diff options
Diffstat (limited to 'bits/mathdef.h')
| -rw-r--r-- | bits/mathdef.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/bits/mathdef.h b/bits/mathdef.h index d306e54366..0c30b01f52 100644 --- a/bits/mathdef.h +++ b/bits/mathdef.h @@ -20,7 +20,9 @@ # error "Never use <bits/mathdef.h> directly; include <math.h> instead" #endif -#if defined __USE_ISOC99 && defined _MATH_H +#if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF +# define _MATH_H_MATHDEF 1 + /* 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 |