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-rw-r--r--math/math.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/math/math.h b/math/math.h
index e08d210be8..22274f023e 100644
--- a/math/math.h
+++ b/math/math.h
@@ -96,6 +96,15 @@ __BEGIN_DECLS
#endif /* __STDC__ || __GNUC__ */
#endif /* Use misc or ISO C 9X. */
+#undef __MATHDECL_1
+#undef __MATHDECL
+#undef __MATHCALL
+
+
+#if defined __USE_MISC || defined __USE_XOPEN || defined __USE_ISOC9X
+/* This variable is used by `gamma' and `lgamma'. */
+extern int signgam;
+#endif
/* ISO C 9X defines some generic macros which work on any data type. */