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-rw-r--r--include/c99_math.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/c99_math.h b/include/c99_math.h
index ee0dd105e49..7ed7cc22176 100644
--- a/include/c99_math.h
+++ b/include/c99_math.h
@@ -83,7 +83,11 @@ roundf(float x)
#if (defined(_MSC_VER) && _MSC_VER < 1800) || \
- (!defined(_MSC_VER) && __STDC_VERSION__ < 199901L && !defined(__cplusplus))
+ (!defined(_MSC_VER) && \
+ __STDC_VERSION__ < 199901L && \
+ (!defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 600) && \
+ !defined(__cplusplus))
+
static inline long int
lrint(double d)
{
@@ -135,6 +139,7 @@ llrintf(float f)
return rounded;
}
+
#endif /* C99 */