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-rw-r--r--lib/msun/src/math.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/msun/src/math.h b/lib/msun/src/math.h
index abeca6e8f21b..b902df15c878 100644
--- a/lib/msun/src/math.h
+++ b/lib/msun/src/math.h
@@ -50,6 +50,7 @@ extern const union __nan_un {
((sizeof (x) == sizeof (float)) ? __fpclassifyf(x) \
: (sizeof (x) == sizeof (double)) ? __fpclassifyd(x) \
: __fpclassifyl(x))
+#define signbit(x) __signbit(x)
typedef __double_t double_t;
typedef __float_t float_t;
@@ -147,6 +148,7 @@ __BEGIN_DECLS
int __fpclassifyd(double);
int __fpclassifyf(float);
int __fpclassifyl(long double);
+int __signbit(double);
double acos(double);
double asin(double);