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dnl Copyright © 2005 William Pitcock, et al. |
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dnl Rights to this code are as documented in doc/pod/license.pod. |
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dnl |
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dnl This file contains autoconf macros used in configure. |
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dnl |
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dnl $Id: atheme-c.m4,v 1.1 2007-07-19 08:24:51 pippijn Exp $ |
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|
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dnl Stolen from hyperion. |
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|
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dnl ERMYTH_C_GCC_TRY_FLAGS(<warnings>,<cachevar>) |
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AC_DEFUN([ERMYTH_C_GCC_TRY_FLAGS],[ |
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AC_MSG_CHECKING([GCC flag(s) $1]) |
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if test "${GCC-no}" = yes |
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then |
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AC_CACHE_VAL($2,[ |
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oldcflags="${CFLAGS-}" |
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CFLAGS="${CFLAGS-} ${CWARNS} $1 -Werror" |
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AC_TRY_COMPILE([ |
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#include <string.h> |
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#include <stdio.h> |
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int main(void); |
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],[ |
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strcmp("a","b"); fprintf(stdout,"test ok\n"); |
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], [$2=yes], [$2=no]) |
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CFLAGS="${oldcflags}"]) |
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if test "x$$2" = xyes; then |
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CWARNS="${CWARNS}$1 " |
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AC_MSG_RESULT(ok) |
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else |
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$2='' |
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AC_MSG_RESULT(no) |
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fi |
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else |
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AC_MSG_RESULT(no, not using GCC) |
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fi |
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]) |
