* regex_internal.h: Blank `pure' for GNUC < 3.

[gnulib.git] / lib / regex_internal.c

diff --git a/lib/regex_internal.c b/lib/regex_internal.c
index ad618cf..349ec52 100644 (file)
--- a/lib/regex_internal.c
+++ b/lib/regex_internal.c
@@ -17,6 +17,19 @@
    with this program; if not, write to the Free Software Foundation,
    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
 
+#ifndef __GNUC_PREREQ
+# if defined __GNUC__ && defined __GNUC_MINOR__
+#  define __GNUC_PREREQ(maj, min) \
+       ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+# else
+#  define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif
+
+#if !__GNUC_PREREQ (3, 0)
+# define pure
+#endif
+
 static void re_string_construct_common (const char *str, Idx len,
                                        re_string_t *pstr,
                                        REG_TRANSLATE_TYPE trans, bool icase,