.\"O .SH SYNOPSIS
.SH ½ñ¼°
.nf
-.B #define _ISOC99_SOURCE
+.\"O .BR "#define _ISOC99_SOURCE" " /* See feature_test_macros(7) */"
+.BR "#define _ISOC99_SOURCE" " /* feature_test_macros(7) »²¾È */"
.br
.B #include <math.h>
.sp
.\"O .SH "SEE ALSO"
.SH ´ØÏ¢¹àÌÜ
.BR fpclassify (3),
-.BR feature_test_macros (7),
.BR math_error (7)