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-rw-r--r--include/features.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/features.h b/include/features.h
index 0af6bf43b..07d19f1f5 100644
--- a/include/features.h
+++ b/include/features.h
@@ -280,6 +280,14 @@
# define __GLIBC_MINOR__ 2
#endif
+/*
+ * NPTL requires this to be defined. Unfortunately, due to complexities
+ * in include dependencies, this cannot be defined on a per file basis.
+ */
+#ifdef __PTHREADS_NATIVE__
+# define __USE_XOPEN2K 1
+#endif
+
/* Convenience macros to test the versions of glibc and gcc.
Use them like this:
#if __GNUC_PREREQ (2,8)