1dnl modified AC_C_INLINE from autoconf/c.m4 2 3AN_IDENTIFIER([attribute], [AC_C_ATTRIBUTE]) 4AC_DEFUN([AC_C_ATTRIBUTE], 5[AC_CACHE_CHECK([for __attribute__], ac_cv_c_attribute, 6[ 7AC_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]) 14AH_VERBATIM([attribute], 15[/* Define to `__attribute__' to nothing if it's not supported. */ 16#undef __attribute__]) 17case $ac_cv_c_attribute in 18 yes) ;; 19 no) 20 cat >>confdefs.h <<_ACEOF 21#define __attribute__(x) /* nothing */ 22_ACEOF 23 ;; 24esac 25])# AC_C_ATTRIBUTE 26