| 1 | dnl mips-abi.m4--Check for MIPS/IRIX ABI flags. Sets $abi and $abilibdirext |
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| 2 | dnl to some value |
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| 3 | dnl Derrick Brashear |
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| 4 | dnl from KTH krb (from CMU) |
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| 5 | dnl $Id: mips-abi.m4,v 1.1.1.1 2002-10-13 18:01:01 ghudson Exp $ |
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| 6 | |
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| 7 | AC_DEFUN(AC_MIPS_ABI, [ |
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| 8 | AC_ARG_WITH(mips_abi, |
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| 9 | [ --with-mips-abi=abi ABI to use for IRIX (32, n32, or 64)]) |
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| 10 | |
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| 11 | case "$host_os" in |
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| 12 | irix*) |
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| 13 | with_mips_abi="${with_mips_abi:-yes}" |
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| 14 | if test -n "$GCC"; then |
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| 15 | |
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| 16 | # GCC < 2.8 only supports the O32 ABI. GCC >= 2.8 has a flag to select |
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| 17 | # which ABI to use, but only supports (as of 2.8.1) the N32 and 64 ABIs. |
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| 18 | # |
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| 19 | # Default to N32, but if GCC doesn't grok -mabi=n32, we assume an old |
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| 20 | # GCC and revert back to O32. The same goes if O32 is asked for - old |
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| 21 | # GCCs doesn't like the -mabi option, and new GCCs can't output O32. |
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| 22 | # |
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| 23 | # Don't you just love *all* the different SGI ABIs? |
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| 24 | |
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| 25 | case "${with_mips_abi}" in |
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| 26 | 32|o32) abi='-mabi=32'; abilibdirext='' ;; |
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| 27 | n32|yes) abi='-mabi=n32'; abilibdirext='32' ;; |
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| 28 | 64) abi='-mabi=64'; abilibdirext='64' ;; |
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| 29 | no) abi=''; abilibdirext='';; |
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| 30 | *) AC_ERROR("Invalid ABI specified") ;; |
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| 31 | esac |
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| 32 | if test -n "$abi" ; then |
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| 33 | ac_foo=krb_cv_gcc_`echo $abi | tr =- __` |
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| 34 | dnl |
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| 35 | dnl can't use AC_CACHE_CHECK here, since it doesn't quote CACHE-ID to |
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| 36 | dnl AC_MSG_RESULT |
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| 37 | dnl |
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| 38 | AC_MSG_CHECKING([if $CC supports the $abi option]) |
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| 39 | AC_CACHE_VAL($ac_foo, [ |
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| 40 | save_CFLAGS="$CFLAGS" |
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| 41 | CFLAGS="$CFLAGS $abi" |
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| 42 | AC_TRY_COMPILE(,int x;, eval $ac_foo=yes, eval $ac_foo=no) |
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| 43 | CFLAGS="$save_CFLAGS" |
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| 44 | ]) |
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| 45 | ac_res=`eval echo \\\$$ac_foo` |
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| 46 | AC_MSG_RESULT($ac_res) |
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| 47 | if test $ac_res = no; then |
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| 48 | # Try to figure out why that failed... |
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| 49 | case $abi in |
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| 50 | -mabi=32) |
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| 51 | save_CFLAGS="$CFLAGS" |
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| 52 | CFLAGS="$CFLAGS -mabi=n32" |
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| 53 | AC_TRY_COMPILE(,int x;, ac_res=yes, ac_res=no) |
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| 54 | CLAGS="$save_CFLAGS" |
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| 55 | if test $ac_res = yes; then |
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| 56 | # New GCC |
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| 57 | AC_ERROR([$CC does not support the $with_mips_abi ABI]) |
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| 58 | fi |
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| 59 | # Old GCC |
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| 60 | abi='' |
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| 61 | abilibdirext='' |
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| 62 | ;; |
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| 63 | -mabi=n32|-mabi=64) |
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| 64 | if test $with_mips_abi = yes; then |
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| 65 | # Old GCC, default to O32 |
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| 66 | abi='' |
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| 67 | abilibdirext='' |
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| 68 | else |
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| 69 | # Some broken GCC |
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| 70 | AC_ERROR([$CC does not support the $with_mips_abi ABI]) |
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| 71 | fi |
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| 72 | ;; |
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| 73 | esac |
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| 74 | fi #if test $ac_res = no; then |
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| 75 | fi #if test -n "$abi" ; then |
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| 76 | else |
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| 77 | case "${with_mips_abi}" in |
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| 78 | 32|o32) abi='-32'; abilibdirext='' ;; |
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| 79 | n32|yes) abi='-n32'; abilibdirext='32' ;; |
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| 80 | 64) abi='-64'; abilibdirext='64' ;; |
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| 81 | no) abi=''; abilibdirext='';; |
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| 82 | *) AC_ERROR("Invalid ABI specified") ;; |
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| 83 | esac |
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| 84 | fi #if test -n "$GCC"; then |
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| 85 | ;; |
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| 86 | esac |
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| 87 | |
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| 88 | dnl And then we munge variables to make things work |
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| 89 | CFLAGS="${CFLAGS} $abi" |
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| 90 | libdir=`echo $libdir | sed 's,/*$,$abilibdirext,'` |
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| 91 | LDFLAGS=`echo $LDFLAGS | sed -e "s,/lib$,/lib$abilibdirext," -e "s,\\\(/lib[^a-zA-Z]\\\),\\\1$abilibdirext,g"` |
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| 92 | |
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| 93 | ]) |
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