| # | |
| # 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 |