* making math.h c89 compatible
@ 2012-07-22 22:25 Szabolcs Nagy
0 siblings, 0 replies; only message in thread
From: Szabolcs Nagy @ 2012-07-22 22:25 UTC (permalink / raw)
To: musl
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__FLOAT_BITS macro uses compound literal
i think this is the only case where
standard c header is not c89 compatible
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diff --git a/include/math.h b/include/math.h
index d732648..ffde3da 100644
--- a/include/math.h
+++ b/include/math.h
@@ -44,8 +44,13 @@ int __fpclassifyl(long double);
union __float_repr { float __f; __uint32_t __i; };
union __double_repr { double __f; __uint64_t __i; };
+#if __STDC_VERSION__ >= 199901L
#define __FLOAT_BITS(f) (((union __float_repr){ (float)(f) }).__i)
#define __DOUBLE_BITS(f) (((union __double_repr){ (double)(f) }).__i)
+#else
+static __uint32_t __FLOAT_BITS(float __f) { union __float_repr __u = {__f}; return __u.__i; }
+static __uint64_t __DOUBLE_BITS(double __f) { union __double_repr __u = {__f}; return __u.__i; }
+#endif
#define fpclassify(x) ( \
sizeof(x) == sizeof(float) ? __fpclassifyf(x) : \
@@ -199,8 +204,8 @@ float fmodf(float, float);
long double fmodl(long double, long double);
double frexp(double, int *);
-float frexpf(float value, int *);
-long double frexpl(long double value, int *);
+float frexpf(float, int *);
+long double frexpl(long double, int *);
double hypot(double, double);
float hypotf(float, float);
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2012-07-22 22:25 making math.h c89 compatible Szabolcs Nagy
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