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-rw-r--r--lib/libm_dbl/libm.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/libm_dbl/libm.h b/lib/libm_dbl/libm.h
index cbae69166..fa49ad1cd 100644
--- a/lib/libm_dbl/libm.h
+++ b/lib/libm_dbl/libm.h
@@ -89,7 +89,9 @@ do { \
(d) = __u.f; \
} while (0)
+#if !defined(DBL_EPSILON)
#define DBL_EPSILON 2.22044604925031308085e-16
+#endif
int __rem_pio2(double, double*);
int __rem_pio2_large(double*, double*, int, int, int);