+if test "$cf_cv_have___va_copy" = yes
+then
+ AC_DEFINE(HAVE___VA_COPY,1,[Define to 1 if we have __va_copy])
+else # !cf_cv_have___va_copy
+
+AC_CACHE_CHECK(for __builtin_va_copy, cf_cv_have___builtin_va_copy,[
+AC_TRY_LINK([
+#include <stdarg.h>
+],[
+ static va_list dst;
+ static va_list src;
+ __builtin_va_copy(dst, src)],
+ cf_cv_have___builtin_va_copy=yes,
+ cf_cv_have___builtin_va_copy=no)])
+
+test "$cf_cv_have___builtin_va_copy" = yes &&
+ AC_DEFINE(HAVE___BUILTIN_VA_COPY,1,[Define to 1 if we have __builtin_va_copy])
+
+fi # cf_cv_have___va_copy
+
+fi # cf_cv_have_va_copy
+
+case "${cf_cv_have_va_copy}${cf_cv_have___va_copy}${cf_cv_have___builtin_va_copy}" in
+(*yes*)
+ ;;
+
+(*)
+ AC_CACHE_CHECK(if we can simply copy va_list, cf_cv_pointer_va_list,[
+AC_TRY_LINK([
+#include <stdarg.h>
+],[
+ va_list dst;
+ va_list src;
+ dst = src],
+ cf_cv_pointer_va_list=yes,
+ cf_cv_pointer_va_list=no)])
+
+ if test "$cf_cv_pointer_va_list" = no
+ then
+ AC_CACHE_CHECK(if we can copy va_list indirectly, cf_cv_array_va_list,[
+AC_TRY_LINK([
+#include <stdarg.h>
+],[
+ va_list dst;
+ va_list src;
+ *dst = *src],
+ cf_cv_array_va_list=yes,
+ cf_cv_array_va_list=no)])
+ test "$cf_cv_array_va_list" = yes && AC_DEFINE(ARRAY_VA_LIST,1,[Define to 1 if we can copy va_list indirectly])
+ fi
+ ;;
+esac