# | |
# Check for supported __attribute__ features | |
# | |
# AC_C_ATTRIBUTE(FEATURE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) | |
# | |
AC_DEFUN([AC_C_ATTRIBUTE], | |
[AS_VAR_PUSHDEF([CACHEVAR], [ax_cv_c_attribute_$1])dnl | |
AC_CACHE_CHECK([for __attribute__ (($1))], | |
CACHEVAR,[ | |
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], | |
[[ void foo(void) __attribute__ (($1)); ]])], | |
[AS_VAR_SET(CACHEVAR, [yes])], | |
[AS_VAR_SET(CACHEVAR, [no])])]) | |
AS_VAR_IF(CACHEVAR,yes, | |
[m4_default([$2], :)], | |
[m4_default([$3], :)]) | |
AS_VAR_POPDEF([CACHEVAR])dnl | |
])dnl |