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Fix redefinition of _XOPEN_SOURCE.

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Under Debian Jessie, I get a warning about redefining _XOPEN_SOURCE
which is easy to fix.
This commit is contained in:
Brian Silverman 2015-06-16 16:50:25 -07:00
parent 287ab79862
commit beb55fa825
1 changed files with 3 additions and 1 deletions
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4
src/base/mutex.h
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@ -134,7 +134,9 @@
// *does* cause problems for FreeBSD, or MacOSX, but isn't needed // *does* cause problems for FreeBSD, or MacOSX, but isn't needed
// for locking there.) // for locking there.)
# ifdef __linux__ # 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 # endif
# include <pthread.h> # include <pthread.h>
typedef pthread_rwlock_t MutexType; typedef pthread_rwlock_t MutexType;