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-rw-r--r-- | libraries/eet/m4/ac_attribute.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libraries/eet/m4/ac_attribute.m4 b/libraries/eet/m4/ac_attribute.m4 new file mode 100644 index 0000000..23479a9 --- /dev/null +++ b/libraries/eet/m4/ac_attribute.m4 | |||
@@ -0,0 +1,47 @@ | |||
1 | dnl Copyright (C) 2004-2008 Kim Woelders | ||
2 | dnl Copyright (C) 2008 Vincent Torri <vtorri at univ-evry dot fr> | ||
3 | dnl That code is public domain and can be freely used or copied. | ||
4 | dnl Originally snatched from somewhere... | ||
5 | |||
6 | dnl Macro for checking if the compiler supports __attribute__ | ||
7 | |||
8 | dnl Usage: AC_C___ATTRIBUTE__ | ||
9 | dnl call AC_DEFINE for HAVE___ATTRIBUTE__ and __UNUSED__ | ||
10 | dnl if the compiler supports __attribute__, HAVE___ATTRIBUTE__ is | ||
11 | dnl defined to 1 and __UNUSED__ is defined to __attribute__((unused)) | ||
12 | dnl otherwise, HAVE___ATTRIBUTE__ is not defined and __UNUSED__ is | ||
13 | dnl defined to nothing. | ||
14 | |||
15 | AC_DEFUN([AC_C___ATTRIBUTE__], | ||
16 | [ | ||
17 | |||
18 | AC_MSG_CHECKING([for __attribute__]) | ||
19 | |||
20 | AC_CACHE_VAL([ac_cv___attribute__], | ||
21 | [AC_TRY_COMPILE( | ||
22 | [ | ||
23 | #include <stdlib.h> | ||
24 | |||
25 | int func(int x); | ||
26 | int foo(int x __attribute__ ((unused))) | ||
27 | { | ||
28 | exit(1); | ||
29 | } | ||
30 | ], | ||
31 | [], | ||
32 | [ac_cv___attribute__="yes"], | ||
33 | [ac_cv___attribute__="no"] | ||
34 | )]) | ||
35 | |||
36 | AC_MSG_RESULT($ac_cv___attribute__) | ||
37 | |||
38 | if test "x${ac_cv___attribute__}" = "xyes" ; then | ||
39 | AC_DEFINE([HAVE___ATTRIBUTE__], [1], [Define to 1 if your compiler has __attribute__]) | ||
40 | AC_DEFINE([__UNUSED__], [__attribute__((unused))], [Macro declaring a function argument to be unused]) | ||
41 | else | ||
42 | AC_DEFINE([__UNUSED__], [], [Macro declaring a function argument to be unused]) | ||
43 | fi | ||
44 | |||
45 | ]) | ||
46 | |||
47 | dnl End of ac_attribute.m4 | ||