libjava/classpath/m4/acattribute.m4

   1 dnl modified AC_C_INLINE from autoconf/c.m4
   2
   3 AN_IDENTIFIER([attribute], [AC_C_ATTRIBUTE])
   4 AC_DEFUN([AC_C_ATTRIBUTE],
   5 [AC_CACHE_CHECK([for __attribute__], ac_cv_c_attribute,
   6 [
   7 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
   8 [void foo(void) __attribute__ ((__noreturn__));]
   9 )],
  10 [ac_cv_c_attribute=yes],
  11 [ac_cv_c_attribute=no]
  12 )
  13 ])
  14 AH_VERBATIM([attribute],
  15 [/* Define to `__attribute__' to nothing if it's not supported.  */
  16 #undef __attribute__])
  17 case $ac_cv_c_attribute in
  18   yes) ;;
  19   no)
  20     cat >>confdefs.h <<_ACEOF
  21 #define __attribute__(x)    /* nothing */
  22 _ACEOF
  23     ;;
  24 esac
  25 ])# AC_C_ATTRIBUTE