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dnl $Id$
dnl
dnl
dnl Check for MIPS/IRIX ABI flags. Sets $abi and $abilibdirext to some
dnl value.
AC_DEFUN([AC_MIPS_ABI], [
AC_ARG_WITH(mips_abi,
AS_HELP_STRING([--with-mips-abi=abi],[ABI to use for IRIX (32, n32, or 64)]))
case "$host_os" in
irix*)
with_mips_abi="${with_mips_abi:-yes}"
if test -n "$GCC"; then
# GCC < 2.8 only supports the O32 ABI. GCC >= 2.8 has a flag to select
# which ABI to use, but only supports (as of 2.8.1) the N32 and 64 ABIs.
#
# Default to N32, but if GCC doesn't grok -mabi=n32, we assume an old
# GCC and revert back to O32. The same goes if O32 is asked for - old
# GCCs doesn't like the -mabi option, and new GCCs can't output O32.
#
# Don't you just love *all* the different SGI ABIs?
case "${with_mips_abi}" in
32|o32) abi='-mabi=32'; abilibdirext='' ;;
n32|yes) abi='-mabi=n32'; abilibdirext='32' ;;
64) abi='-mabi=64'; abilibdirext='64' ;;
no) abi=''; abilibdirext='';;
*) AC_MSG_ERROR("Invalid ABI specified") ;;
esac
if test -n "$abi" ; then
ac_foo=krb_cv_gcc_`echo $abi | tr =- __`
dnl
dnl can't use AC_CACHE_CHECK here, since it doesn't quote CACHE-ID to
dnl AC_MSG_RESULT
dnl
AC_MSG_CHECKING([if $CC supports the $abi option])
AC_CACHE_VAL($ac_foo, [
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $abi"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[int x;]])],[eval $ac_foo=yes], [eval $ac_foo=no])dnl
CFLAGS="$save_CFLAGS"
])
ac_res=`eval echo \\\$$ac_foo`
AC_MSG_RESULT($ac_res)
if test $ac_res = no; then
# Try to figure out why that failed...
case $abi in
-mabi=32)
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -mabi=n32"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[int x;]])],[ac_res=yes],[ac_res=no])dnl
CLAGS="$save_CFLAGS"
if test $ac_res = yes; then
# New GCC
AC_MSG_ERROR([$CC does not support the $with_mips_abi ABI])
fi
# Old GCC
abi=''
abilibdirext=''
;;
-mabi=n32|-mabi=64)
if test $with_mips_abi = yes; then
# Old GCC, default to O32
abi=''
abilibdirext=''
else
# Some broken GCC
AC_MSG_ERROR([$CC does not support the $with_mips_abi ABI])
fi
;;
esac
fi #if test $ac_res = no; then
fi #if test -n "$abi" ; then
else
case "${with_mips_abi}" in
32|o32) abi='-32'; abilibdirext='' ;;
n32|yes) abi='-n32'; abilibdirext='32' ;;
64) abi='-64'; abilibdirext='64' ;;
no) abi=''; abilibdirext='';;
*) AC_MSG_ERROR("Invalid ABI specified") ;;
esac
fi #if test -n "$GCC"; then
;;
esac
])
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