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-rw-r--r--bits/mathdef.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/bits/mathdef.h b/bits/mathdef.h
index b034c5c..0d1c4d7 100644
--- a/bits/mathdef.h
+++ b/bits/mathdef.h
@@ -16,11 +16,11 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-#ifndef _MATH_H
+if !defined _MATH_H && !defined _COMPLEX_H
# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
#endif
-#ifdef __USE_ISOC9X
+#if defined __USE_ISOC9X && defined _MATH_H
/* Normally, there is no long double type and the `float' and `double'
expressions are evaluated as `double'. */
typedef double float_t; /* `float' expressions are evaluated as
@@ -44,6 +44,8 @@ typedef double double_t; /* `double' expressions are evaluated as
#endif /* ISO C 9X */
+#ifndef __NO_LONG_DOUBLE_MATH
/* Signal that we do not really have a `long double'. The disables the
declaration of all the `long double' function variants. */
-#define __NO_LONG_DOUBLE_MATH 1
+# define __NO_LONG_DOUBLE_MATH 1
+#endif