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-rw-r--r--math/bits/mathcalls.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index a881b7d69c..7ffe0407e9 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -229,10 +229,12 @@ __END_NAMESPACE_C99
/* Return nonzero if VALUE is not a number. */
__MATHDECL_1 (int,__isnan,, (_Mdouble_ __value)) __attribute__ ((__const__));
-#if defined __USE_MISC || defined __USE_XOPEN
+#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
/* Return nonzero if VALUE is not a number. */
__MATHDECL_1 (int,isnan,, (_Mdouble_ __value)) __attribute__ ((__const__));
+#endif
+#if defined __USE_MISC || defined __USE_XOPEN
/* Bessel functions. */
__MATHCALL (j0,, (_Mdouble_));
__MATHCALL (j1,, (_Mdouble_));
@@ -259,7 +261,7 @@ __MATHCALL (tgamma,, (_Mdouble_));
__END_NAMESPACE_C99
#endif
-#if defined __USE_MISC || defined __USE_XOPEN
+#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
/* Obsolete alias for `lgamma'. */
__MATHCALL (gamma,, (_Mdouble_));
#endif
@@ -366,7 +368,9 @@ __MATHDECL_1 (int, __issignaling,, (_Mdouble_ __value))
__attribute__ ((__const__));
#endif
-#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
+#if defined __USE_MISC || (defined __USE_XOPEN_EXTENDED \
+ && __MATH_DECLARING_DOUBLE \
+ && !defined __USE_XOPEN2K8)
/* Return X times (2 to the Nth power). */
__MATHCALL (scalb,, (_Mdouble_ __x, _Mdouble_ __n));
#endif