.br
.nf
-.B " #define _GNU_SOURCE"
+.\"O .BR " #define _GNU_SOURCE" " /* See feature_test_macros(7) */"
+.BR " #define _GNU_SOURCE" " /* feature_test_macros(7) »²¾È */"
.br
.B " #include <string.h>"
.\"O .SH "SEE ALSO"
.SH ´ØÏ¢¹àÌÜ
.BR basename (1),
-.BR dirname (1),
-.BR feature_test_macros (7)
+.BR dirname (1)