https://bugs.gentoo.org/580392

fixed in upstream here:
	https://cgit.freedesktop.org/mesa/mesa/commit/?id=20553e4a2d952f6dc37f40f63d2c86b0718c58f9

this is a hack for the 12.0 branch

--- a/src/gallium/winsys/svga/drm/vmw_screen.c
+++ b/src/gallium/winsys/svga/drm/vmw_screen.c
@@ -31,6 +31,9 @@
 #include "pipe/p_compiler.h"
 #include "util/u_hash_table.h"
 #include <sys/types.h>
+#ifdef __linux__
+#include <sys/sysmacros.h>
+#endif
 #include <sys/stat.h>
 #include <unistd.h>
 
--- a/src/gbm/main/gbm.c
+++ b/src/gbm/main/gbm.c
@@ -31,6 +31,9 @@
 #include <stdint.h>
 
 #include <sys/types.h>
+#ifdef __linux__
+#include <sys/sysmacros.h>
+#endif
 #include <sys/stat.h>
 #include <unistd.h>
 #include <errno.h>
--- a/src/loader/loader.c
+++ b/src/loader/loader.c
@@ -80,6 +80,9 @@
 #include "xmlpool.h"
 #endif
 #endif
+#ifdef __linux__
+#include <sys/sysmacros.h>
+#endif
 #ifdef HAVE_SYSFS
 #include <sys/types.h>
 #endif