pkg/48735: x11/libdrm 2.4.53 libkms_vmwgfx.c fix for ERESTART undefined for userland on DragonFly 3.7

[davshao%gmail.com@localhost]

>Number:         48735
>Category:       pkg
>Synopsis:       x11/libdrm 2.4.53 libkms_vmwgfx.c fix for ERESTART undefined 
>for userland on DragonFly 3.7
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 12 05:25:00 +0000 2014
>Originator:     David Shao
>Release:        DragonFly 3.7-DEVELOPMENT
>Organization:
>Environment:
DragonFly  3.7-DEVELOPMENT DragonFly v3.7.1.1070.g15160-DEVELOPMENT #2: Fri Apr 
11 20:47:07 PDT 2014     xxxxx@:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
>Description:
For current cvs pkgsrc on DragonFly 3.7-DEVELOPMENT and perhaps other BSDs, 
ERESTART is not defined for userland programs instead being defined in errno.h 
only for
#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)

In any case the DragonFly value of (-1) for ERESTART differs from Linux's.  As 
DragonFly does not even implement KMS for VMWare vmx graphics its value can 
basically be anything as long as it is defined.  Without some definition 
building libdrm 2.4.53 fails with

Making all in libkms
  CC       linux.lo
  CC       intel.lo
  CC       dumb.lo
  CC       api.lo
  CC       vmwgfx.lo
vmwgfx.c: In function 'vmwgfx_bo_create':
vmwgfx.c:107:20: error: 'ERESTART' undeclared (first use in this function)
vmwgfx.c:107:20: note: each undeclared identifier is reported only once for 
each function it appears in
 
>How-To-Repeat:

>Fix:
Adding the following patch and regenerating the checksums with
bmake makepatchsum
allows libdrm to be built.  Of course in the DragonFly context the value of 85 
is meaningless and can be replaced with almost anything.

$NetBSD$

--- libkms/vmwgfx.c.orig        2013-08-12 18:01:22.000000000 +0000
+++ libkms/vmwgfx.c
@@ -38,6 +38,10 @@
 #include "xf86drm.h"
 #include "vmwgfx_drm.h"

+#ifndef ERESTART
+#define ERESTART 85
+#endif
+
 struct vmwgfx_bo
 {
        struct kms_bo base;