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      1 dnl Id
      2 dnl
      3 dnl
      4 dnl Check for MIPS/IRIX ABI flags. Sets $abi and $abilibdirext to some
      5 dnl value.
      6 
      7 AC_DEFUN([AC_MIPS_ABI], [
      8 AC_ARG_WITH(mips_abi,
      9 	AS_HELP_STRING([--with-mips-abi=abi],[ABI to use for IRIX (32, n32, or 64)]))
     10 
     11 case "$host_os" in
     12 irix*)
     13 with_mips_abi="${with_mips_abi:-yes}"
     14 if test -n "$GCC"; then
     15 
     16 # GCC < 2.8 only supports the O32 ABI. GCC >= 2.8 has a flag to select
     17 # which ABI to use, but only supports (as of 2.8.1) the N32 and 64 ABIs.
     18 #
     19 # Default to N32, but if GCC doesn't grok -mabi=n32, we assume an old
     20 # GCC and revert back to O32. The same goes if O32 is asked for - old
     21 # GCCs doesn't like the -mabi option, and new GCCs can't output O32.
     22 #
     23 # Don't you just love *all* the different SGI ABIs?
     24 
     25 case "${with_mips_abi}" in 
     26         32|o32) abi='-mabi=32';  abilibdirext=''     ;;
     27        n32|yes) abi='-mabi=n32'; abilibdirext='32'  ;;
     28         64) abi='-mabi=64';  abilibdirext='64'   ;;
     29 	no) abi=''; abilibdirext='';;
     30          *) AC_MSG_ERROR("Invalid ABI specified") ;;
     31 esac
     32 if test -n "$abi" ; then
     33 ac_foo=krb_cv_gcc_`echo $abi | tr =- __`
     34 dnl
     35 dnl can't use AC_CACHE_CHECK here, since it doesn't quote CACHE-ID to
     36 dnl AC_MSG_RESULT
     37 dnl
     38 AC_MSG_CHECKING([if $CC supports the $abi option])
     39 AC_CACHE_VAL($ac_foo, [
     40 save_CFLAGS="$CFLAGS"
     41 CFLAGS="$CFLAGS $abi"
     42 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[int x;]])],[eval $ac_foo=yes], [eval $ac_foo=no])dnl
     43 CFLAGS="$save_CFLAGS"
     44 ])
     45 ac_res=`eval echo \\\$$ac_foo`
     46 AC_MSG_RESULT($ac_res)
     47 if test $ac_res = no; then
     48 # Try to figure out why that failed...
     49 case $abi in
     50 	-mabi=32) 
     51 	save_CFLAGS="$CFLAGS"
     52 	CFLAGS="$CFLAGS -mabi=n32"
     53 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[int x;]])],[ac_res=yes],[ac_res=no])dnl
     54 	CLAGS="$save_CFLAGS"
     55 	if test $ac_res = yes; then
     56 		# New GCC
     57 		AC_MSG_ERROR([$CC does not support the $with_mips_abi ABI])
     58 	fi
     59 	# Old GCC
     60 	abi=''
     61 	abilibdirext=''
     62 	;;
     63 	-mabi=n32|-mabi=64)
     64 		if test $with_mips_abi = yes; then
     65 			# Old GCC, default to O32
     66 			abi=''
     67 			abilibdirext=''
     68 		else
     69 			# Some broken GCC
     70 			AC_MSG_ERROR([$CC does not support the $with_mips_abi ABI])
     71 		fi
     72 	;;
     73 esac
     74 fi #if test $ac_res = no; then
     75 fi #if test -n "$abi" ; then
     76 else
     77 case "${with_mips_abi}" in
     78         32|o32) abi='-32'; abilibdirext=''     ;;
     79        n32|yes) abi='-n32'; abilibdirext='32'  ;;
     80         64) abi='-64'; abilibdirext='64'   ;;
     81 	no) abi=''; abilibdirext='';;
     82          *) AC_MSG_ERROR("Invalid ABI specified") ;;
     83 esac
     84 fi #if test -n "$GCC"; then
     85 ;;
     86 esac
     87 ])
     88