configure

早期freebsd实现

rm -f conftest*


fi
rm -f conftest*

for hdr in string.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
  rm -rf conftest*
  
{
test -n "$verbose" && \
echo "	defining ${trhdr}"
echo "#define" ${trhdr} 1 >> confdefs.h
DEFS="$DEFS -D${trhdr}=1"
}


fi
rm -f conftest*
done


case "$YACC" in
*bison*)
  # 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
  rm -rf conftest*
  
{
test -n "$verbose" && \
echo "	defining HAVE_ALLOCA_H"
echo "#define" HAVE_ALLOCA_H 1 >> confdefs.h
DEFS="$DEFS -DHAVE_ALLOCA_H=1"
}


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
  rm -rf conftest*
  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
  rm -rf conftest*
  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 $compile; then
  rm -rf conftest*
  {
test -n "$verbose" && \
echo "	defining" CRAY_STACKSEG_END to be _getb67
echo "#define" CRAY_STACKSEG_END _getb67 >> confdefs.h
DEFS="$DEFS -DCRAY_STACKSEG_END=_getb67"
}


else
  rm -rf conftest*
  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 $compile; then
  rm -rf conftest*
  {
test -n "$verbose" && \
echo "	defining" CRAY_STACKSEG_END to be GETB67
echo "#define" CRAY_STACKSEG_END GETB67 >> confdefs.h
DEFS="$DEFS -DCRAY_STACKSEG_END=GETB67"
}


else
  rm -rf conftest*
  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 $compile; then
  rm -rf conftest*
  {
test -n "$verbose" && \
echo "	defining" CRAY_STACKSEG_END to be getb67
echo "#define" CRAY_STACKSEG_END getb67 >> confdefs.h
DEFS="$DEFS -DCRAY_STACKSEG_END=getb67"
}


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"
}


  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 -fr 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"
}

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"
}


else
  
{
test -n "$verbose" && \
echo "	defining" STACK_DIRECTION to be -1
echo "#define" STACK_DIRECTION -1 >> confdefs.h
DEFS="$DEFS -DSTACK_DIRECTION=-1"
}

fi
fi
rm -fr conftest*
fi

  ;;
esac

# Set default prefixes.
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
# Substitute for predefined variables.

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 \${CONFIG_SHELL-/bin/sh} $0 $configure_args
    exec \${CONFIG_SHELL-/bin/sh} $0 $configure_args ;;
    *) echo "Usage: config.status --recheck" 2>&1; exit 1 ;;
  esac
done

trap 'rm -f Makefile; exit 1' 1 3 15
LN_S='$LN_S'
YACC='$YACC'
CC='$CC'
RANLIB='$RANLIB'
INSTALL='$INSTALL'
INSTALL_PROGRAM='$INSTALL_PROGRAM'
INSTALL_DATA='$INSTALL_DATA'
CPP='$CPP'
ALLOCA='$ALLOCA'
LIBS='$LIBS'
srcdir='$srcdir'
DEFS='$DEFS'
prefix='$prefix'
exec_prefix='$exec_prefix'
prsub='$prsub'
extrasub='$extrasub'
EOF
cat >> config.status <<\EOF

top_srcdir=$srcdir

CONFIG_FILES=${CONFIG_FILES-"Makefile"}
for file in .. ${CONFIG_FILES}; do if test "x$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"
  comment_str="Generated automatically from `echo $file|sed 's|.*/||'`.in by configure."
  case "$file" in
    *.c | *.h | *.C | *.cc | *.m )  echo "/* $comment_str */" > "$file" ;;
    * )          echo "# $comment_str"     > "$file" ;;
  esac
  sed -e "
$prsub
$extrasub
s%@LN_S@%$LN_S%g
s%@YACC@%$YACC%g
s%@CC@%$CC%g
s%@RANLIB@%$RANLIB%g
s%@INSTALL@%$INSTALL%g
s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
s%@INSTALL_DATA@%$INSTALL_DATA%g
s%@CPP@%$CPP%g
s%@ALLOCA@%$ALLOCA%g
s%@LIBS@%$LIBS%g
s%@srcdir@%$srcdir%g
s%@DEFS@%$DEFS%
" $top_srcdir/${file}.in >> $file
fi; done


exit 0
EOF
chmod +x config.status
${CONFIG_SHELL-/bin/sh} config.status