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-rw-r--r--math/tgmath.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/math/tgmath.h b/math/tgmath.h
index e8042833dd..13c7022275 100644
--- a/math/tgmath.h
+++ b/math/tgmath.h
@@ -785,6 +785,11 @@
/* Compute base-2 logarithm of X. */
#define log2(Val) __TGMATH_UNARY_REAL_ONLY (Val, log2)
+#if __GLIBC_USE (IEC_60559_FUNCS_EXT_C2X)
+/* Compute exponent to base ten. */
+#define exp10(Val) __TGMATH_UNARY_REAL_ONLY (Val, exp10)
+#endif
+
/* Power functions. */