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-rw-r--r--include/math.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/math.h b/include/math.h
index ca9a1f0cd6..79ebbae359 100644
--- a/include/math.h
+++ b/include/math.h
@@ -100,12 +100,14 @@ fabsf128 (_Float128 x)
 #    define MATH_REDIRECT_F128(FUNC, PREFIX, ARGS)
 #   endif
 #   define MATH_REDIRECT_UNARY_ARGS(TYPE) TYPE
+#   define MATH_REDIRECT_BINARY_ARGS(TYPE) TYPE, TYPE
 MATH_REDIRECT (sqrt, "__ieee754_", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (ceil, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (floor, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (rint, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (trunc, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (round, "__", MATH_REDIRECT_UNARY_ARGS)
+MATH_REDIRECT (copysign, "__", MATH_REDIRECT_BINARY_ARGS)
 #  endif
 # endif