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-rw-r--r--libjava/java/lang/fdlibm.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/libjava/java/lang/fdlibm.h b/libjava/java/lang/fdlibm.h
index b98120dafb9..fbfbb660bfd 100644
--- a/libjava/java/lang/fdlibm.h
+++ b/libjava/java/lang/fdlibm.h
@@ -11,6 +11,10 @@
* ====================================================
*/
+/* AIX needs _XOPEN_SOURCE */
+#ifdef _AIX
+#define _XOPEN_SOURCE
+#endif
#include <config.h>
#include <stdlib.h>
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