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-rw-r--r--include/ruby/defines.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/ruby/defines.h b/include/ruby/defines.h
index dc1df7545a..993caf0479 100644
--- a/include/ruby/defines.h
+++ b/include/ruby/defines.h
@@ -46,12 +46,14 @@ extern "C" {
# define NOINLINE(x) x
#endif
+#ifndef GCC_VERSION_SINCE
#define GCC_VERSION_SINCE(major, minor, patchlevel) \
(defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__) && \
((__GNUC__ > (major)) || \
((__GNUC__ == (major) && \
(__GNUC_MINOR__ > (minor)) || \
(__GNUC_MINOR__ == (minor) && __GNUC_PATCHLEVEL__ >= (patchlevel))))))
+#endif
/* likely */
#if __GNUC__ >= 3