diff options
Diffstat (limited to 'include/features.h')
| -rw-r--r-- | include/features.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/features.h b/include/features.h index ab3126cdbf..96ac7e5f75 100644 --- a/include/features.h +++ b/include/features.h @@ -152,7 +152,8 @@ which was used prior to the standard acceptance. This macro will eventually go away and the features enabled by default once the ISO C99 standard is widely adopted. */ -#if defined _ISOC99_SOURCE || defined _ISOC9X_SOURCE +#if (defined _ISOC99_SOURCE || defined _ISOC9X_SOURCE \ + || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)) # define __USE_ISOC99 1 #endif |