Qt gst插件良好构建失败，出现错误：‘；GLsync&x2019；尚未申报

当我在另一台ARM机器上为Raspberry Pi构建

gst插件good==1.16.2

时，Qt插件构建失败

我成功构建了

gstreamer==1.16.2

和

gst插件base==1.16.2

和

qtbase==5.13.2

，但它们似乎与

gst插件good==1.16.2

不兼容：

In file included from gstqtgl.h:32:0,
                 from qtwindow.h:27,
                 from moc_qtwindow.cc:10:
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:17: error: expected identifier before ‘*’ token
   ret (GSTGLAPI *name) args;
                 ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:27:1: note: in expansion of macro ‘GST_GL_EXT_FUNCTION’
 GST_GL_EXT_FUNCTION (GLsync, FenceSync,
 ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:29:39: error: ISO C++ forbids declaration of ‘GLsync’ with no type [-fpermissive]
                       GLbitfield flags))
                                       ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:24: note: in definition of macro ‘GST_GL_EXT_FUNCTION’
   ret (GSTGLAPI *name) args;
                        ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:29:39: error: ‘GLsync’ declared as function returning a function
                       GLbitfield flags))
                                       ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:24: note: in definition of macro ‘GST_GL_EXT_FUNCTION’
   ret (GSTGLAPI *name) args;
                        ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:31:23: error: ‘GLsync’ has not been declared
                      (GLsync sync))
                       ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:24: note: in definition of macro ‘GST_GL_EXT_FUNCTION’
   ret (GSTGLAPI *name) args;
                        ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:33:23: error: ‘GLsync’ has not been declared
                      (GLsync sync))
                       ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:24: note: in definition of macro ‘GST_GL_EXT_FUNCTION’
   ret (GSTGLAPI *name) args;
                        ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:35:23: error: ‘GLsync’ has not been declared
                      (GLsync sync,
                       ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:24: note: in definition of macro ‘GST_GL_EXT_FUNCTION’
   ret (GSTGLAPI *name) args;
                        ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:39:23: error: ‘GLsync’ has not been declared
                      (GLsync sync,
                       ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:24: note: in definition of macro ‘GST_GL_EXT_FUNCTION’
   ret (GSTGLAPI *name) args;
                        ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/glprototypes/sync.h:43:23: error: ‘GLsync’ has not been declared
                      (GLsync sync,
                       ^
/build/snaps/full/stage/include/gstreamer-1.0/gst/gl/gstglfuncs.h:93:24: note: in definition of macro ‘GST_GL_EXT_FUNCTION’
   ret (GSTGLAPI *name) args;
                        ^
Makefile:881: recipe for target 'libgstqmlgl_la-moc_gstqsgtexture.lo' failed

我在中看到了一个非常类似的问题，但在我的代码中，他们想要删除的行已经丢失了

相反，我从中删除了

#define GST\u GL\u HAVE\u GLSYNC 1

，编译成功

但是上面的评论说它应该使用Qt的GLsync定义，这样我的“修复”看起来就不正确了

---

我仍在努力为这个问题找到合适的解决方案。

我发现，在Raspberry Pi设备上使用补丁不会破坏任何东西

diff -Naur ./src/ext/qt/gstqtgl.h ./src2/ext/qt/gstqtgl.h
--- ./ext/qt/gstqtgl.h      2019-04-19 09:16:25.000000000 +0000
+++ ./ext/qt/gstqtgl.h      2019-12-15 09:22:22.503065057 +0000
@@ -28,7 +28,6 @@
  * that we don't typedef GLsync in gstglfuncs.h */
 #include <gst/gl/gstglconfig.h>
 #undef GST_GL_HAVE_GLSYNC
-#define GST_GL_HAVE_GLSYNC 1
 #include <gst/gl/gstglfuncs.h>

 /* The glext.h guard was renamed in 2018, but some software which

diff-Naur./src/ext/qt/gstqtgl.h./src2/ext/qt/gstqtgl.h
---/ext/qt/gstqtgl.h 2019-04-19 09:16:25.000000000+0000
+++/ext/qt/gstqtgl.h 2019-12-15 09:22:22.503065057+0000
@@ -28,7 +28,6 @@
*我们没有在gstglfuncs.h中键入def GLsync*/
#包括
#未定义GST\u GL\u HAVE\u GLSYNC
-#定义GST\u总账\u是否有GLSYNC 1
#包括
/*glext.h guard于2018年更名，但一些软件

我希望如果有人遇到麻烦，这会有所帮助

如果有东西坏了，我会更新这篇文章