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##
## $Header: /home/cvs/d4x/m4/gcc_check_obsolete_option.m4,v 1.1.1.1 2004/07/01 15:37:55 max Exp $
##
## Sun 10 Nov 2002 12:45:02 AM MSK by Zaufi
##
## Checking for obsolete options of gcc
##
## $1 = option to check
## $2 = action if given option is obsolete
## $3 = action if given option is OK
##
## How this working: If option is obsolete gcc will issue the warning.
## Giving -Werror to compiler we force fail status code of compilation
## if any warning exist. Here the pretty simple test program, so nothing
## can happens 'cept obsolete option...
##
AC_DEFUN([GCC_CHECK_OBSOLETE_OPTION],[
AC_REQUIRE([AC_PROG_CC])
AC_CACHE_CHECK([whether $1 is obsolete option], [ac_cv_`echo $1 | tr =- __`_obsolete],
[
AC_LANG_SAVE
AC_LANG_C
old_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS -Werror $1"
AC_TRY_COMPILE(,,
[eval "ac_cv_`echo $1 | tr =- __`_obsolete=no"],
[eval "ac_cv_`echo $1 | tr =- __`_obsolete=yes"])
CFLAGS=$old_CFLAGS
AC_LANG_RESTORE
])
if eval "test \"\${ac_cv_`echo $1 | tr =- __`_obsolete}\" = \"yes\""; then
[$2]
else
[$3]
fi
])
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