the parent dumps core.
       Test for this by ignoring SIGINT in the child.  */
    signal (SIGINT, SIG_IGN);

    /* On some systems (e.g. IRIX 3.3),
       vfork doesn't separate parent from child file descriptors.
       If the child closes a descriptor before it execs or exits,
       this munges the parent's descriptor as well.
       Test for this by closing stdout in the child.  */
    _exit(close(fileno(stdout)) != 0);
  } else {
    int status;
    struct stat st;

    while (wait(&status) != child)
      ;
    exit(
     /* Was there some problem with vforking?  */
     child < 0

     /* Did the child fail?  (This shouldn't happen.)  */
     || status

     /* Did the vfork/compiler bug occur?  */
     || parent != getpid()

     /* Did the signal handling bug occur?  */
     || kill(parent, SIGINT) != 0
     || signalled != 1

     /* Did the file descriptor bug occur?  */
     || fstat(fileno(stdout), &st) != 0
     );
  }
}
EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  :
else

{
test -n "$verbose" && \
echo "    defining" vfork to be fork
echo "#define" vfork fork >> confdefs.h
DEFS="$DEFS -Dvfork=fork"
SEDDEFS="${SEDDEFS}\${SEDdA}vfork\${SEDdB}vfork\${SEDdC}fork\${SEDdD}
\${SEDuA}vfork\${SEDuB}vfork\${SEDuC}fork\${SEDuD}
\${SEDeA}vfork\${SEDeB}vfork\${SEDeC}fork\${SEDeD}
"
}

fi
rm -f conftest*

echo checking for vprintf
cat > conftest.c <<EOF
#include "confdefs.h"

int main() { exit(0); }
int t() { vprintf(); }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining HAVE_VPRINTF"
echo "#define" HAVE_VPRINTF 1 >> confdefs.h
DEFS="$DEFS -DHAVE_VPRINTF=1"
SEDDEFS="${SEDDEFS}\${SEDdA}HAVE_VPRINTF\${SEDdB}HAVE_VPRINTF\${SEDdC}1\${SEDdD}
\${SEDuA}HAVE_VPRINTF\${SEDuB}HAVE_VPRINTF\${SEDuC}1\${SEDuD}
\${SEDeA}HAVE_VPRINTF\${SEDeB}HAVE_VPRINTF\${SEDeC}1\${SEDeD}
"
}

else
  vprintf_missing=1
fi
rm -f conftest*

if test -n "$vprintf_missing"; then
echo checking for _doprnt
cat > conftest.c <<EOF
#include "confdefs.h"

int main() { exit(0); }
int t() { _doprnt(); }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining HAVE_DOPRNT"
echo "#define" HAVE_DOPRNT 1 >> confdefs.h
DEFS="$DEFS -DHAVE_DOPRNT=1"
SEDDEFS="${SEDDEFS}\${SEDdA}HAVE_DOPRNT\${SEDdB}HAVE_DOPRNT\${SEDdC}1\${SEDdD}
\${SEDuA}HAVE_DOPRNT\${SEDuB}HAVE_DOPRNT\${SEDuC}1\${SEDuD}
\${SEDeA}HAVE_DOPRNT\${SEDeB}HAVE_DOPRNT\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*

fi

# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments.  Useless!
echo checking for working alloca.h
cat > conftest.c <<EOF
#include "confdefs.h"
#include <alloca.h>
int main() { exit(0); }
int t() { char *p = alloca(2 * sizeof(int)); }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining HAVE_ALLOCA_H"
echo "#define" HAVE_ALLOCA_H 1 >> confdefs.h
DEFS="$DEFS -DHAVE_ALLOCA_H=1"
SEDDEFS="${SEDDEFS}\${SEDdA}HAVE_ALLOCA_H\${SEDdB}HAVE_ALLOCA_H\${SEDdC}1\${SEDdD}
\${SEDuA}HAVE_ALLOCA_H\${SEDuB}HAVE_ALLOCA_H\${SEDuC}1\${SEDuD}
\${SEDeA}HAVE_ALLOCA_H\${SEDeB}HAVE_ALLOCA_H\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*

decl="#ifdef __GNUC__
#define alloca __builtin_alloca
#else
#if HAVE_ALLOCA_H
#include <alloca.h>
#else
#ifdef _AIX
 #pragma alloca
#else
char *alloca ();
#endif
#endif
#endif
"
echo checking for alloca
cat > conftest.c <<EOF
#include "confdefs.h"
$decl
int main() { exit(0); }
int t() { char *p = (char *) alloca(1); }
EOF
if eval $compile; then
  :
else
  alloca_missing=1
cat > conftest.c <<EOF
#include "confdefs.h"

