+dnl Define HAVE_COMPOUND_LITERALS if the C compiler supports compound literals
+dnl as in ISO C99.
+dnl Note that compound literals such as (struct s) { 3, 4 } can be used for
+dnl initialization of stack-allocated variables, but are not constant
+dnl expressions and therefore cannot be used as initializer for global or
+dnl static variables (even though gcc supports this in pre-C99 mode).
+AC_DEFUN([gl_C_COMPOUND_LITERALS],
+[
+ AC_CACHE_CHECK([for compound literals], gl_cv_compound_literals,
+ [AC_TRY_COMPILE([struct s { int i, j; };],
+ [struct s t = (struct s) { 3, 4 };
+ if (t.i != 0) return 0;],
+ gl_cv_compound_literals=yes,
+ gl_cv_compound_literals=no)])
+ if test $gl_cv_compound_literals = yes; then
+ AC_DEFINE(HAVE_COMPOUND_LITERALS, 1,
+ [Define if you have compound literals.])
+ fi
+])
+