glibc/sysdeps/mach/hurd/configure

 
# GNU libc on the Hurd is always reentrant.
DEFINES="$DEFINES -D_LIBC_REENTRANT"

# Don't bother trying to generate any glue code to be compatible with the
# existing system library, because we are the only system library.
inhibit_glue=yes

if test "x$prefix" != x; then
  echo "configure: warning: --prefix= (empty) is required for GNU/Hurd to work normally" 1>&2
fi

case "$machine" in
  i386*)
    # With --enable-libio, the default oldest ABI is 2.5.5;
    # without --enable-libio, the default oldest ABI is 2.0.
    # We only need a "yes" here if the oldest ABI supported will be < 2.2.5.
    if if test "$stdio" = libio; then
         test "$oldest_abi" != default && test "$oldest_abi" \< "2.2.5"
       else
         test "$oldest_abi" = default || test "$oldest_abi" \< "2.2.5"
       fi; then
      libc_cv_gcc_unwind_find_fde=yes
    fi
    ;;
esac



# See if mig groks `retcode'.
echo $ac_n "checking whether $MIG supports the retcode keyword""... $ac_c" 1>&6
echo "configure:33: checking whether $MIG supports the retcode keyword" >&5
if eval "test \"`echo '$''{'hurd_cv_mig_retcode'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.defs <<\EOF
#include <mach/std_types.defs>
#include <mach/mach_types.defs>
subsystem foobar 1000;
type reply_port_t = polymorphic | MACH_MSG_TYPE_PORT_SEND_ONCE
	ctype: mach_port_t;
simpleroutine foobar_reply (
	reply_port: reply_port_t;
	err: kern_return_t, RetCode);
EOF
if { ac_try='CC="${CC}" ${MIG-false} -n conftest.defs 1>&5'; { (eval echo configure:47: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
  hurd_cv_mig_retcode=yes
else
  hurd_cv_mig_retcode=no
fi
rm -f conftest*
fi

echo "$ac_t""$hurd_cv_mig_retcode" 1>&6
if test $hurd_cv_mig_retcode = yes; then
  cat >> confdefs.h <<\EOF
#define HAVE_MIG_RETCODE 1
EOF

fi