diff options
Diffstat (limited to 'src/base/mutex.h')
| -rw-r--r-- | src/base/mutex.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/base/mutex.h b/src/base/mutex.h index 37527d5..ced2b99 100644 --- a/src/base/mutex.h +++ b/src/base/mutex.h @@ -134,7 +134,9 @@ // *does* cause problems for FreeBSD, or MacOSX, but isn't needed // for locking there.) # ifdef __linux__ -# define _XOPEN_SOURCE 500 // may be needed to get the rwlock calls +# ifndef _XOPEN_SOURCE // Some other header might have already set it for us. +# define _XOPEN_SOURCE 500 // may be needed to get the rwlock calls +# endif # endif # include <pthread.h> typedef pthread_rwlock_t MutexType; |