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author | Jérémy Zurcher <jeremy@asynk.ch> | 2012-09-08 00:26:51 +0200 |
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committer | Jérémy Zurcher <jeremy@asynk.ch> | 2012-09-08 00:26:51 +0200 |
commit | ea927b1bb808b11df21d5adda4b8232fd2a6d859 (patch) | |
tree | 2dadf38efe470b36079e0a8792d35919741919c7 /autofoo-efl/m4/ac_attribute.m4 | |
parent | ef4a9a658ef88934c1e9152d1d056cb95d0c2046 (diff) | |
download | skeletons-ea927b1bb808b11df21d5adda4b8232fd2a6d859.zip skeletons-ea927b1bb808b11df21d5adda4b8232fd2a6d859.tar.gz |
Diffstat (limited to 'autofoo-efl/m4/ac_attribute.m4')
-rw-r--r-- | autofoo-efl/m4/ac_attribute.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/autofoo-efl/m4/ac_attribute.m4 b/autofoo-efl/m4/ac_attribute.m4 new file mode 100644 index 0000000..23479a9 --- /dev/null +++ b/autofoo-efl/m4/ac_attribute.m4 @@ -0,0 +1,47 @@ +dnl Copyright (C) 2004-2008 Kim Woelders +dnl Copyright (C) 2008 Vincent Torri <vtorri at univ-evry dot fr> +dnl That code is public domain and can be freely used or copied. +dnl Originally snatched from somewhere... + +dnl Macro for checking if the compiler supports __attribute__ + +dnl Usage: AC_C___ATTRIBUTE__ +dnl call AC_DEFINE for HAVE___ATTRIBUTE__ and __UNUSED__ +dnl if the compiler supports __attribute__, HAVE___ATTRIBUTE__ is +dnl defined to 1 and __UNUSED__ is defined to __attribute__((unused)) +dnl otherwise, HAVE___ATTRIBUTE__ is not defined and __UNUSED__ is +dnl defined to nothing. + +AC_DEFUN([AC_C___ATTRIBUTE__], +[ + +AC_MSG_CHECKING([for __attribute__]) + +AC_CACHE_VAL([ac_cv___attribute__], + [AC_TRY_COMPILE( + [ +#include <stdlib.h> + +int func(int x); +int foo(int x __attribute__ ((unused))) +{ + exit(1); +} + ], + [], + [ac_cv___attribute__="yes"], + [ac_cv___attribute__="no"] + )]) + +AC_MSG_RESULT($ac_cv___attribute__) + +if test "x${ac_cv___attribute__}" = "xyes" ; then + AC_DEFINE([HAVE___ATTRIBUTE__], [1], [Define to 1 if your compiler has __attribute__]) + AC_DEFINE([__UNUSED__], [__attribute__((unused))], [Macro declaring a function argument to be unused]) + else + AC_DEFINE([__UNUSED__], [], [Macro declaring a function argument to be unused]) +fi + +]) + +dnl End of ac_attribute.m4 |