#if defined(CRAY) && ! defined(CRAY2)
winnitude
#else
lossage
#endif

EOF
eval "$CPP conftest.c > conftest.out 2>&1"
if egrep "winnitude" conftest.out >/dev/null 2>&1; then
  echo checking for _getb67
cat > conftest.c <<EOF
#include "confdefs.h"
#include <ctype.h>
int main() { exit(0); }
int t() {
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub__getb67) || defined (__stub____getb67)
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char _getb67(); _getb67();
#endif
 }
EOF
if eval $compile; then
  {
test -n "$verbose" && \
echo "    defining" CRAY_STACKSEG_END to be _getb67
echo "#define" CRAY_STACKSEG_END _getb67 >> confdefs.h
DEFS="$DEFS -DCRAY_STACKSEG_END=_getb67"
SEDDEFS="${SEDDEFS}\${SEDdA}CRAY_STACKSEG_END\${SEDdB}CRAY_STACKSEG_END\${SEDdC}_getb67\${SEDdD}
\${SEDuA}CRAY_STACKSEG_END\${SEDuB}CRAY_STACKSEG_END\${SEDuC}_getb67\${SEDuD}
\${SEDeA}CRAY_STACKSEG_END\${SEDeB}CRAY_STACKSEG_END\${SEDeC}_getb67\${SEDeD}
"
}

else
  echo checking for GETB67
cat > conftest.c <<EOF
#include "confdefs.h"
#include <ctype.h>
int main() { exit(0); }
int t() {
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub_GETB67) || defined (__stub___GETB67)
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char GETB67(); GETB67();
#endif
 }
EOF
if eval $compile; then
  {
test -n "$verbose" && \
echo "    defining" CRAY_STACKSEG_END to be GETB67
echo "#define" CRAY_STACKSEG_END GETB67 >> confdefs.h
DEFS="$DEFS -DCRAY_STACKSEG_END=GETB67"
SEDDEFS="${SEDDEFS}\${SEDdA}CRAY_STACKSEG_END\${SEDdB}CRAY_STACKSEG_END\${SEDdC}GETB67\${SEDdD}
\${SEDuA}CRAY_STACKSEG_END\${SEDuB}CRAY_STACKSEG_END\${SEDuC}GETB67\${SEDuD}
\${SEDeA}CRAY_STACKSEG_END\${SEDeB}CRAY_STACKSEG_END\${SEDeC}GETB67\${SEDeD}
"
}

else
  echo checking for getb67
cat > conftest.c <<EOF
#include "confdefs.h"
#include <ctype.h>
int main() { exit(0); }
int t() {
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub_getb67) || defined (__stub___getb67)
choke me
#else
/* Override any gcc2 internal prototype to avoid an error.  */
extern char getb67(); getb67();
#endif
 }
EOF
if eval $compile; then
  {
test -n "$verbose" && \
echo "    defining" CRAY_STACKSEG_END to be getb67
echo "#define" CRAY_STACKSEG_END getb67 >> confdefs.h
DEFS="$DEFS -DCRAY_STACKSEG_END=getb67"
SEDDEFS="${SEDDEFS}\${SEDdA}CRAY_STACKSEG_END\${SEDdB}CRAY_STACKSEG_END\${SEDdC}getb67\${SEDdD}
\${SEDuA}CRAY_STACKSEG_END\${SEDuB}CRAY_STACKSEG_END\${SEDuC}getb67\${SEDuD}
\${SEDeA}CRAY_STACKSEG_END\${SEDeB}CRAY_STACKSEG_END\${SEDeC}getb67\${SEDeD}
"
}

fi
rm -f conftest*

fi
rm -f conftest*

fi
rm -f conftest*

fi
rm -f conftest*


fi
rm -f conftest*

if test -n "$alloca_missing"; then
  # The SVR3 libPW and SVR4 libucb both contain incompatible functions
  # that cause trouble.  Some versions do not even contain alloca or
  # contain a buggy version.  If you still want to use their alloca,
  # use ar to extract alloca.o from them instead of compiling alloca.c.
  ALLOCA=alloca.o

