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-rw-r--r--lib/stdlib.in.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/stdlib.in.h b/lib/stdlib.in.h
index 59f9e6c71d1..5c598a275d1 100644
--- a/lib/stdlib.in.h
+++ b/lib/stdlib.in.h
@@ -102,7 +102,7 @@ struct random_data
/* The __attribute__ feature is available in gcc versions 2.5 and later.
The attribute __pure__ was added in gcc 2.96. */
#ifndef _GL_ATTRIBUTE_PURE
-# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
# else
# define _GL_ATTRIBUTE_PURE /* empty */