makedev(3): Use <sys/sysmacros.h> in SYNOPSIS

Defining these functions via <sys/types.h> causes problems for
some folk. As noted by Zack Wein:

    libstdc++ force-enables _GNU_SOURCE, which means people
    writing in C++ _can't_ avoid these nonstandard macros by
    using a strict conformance mode.

Since glibc has basically always used <sys/sysmacros.h>,
update the docs to have people include that instead.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/makedev.3

@@ -28,23 +28,13 @@
 makedev, major, minor \- manage a device number
 .SH SYNOPSIS
 .nf
-.B #include <sys/types.h>
+.B #include <sys/sysmacros.h>
 
 .BI "dev_t makedev(unsigned int " maj ", unsigned int " min );
 
 .BI "unsigned int major(dev_t " dev );
 .BI "unsigned int minor(dev_t " dev );
 .fi
-.sp
-.BR makedev (),
-.BR major (),
-.BR minor ():
-.nf
-    Since glibc 2.19:
-        _DEFAULT_SOURCE
-    In glibc up to and including 2.19:
-        _BSD_SOURCE
-.fi
 .SH DESCRIPTION
 A device ID consists of two parts:
 a major ID, identifying the class of the device,
@@ -90,7 +80,9 @@ and
 .BR minor ()
 functions are not specified in POSIX.1,
 but are present on many other systems.
-.\" The BSDs, HP-UX, Solaris, AIX, Irix
+.\" The BSDs, HP-UX, Solaris, AIX, Irix.
+.\" The header location is inconsistent:
+.\" Could be sys/mkdev.h, sys/sysmacros.h, or sys/types.h.
 .SH NOTES
 These interfaces are defined as macros.
 Since glibc 2.3.3,