{
test -n "$verbose" && \
echo "    defining C_ALLOCA"
echo "#define" C_ALLOCA 1 >> confdefs.h
DEFS="$DEFS -DC_ALLOCA=1"
SEDDEFS="${SEDDEFS}\${SEDdA}C_ALLOCA\${SEDdB}C_ALLOCA\${SEDdC}1\${SEDdD}
\${SEDuA}C_ALLOCA\${SEDuB}C_ALLOCA\${SEDuC}1\${SEDuD}
\${SEDeA}C_ALLOCA\${SEDeB}C_ALLOCA\${SEDeC}1\${SEDeD}
"
}


  echo 'checking stack direction for C alloca'
  echo checking whether cross-compiling
# If we cannot run a trivial program, we must be cross compiling.
cat > conftest.c <<EOF
#include "confdefs.h"
main(){exit(0);}
EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then
  :
else
  cross_compiling=1
fi
rm -f conftest*

if test -n "$cross_compiling"
then

{
test -n "$verbose" && \
echo "    defining" STACK_DIRECTION to be 0
echo "#define" STACK_DIRECTION 0 >> confdefs.h
DEFS="$DEFS -DSTACK_DIRECTION=0"
SEDDEFS="${SEDDEFS}\${SEDdA}STACK_DIRECTION\${SEDdB}STACK_DIRECTION\${SEDdC}0\${SEDdD}
\${SEDuA}STACK_DIRECTION\${SEDuB}STACK_DIRECTION\${SEDuC}0\${SEDuD}
\${SEDeA}STACK_DIRECTION\${SEDeB}STACK_DIRECTION\${SEDeC}0\${SEDeD}
"
}

else
cat > conftest.c <<EOF
#include "confdefs.h"
find_stack_direction ()
{
  static char *addr = 0;
  auto char dummy;
  if (addr == 0)
    {
      addr = &dummy;
      return find_stack_direction ();
    }
  else
    return (&dummy > addr) ? 1 : -1;
}
main ()
{
  exit (find_stack_direction() < 0);
}
EOF
eval $compile
if test -s conftest && (./conftest; exit) 2>/dev/null; then

{
test -n "$verbose" && \
echo "    defining" STACK_DIRECTION to be 1
echo "#define" STACK_DIRECTION 1 >> confdefs.h
DEFS="$DEFS -DSTACK_DIRECTION=1"
SEDDEFS="${SEDDEFS}\${SEDdA}STACK_DIRECTION\${SEDdB}STACK_DIRECTION\${SEDdC}1\${SEDdD}
\${SEDuA}STACK_DIRECTION\${SEDuB}STACK_DIRECTION\${SEDuC}1\${SEDuD}
\${SEDeA}STACK_DIRECTION\${SEDeB}STACK_DIRECTION\${SEDeC}1\${SEDeD}
"
}

else

{
test -n "$verbose" && \
echo "    defining" STACK_DIRECTION to be -1
echo "#define" STACK_DIRECTION -1 >> confdefs.h
DEFS="$DEFS -DSTACK_DIRECTION=-1"
SEDDEFS="${SEDDEFS}\${SEDdA}STACK_DIRECTION\${SEDdB}STACK_DIRECTION\${SEDdC}-1\${SEDdD}
\${SEDuA}STACK_DIRECTION\${SEDuB}STACK_DIRECTION\${SEDuC}-1\${SEDuD}
\${SEDeA}STACK_DIRECTION\${SEDeB}STACK_DIRECTION\${SEDeC}-1\${SEDeD}
"
}

fi
fi
rm -f conftest*
fi

echo checking for st_blksize in struct stat
cat > conftest.c <<EOF
#include "confdefs.h"
#include <sys/types.h>
#include <sys/stat.h>
int main() { exit(0); }
int t() { struct stat s; s.st_blksize; }
EOF
if eval $compile; then

