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-rw-r--r--newlib/libc/include/math.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/newlib/libc/include/math.h b/newlib/libc/include/math.h
index ce7263194..a5b5936ec 100644
--- a/newlib/libc/include/math.h
+++ b/newlib/libc/include/math.h
@@ -250,6 +250,7 @@ extern double gamma _PARAMS((double));
extern double lgamma _PARAMS((double));
extern double erf _PARAMS((double));
extern double erfc _PARAMS((double));
+extern double log2 _PARAMS((double));
#define log2(x) (log (x) / _M_LOG2_E)
#ifndef __math_68881
@@ -328,6 +329,7 @@ extern float gammaf _PARAMS((float));
extern float lgammaf _PARAMS((float));
extern float erff _PARAMS((float));
extern float erfcf _PARAMS((float));
+extern float log2f _PARAMS((float));
#define log2f(x) (logf (x) / (float) _M_LOG2_E)
extern float hypotf _PARAMS((float, float));
#endif /* ! defined (_REENT_ONLY) */