ac_have_attribute.m4 500 B

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  1. AC_DEFUN([AX_C___ATTRIBUTE__], [
  2. AC_MSG_CHECKING(for __attribute__)
  3. AC_CACHE_VAL(ac_cv___attribute__, [
  4. AC_TRY_COMPILE(
  5. [#include <stdlib.h>
  6. static void foo(void) __attribute__ ((unused));
  7. void foo(void) { exit(1); }],
  8. [],
  9. ac_cv___attribute__=yes,
  10. ac_cv___attribute__=no
  11. )])
  12. if test "$ac_cv___attribute__" = "yes"; then
  13. AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__])
  14. fi
  15. AC_MSG_RESULT($ac_cv___attribute__)
  16. ])