{
test -n "$verbose" && \
echo "    defining HAVE_ST_BLKSIZE"
echo "#define" HAVE_ST_BLKSIZE 1 >> confdefs.h
DEFS="$DEFS -DHAVE_ST_BLKSIZE=1"
SEDDEFS="${SEDDEFS}\${SEDdA}HAVE_ST_BLKSIZE\${SEDdB}HAVE_ST_BLKSIZE\${SEDdC}1\${SEDdD}
\${SEDuA}HAVE_ST_BLKSIZE\${SEDuB}HAVE_ST_BLKSIZE\${SEDuC}1\${SEDuD}
\${SEDeA}HAVE_ST_BLKSIZE\${SEDeB}HAVE_ST_BLKSIZE\${SEDeC}1\${SEDeD}
"
}

fi
rm -f conftest*

echo checking for Xenix
cat > conftest.c <<EOF
#include "confdefs.h"
#if defined(M_XENIX) && !defined(M_UNIX)
  yes
#endif

EOF
eval "$CPP conftest.c > conftest.out 2>&1"
if egrep "yes" conftest.out >/dev/null 2>&1; then
  XENIX=1
fi
rm -f conftest*

if test -n "$XENIX"; then
  LIBS="$LIBS -lx"
  case "$DEFS" in
  *SYSNDIR*) ;;
  *) LIBS="-ldir $LIBS" ;; # Make sure -ldir precedes any -lx.
  esac
fi

rm -f confdefs.h
if test -n "$prefix"; then
  test -z "$exec_prefix" && exec_prefix='${prefix}'
  prsub="s%^prefix\\([     ]*\\)=\\([     ]*\\).*$%prefix\\1=\\2$prefix%"
fi
if test -n "$exec_prefix"; then
  prsub="$prsub
s%^exec_prefix\\([     ]*\\)=\\([     ]*\\).*$%exec_prefix\\1=\\2$exec_prefix%"
fi
# Quote sed substitution magic chars in DEFS.
cat >conftest.def <<EOF
$DEFS
EOF
escape_ampersand_and_backslash='s%[&\\]%\\&%g'
DEFS=`sed "$escape_ampersand_and_backslash" <conftest.def`
rm -f conftest.def

trap 'rm -f config.status; exit 1' 1 3 15
echo creating config.status
rm -f config.status
cat > config.status <<EOF
#!/bin/sh
# Generated automatically by configure.
# Run this file to recreate the current configuration.
# This directory was configured as follows,
# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
#
# $0 $configure_args

for arg
do
  case "\$arg" in
    -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
    echo running /bin/sh $0 $configure_args
    exec /bin/sh $0 $configure_args ;;
    *) echo "Usage: config.status --recheck" 2>&1; exit 1 ;;
  esac
done

trap 'rm -fr Makefile config.h conftest*; exit 1' 1 3 15
CC='$CC'
CPP='$CPP'
INSTALL='$INSTALL'
INSTALL_PROGRAM='$INSTALL_PROGRAM'
INSTALL_DATA='$INSTALL_DATA'
ALLOCA='$ALLOCA'
LIBS='$LIBS'
srcdir='$srcdir'
prefix='$prefix'
exec_prefix='$exec_prefix'
prsub='$prsub'
EOF
cat >> config.status <<\EOF

top_srcdir=$srcdir

# Allow make-time overrides of the generated file list.
test -n "$gen_files" || gen_files="Makefile"

for file in .. $gen_files; do if test "x$file" != x..; then
  srcdir=$top_srcdir
  # Remove last slash and all that follows it.  Not all systems have dirname.
  dir=`echo $file|sed 's%/[^/][^/]*$%%'`
  if test "$dir" != "$file"; then
    test "$top_srcdir" != . && srcdir=$top_srcdir/$dir
    test ! -d $dir && mkdir $dir
  fi
  echo creating $file
  rm -f $file
  echo "# Generated automatically from `echo $file|sed 's|.*/||'`.in by configure." > $file
  sed -e "
$prsub
s%@CC@%$CC%g
s%@CPP@%$CPP%g
s%@INSTALL@%$INSTALL%g
s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
s%@INSTALL_DATA@%$INSTALL_DATA%g
s%@ALLOCA@%$ALLOCA%g
s%@LIBS@%$LIBS%g
s%@srcdir@%$srcdir%g
s%@DEFS@%-DHAVE_CONFIG_H%" $top_srcdir/${file}.in >> $file
fi; done
test -n "$gen_configs" || gen_configs="config.h"

for file in .. $gen_configs; do if test "x$file" != x..; then
echo creating $file

