nl_langinfo.3: Note feature test macro requirements for nl_langinfo_l()

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man3/nl_langinfo.3 b/man3/nl_langinfo.3
index ac5db09fe988d738a12e47d80abcc01ec35dfa31..cf70eed743b244d33685ce4336e596efbe8ab5a5 100644 (file)
--- a/man3/nl_langinfo.3
+++ b/man3/nl_langinfo.3
@@ -26,6 +26,22 @@ nl_langinfo, nl_langinfo_l \- query language and locale information
 .sp
 .BI "char *nl_langinfo_l(nl_item " item ", locale_t " locale );
 .fi
+.sp
+.in -4n
+Feature Test Macro Requirements for glibc (see
+.BR feature_test_macros (7)):
+.in
+.sp
+.ad l
+.BR nl_langinfo_l ():
+.RS 4
+Since glibc 2.24:
+    _POSIX_C_SOURCE\ >=\ 200809L
+.br
+Glibc 2.23 and earlier:
+    _POSIX_C_SOURCE\ >=\ 200112L
+.RE
+.ad b
 .SH DESCRIPTION
 The
 .BR nl_langinfo ()