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-rw-r--r--newlib/libc/include/math.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/newlib/libc/include/math.h b/newlib/libc/include/math.h
index 7571e46a0..6e9da28f6 100644
--- a/newlib/libc/include/math.h
+++ b/newlib/libc/include/math.h
@@ -275,7 +275,9 @@ extern double lgamma _PARAMS((double));
extern double erf _PARAMS((double));
extern double erfc _PARAMS((double));
extern double log2 _PARAMS((double));
+#if !defined(__cplusplus)
#define log2(x) (log (x) / _M_LOG2_E)
+#endif
#ifndef __math_68881
extern double hypot _PARAMS((double, double));
@@ -353,7 +355,9 @@ extern float lgammaf _PARAMS((float));
extern float erff _PARAMS((float));
extern float erfcf _PARAMS((float));
extern float log2f _PARAMS((float));
+#if !defined(__cplusplus)
#define log2f(x) (logf (x) / (float) _M_LOG2_E)
+#endif
extern float hypotf _PARAMS((float, float));
#endif /* ! defined (_REENT_ONLY) */