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-rw-r--r--config/linux7
1 files changed, 7 insertions, 0 deletions
diff --git a/config/linux b/config/linux
index cce57449c8bb..0863beb05cb2 100644
--- a/config/linux
+++ b/config/linux
@@ -83,9 +83,16 @@
*
* The more recent defaults for gcc (e.g. on Red Hat 7.0)
* also define _POSIX_C_SOURCE, which throws our code off.
+ *
+ * _BSD_SOURCE and _SVID_SOURCE have become deprecated
+ * aliases for _DEFAULT_SOURCE. _DEFAULT_SOURCE overrides
+ * __STRICT_ANSI__ also. [gcc 8.3.0 on Debian 10]
*/
#define __STRICT_ANSI__
+#ifndef _DEFAULT_SOURCE
+# define _DEFAULT_SOURCE
+#endif
#ifndef _BSD_SOURCE
# define _BSD_SOURCE
#endif