# These sed commands are put into SEDDEFS when defining a macro.
# They are broken into pieces to make the sed script easier to manage.
# They are passed to sed as "A NAME B NAME C VALUE D", where NAME
# is the cpp macro being defined and VALUE is the value it is being given.
# Each defining turns into a single global substitution command.
#
# SEDd sets the value in "#define NAME VALUE" lines.
SEDdA='s@^\([     ]*\)#\([     ]*define[     ][     ]*\)'
SEDdB='\([     ][     ]*\)[^     ]*@\1#\2'
SEDdC='\3'
SEDdD='@g'
# SEDu turns "#undef NAME" with trailing blanks into "#define NAME VALUE".
SEDuA='s@^\([     ]*\)#\([     ]*\)undef\([     ][     ]*\)'
SEDuB='\([     ]\)@\1#\2define\3'
SEDuC=' '
SEDuD='\4@g'
# SEDe turns "#undef NAME" without trailing blanks into "#define NAME VALUE".
SEDeA='s@^\([     ]*\)#\([     ]*\)undef\([     ][     ]*\)'
SEDeB='$@\1#\2define\3'
SEDeC=' '
SEDeD='@g'
rm -f conftest.sed
EOF
# Turn off quoting long enough to insert the sed commands.
rm -f conftest.sh
cat > conftest.sh <<EOF
$SEDDEFS
EOF

# Maximum number of lines to put in a single here document.
maxshlines=9

# Break up $SEDDEFS (now in conftest.sh) because some shells have a limit
# on the size of here documents.

while :
do
  lines=`grep -c . conftest.sh`
  if test -z "$lines" || test "$lines" -eq 0; then break; fi
  rm -f conftest.s1 conftest.s2
  sed ${maxshlines}q conftest.sh > conftest.s1 # Like head -20.
  sed 1,${maxshlines}d conftest.sh > conftest.s2 # Like tail +21.
  # Write a limited-size here document to append to conftest.sed.
  echo 'cat >> conftest.sed <<CONFEOF' >> config.status
  cat conftest.s1 >> config.status
  echo 'CONFEOF' >> config.status
  rm -f conftest.s1 conftest.sh
  mv conftest.s2 conftest.sh
done
rm -f conftest.sh

# Now back to your regularly scheduled config.status.
cat >> config.status <<\EOF
# This sed command replaces #undef's with comments.  This is necessary, for
# example, in the case of _POSIX_SOURCE, which is predefined and required
# on some systems where configure will not decide to define it in
# config.h.
cat >> conftest.sed <<\CONFEOF
s,^[     ]*#[     ]*undef[     ][     ]*[a-zA-Z_][a-zA-Z_0-9]*,/* & */,
CONFEOF
rm -f conftest.h
# Break up the sed commands because old seds have small limits.
maxsedlines=20
cp $top_srcdir/$file.in conftest.h1
while :
do
  lines=`grep -c . conftest.sed`
  if test -z "$lines" || test "$lines" -eq 0; then break; fi
  rm -f conftest.s1 conftest.s2 conftest.h2
  sed ${maxsedlines}q conftest.sed > conftest.s1 # Like head -20.
  sed 1,${maxsedlines}d conftest.sed > conftest.s2 # Like tail +21.
  sed -f conftest.s1 < conftest.h1 > conftest.h2
  rm -f conftest.s1 conftest.h1 conftest.sed
  mv conftest.h2 conftest.h1
  mv conftest.s2 conftest.sed
done
rm -f conftest.sed conftest.h
echo "/* $file.  Generated automatically by configure.  */" > conftest.h
cat conftest.h1 >> conftest.h
rm -f conftest.h1
if cmp -s $file conftest.h 2>/dev/null; then
  # The file exists and we would not be changing it.
  rm -f conftest.h
else
  rm -f $file
  mv conftest.h $file
fi
fi; done


exit 0
EOF
chmod +x config.status
test -n "$no_create" || ./config.status