[Bug 797358] New: Util: Build error when GL is enabled while EGL is disabled

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797358

            Bug ID: 797358
           Summary: Util: Build error when GL is enabled while EGL is
                    disabled
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: junyan.he at hotmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

When we configure gstreamer-vaapi use glx and no egl

gstreamer-vaapi configuration summary:

Installation Prefix .............. : /home/robinhe/media/build
GStreamer API version ............ : 1.15
VA-API version ................... : 1.3.0
Video encoding ................... : yes
Video outputs .................... : x11 glx


We get build error:

gstvaapipluginutil.c: In function ‘gst_vaapi_get_display_type_from_gl_env’:
gstvaapipluginutil.c:174:22: error: unused variable ‘gl_platform_type’
[-Werror=unused-variable]
   const gchar *const gl_platform_type = g_getenv ("GST_GL_PLATFORM");
                      ^~~~~~~~~~~~~~~~
gstvaapipluginutil.c: In function ‘gst_vaapi_create_display_from_egl’:
gstvaapipluginutil.c:252:15: error: implicit declaration of function
‘gst_vaapi_display_egl_new_with_native_display’; did you mean
‘gst_vaapi_display_x11_new_with_va_display’?
[-Werror=implicit-function-declaration]
     display = gst_vaapi_display_egl_new_with_native_display
(native_display_egl,
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
               gst_vaapi_display_x11_new_with_va_display
gstvaapipluginutil.c:252:15: error: nested extern declaration of
‘gst_vaapi_display_egl_new_with_native_display’ [-Werror=nested-externs]
gstvaapipluginutil.c:252:13: error: assignment makes pointer from integer
without a cast [-Werror=int-conversion]
     display = gst_vaapi_display_egl_new_with_native_display
(native_display_egl,
             ^
gstvaapipluginutil.c:262:17: error: implicit declaration of function
‘gst_vaapi_display_egl_new’; did you mean ‘gst_vaapi_display_glx_new’?
[-Werror=implicit-function-declaration]
       display = gst_vaapi_display_egl_new (wrapped_display, gles_version);
                 ^~~~~~~~~~~~~~~~~~~~~~~~~
                 gst_vaapi_display_glx_new
gstvaapipluginutil.c:262:17: error: nested extern declaration of
‘gst_vaapi_display_egl_new’ [-Werror=nested-externs]
gstvaapipluginutil.c:262:15: error: assignment makes pointer from integer
without a cast [-Werror=int-conversion]
       display = gst_vaapi_display_egl_new (wrapped_display, gles_version);
               ^
gstvaapipluginutil.c:268:5: error: implicit declaration of function
‘gst_vaapi_display_egl_set_gl_context’; did you mean
‘gst_vaapi_plugin_base_set_gl_context’? [-Werror=implicit-function-declaration]
     gst_vaapi_display_egl_set_gl_context (GST_VAAPI_DISPLAY_EGL (display),
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     gst_vaapi_plugin_base_set_gl_context
gstvaapipluginutil.c:268:5: error: nested extern declaration of
‘gst_vaapi_display_egl_set_gl_context’ [-Werror=nested-externs]
gstvaapipluginutil.c:268:43: error: implicit declaration of function
‘GST_VAAPI_DISPLAY_EGL’; did you mean ‘GST_VAAPI_DISPLAY_GLX’?
[-Werror=implicit-function-declaration]
     gst_vaapi_display_egl_set_gl_context (GST_VAAPI_DISPLAY_EGL (display),
                                           ^~~~~~~~~~~~~~~~~~~~~
                                           GST_VAAPI_DISPLAY_GLX
gstvaapipluginutil.c:268:43: error: nested extern declaration of
‘GST_VAAPI_DISPLAY_EGL’ [-Werror=nested-externs]
cc1: all warnings being treated as errors

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