use _GL_ATTRIBUTE_CONST and _GL_ATTRIBUTE_PURE

[pspp] / lib / file-type.c

diff --git a/lib/file-type.c b/lib/file-type.c
index 109db44024538c69790b394098cbc12ca1416d4b..f7090cdd1dc5ae20de6fe449f7af5bff5c44f8f8 100644 (file)
--- a/lib/file-type.c
+++ b/lib/file-type.c
@@ -25,7 +25,15 @@
 #include <gettext.h>
 #define _(text) gettext (text)
 
-char const *
+/* The attribute __pure__ was added in gcc 2.96.  */
+#undef _GL_ATTRIBUTE_PURE
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define _GL_ATTRIBUTE_PURE /* empty */
+#endif
+
+char const * _GL_ATTRIBUTE_PURE
 file_type (struct stat const *st)
 {
   /* See POSIX 1003.1-2001 XCU Table 4-8 lines 17093-17107 for some of