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-rw-r--r--man3/initgroups.35
1 files changed, 4 insertions, 1 deletions
diff --git a/man3/initgroups.3 b/man3/initgroups.3
index 7c0e394641..4471815ca8 100644
--- a/man3/initgroups.3
+++ b/man3/initgroups.3
@@ -46,7 +46,10 @@ Feature Test Macro Requirements for glibc (see
.in
.sp
.BR initgroups ():
-_BSD_SOURCE
+ Since glibc 2.19:
+ _DEFAULT_SOURCE
+ Glibc 2.19 and earlier:
+ _BSD_SOURCE
.SH DESCRIPTION
The
.BR initgroups ()