.\"
.\" Corrected, aeb, 2002-05-30
.\"
-.TH A64L 3 2015-08-08 "" "Linux Programmer's Manual"
+.TH A64L 3 2016-03-15 "" "Linux Programmer's Manual"
.SH NAME
a64l, l64a \- convert between long and base-64
.SH SYNOPSIS
.br
.RS 4
.ad l
-_SVID_SOURCE || _XOPEN_SOURCE\ >=\ 500
+_XOPEN_SOURCE\ >=\ 500
.\" || _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
+ || /* Glibc since 2.19: */ _DEFAULT_SOURCE
+ || /* Glibc versions <= 2.19: */ _SVID_SOURCE
.RE
.ad
.SH DESCRIPTION