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-rw-r--r--man3/ttyslot.38
1 files changed, 6 insertions, 2 deletions
diff --git a/man3/ttyslot.3 b/man3/ttyslot.3
index 63388bafff..71143b58c5 100644
--- a/man3/ttyslot.3
+++ b/man3/ttyslot.3
@@ -43,9 +43,13 @@ Feature Test Macro Requirements for glibc (see
.ad l
.BR ttyslot ():
.RS 4
-_BSD_SOURCE ||
+Since glibc 2.20:
+ _BSD_SOURCE ||
+ _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_\ <\ 500
.br
-_XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_\ <\ 500\ &&\ _XOPEN_SOURCE_EXTENDED
+Glibc 2.19 and earlier:
+ _DEFAULT_SOURCE ||
+ _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_\ <\ 500
.RE
.ad b
.SH DESCRIPTION