Do not blindly use __builtin_clz() #ifdef __GNUC__, but only if gcc >= 3.4 for

it did not exist in previous releases. ok matthieu@
2013-07-17 19:27:22 +00:00 · 2013-07-17 19:27:22 +00:00 · 2673d4da6b
commit 2673d4da6b
parent 2fb4e077c6
1 changed files with 2 additions and 1 deletions
--- a/lib/pixman/pixman/pixman-matrix.c
+++ b/lib/pixman/pixman/pixman-matrix.c
@ -37,7 +37,8 @@
 static force_inline int
 count_leading_zeros (uint32_t x)
 {
-#ifdef __GNUC__
+#if defined(__GNUC__) && \
+	(__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
    return __builtin_clz (x);
 #else
    int n = 0;