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authorJakob Kaivo <jkk@ung.org>2020-08-12 19:13:56 -0400
committerJakob Kaivo <jkk@ung.org>2020-08-12 19:13:56 -0400
commitc486885ecda309759144ebad16ec4afd566e0bee (patch)
tree505e86e0afc8341ccbceff8713e2a00fd56c6311 /ndbm.h
parent5638ea3056acb6c3c3eb10f0525f7a4b15dbcb2b (diff)
prevent prepocessor comparisons against empty tokens
Diffstat (limited to 'ndbm.h')
-rw-r--r--ndbm.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/ndbm.h b/ndbm.h
index 5a873c0..39f1d1e 100644
--- a/ndbm.h
+++ b/ndbm.h
@@ -27,6 +27,11 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
+#if defined _XOPEN_SOURCE && _XOPEN_SOURCE - 1 < 0
+#undef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 400
+#endif
+
#if (defined _XOPEN_SOURCE && ((defined _XOPEN_SOURCE_EXTENDED && _XOPEN_SOURCE_EXTENDED == 1) || 500 <= _XOPEN_SOURCE))
/* ./src/ndbm/DBM_INSERT.c */
#define DBM_INSERT 1