gnu: xf86-video-qxl: Fix build.

* gnu/packages/patches/xf86-video-qxl-fix-build.patch: Add patch.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/xorg.scm (xf86-video-qxl): Apply it.

gnu/local.mk

@@ -1923,6 +1923,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/xf86-video-mach64-bool-to-boolean.patch	\
   %D%/packages/patches/xf86-video-mach64-glibc-2.20.patch	\
   %D%/packages/patches/xf86-video-nouveau-fixup-ABI.patch	\
+  %D%/packages/patches/xf86-video-qxl-fix-build.patch	\
   %D%/packages/patches/xf86-video-savage-xorg-compat.patch 	\
   %D%/packages/patches/xf86-video-siliconmotion-fix-ftbfs.patch \
   %D%/packages/patches/xf86-video-tga-remove-mibstore.patch	\

gnu/packages/patches/xf86-video-qxl-fix-build.patch

@@ -0,0 +1,101 @@
+From 4b083ede3c4a827a84295ff223e34ee3c2e581b2 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Zolt=C3=A1n=20B=C3=B6sz=C3=B6rm=C3=A9nyi?=
+ <zboszor@gmail.com>
+Date: Sat, 28 Aug 2021 15:38:40 +0200
+Subject: [PATCH] Fix a build  error with Xorg master
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Use xf86ReturnOptValBool() in get_bool_option() instead of
+options[option_index].value.bool to fix a compiler error with
+current Xorg xserver master branch.
+
+Also use xf86GetOptValInteger() in get_int_option() and
+xf86GetOptValString() in get_str_option() for consistency.
+
+The change causes a slight performance drop during option parsing
+because the passed-in index_value is no longer used as an index
+into the options array.
+
+Instead, it's used as a token now for the standard option getter
+functions which works since the index_value to the get_*_option()
+functions are identical to the value of options[n].token in the
+passed-in OptionInfoRec array.
+
+Also rename "int option_index" to "int token" for clarity in all
+three functions.
+
+Signed-off-by: Zoltán Böszörményi <zboszor@gmail.com>
+---
+ src/qxl_option_helpers.c | 13 +++++++------
+ src/qxl_option_helpers.h |  6 +++---
+ 2 files changed, 10 insertions(+), 9 deletions(-)
+
+diff --git a/src/qxl_option_helpers.c b/src/qxl_option_helpers.c
+index 2aba677..7707b7c 100644
+--- a/src/qxl_option_helpers.c
++++ b/src/qxl_option_helpers.c
+@@ -10,31 +10,32 @@
+ 
+ #include "qxl_option_helpers.h"
+ 
+-int get_int_option(OptionInfoPtr options, int option_index,
++int get_int_option(OptionInfoPtr options, int token,
+                    const char *env_name)
+ {
++    int value;
+     if (env_name && getenv(env_name)) {
+         return atoi(getenv(env_name));
+     }
+-    return options[option_index].value.num;
++    return xf86GetOptValInteger(options, token, &value) ? value : 0;
+ }
+ 
+-const char *get_str_option(OptionInfoPtr options, int option_index,
++const char *get_str_option(OptionInfoPtr options, int token,
+                            const char *env_name)
+ {
+     if (getenv(env_name)) {
+         return getenv(env_name);
+     }
+-    return options[option_index].value.str;
++    return xf86GetOptValString(options, token);
+ }
+ 
+-int get_bool_option(OptionInfoPtr options, int option_index,
++int get_bool_option(OptionInfoPtr options, int token,
+                      const char *env_name)
+ {
+     const char* value = getenv(env_name);
+ 
+     if (!value) {
+-        return options[option_index].value.bool;
++        return xf86ReturnOptValBool(options, token, FALSE);
+     }
+     if (strcmp(value, "0") == 0 ||
+         strcasecmp(value, "off") == 0 ||
+diff --git a/src/qxl_option_helpers.h b/src/qxl_option_helpers.h
+index 7c54c72..66d0a17 100644
+--- a/src/qxl_option_helpers.h
++++ b/src/qxl_option_helpers.h
+@@ -4,13 +4,13 @@
+ #include <xf86Crtc.h>
+ #include <xf86Opt.h>
+ 
+-int get_int_option(OptionInfoPtr options, int option_index,
++int get_int_option(OptionInfoPtr options, int token,
+                    const char *env_name);
+ 
+-const char *get_str_option(OptionInfoPtr options, int option_index,
++const char *get_str_option(OptionInfoPtr options, int token,
+                            const char *env_name);
+ 
+-int get_bool_option(OptionInfoPtr options, int option_index,
++int get_bool_option(OptionInfoPtr options, int token,
+                      const char *env_name);
+ 
+ #endif // OPTION_HELPERS_H
+-- 
+GitLab
+

gnu/packages/xorg.scm

@@ -3210,7 +3210,9 @@ UniChrome Pro and Chrome9 integrated graphics processors.")
                 "xf86-video-qxl-" version ".tar.bz2"))
               (sha256
                (base32
-                "14jc24znnahhmz4kqalafmllsg8awlz0y6gpgdpk5ih38ph851mi"))))
+                "14jc24znnahhmz4kqalafmllsg8awlz0y6gpgdpk5ih38ph851mi"))
+              (patches (search-patches
+                        "xf86-video-qxl-fix-build.patch"))))
     (build-system gnu-build-system)
     (inputs
       (list libxfont2 spice-protocol xorg-server xorgproto))