pull in sys/sysmacros.h when available

This header provides major/minor/makedev funcs under most Linux C
libs.  Pull it in to fix building with newer versions that drop the
implicit include via sys/types.h.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94231
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

configure.ac

@@ -53,7 +53,8 @@ AC_USE_SYSTEM_EXTENSIONS
 AC_SYS_LARGEFILE
 AC_FUNC_ALLOCA
 
-AC_CHECK_HEADERS([sys/mkdev.h sys/sysctl.h sys/select.h])
+AC_HEADER_MAJOR
+AC_CHECK_HEADERS([sys/sysctl.h sys/select.h])
 
 # Initialize libtool
 LT_PREREQ([2.2])

libkms/linux.c

@@ -41,9 +41,12 @@
 #include <unistd.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#ifdef HAVE_SYS_MKDEV_H
+#ifdef MAJOR_IN_MKDEV
 #include <sys/mkdev.h>
 #endif
+#ifdef MAJOR_IN_SYSMACROS
+#include <sys/sysmacros.h>
+#endif
 
 #include "libdrm_macros.h"
 #include "internal.h"

xf86drm.c

@@ -54,8 +54,11 @@
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <stdarg.h>
-#ifdef HAVE_SYS_MKDEV_H
-# include <sys/mkdev.h> /* defines major(), minor(), and makedev() on Solaris */
+#ifdef MAJOR_IN_MKDEV
+#include <sys/mkdev.h>
+#endif
+#ifdef MAJOR_IN_SYSMACROS
+#include <sys/sysmacros.h>
 #endif
 #include <math.h>