[Bug 796205] New: testegl.c not building on rpi

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796205

            Bug ID: 796205
           Summary: testegl.c not building on rpi
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-omx
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: gdesmott at gnome.org
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Trying to build gst-omx on the rpi:

testegl.c:68:22: fatal error: bcm_host.h: No such file or directory

This file is provided in /opt/vc/include/bcm_host.h

I tried passing -I/opt/vc/include/ so it can find it but then I'm hitting multi
declarations in their EGL headers:

In file included from /opt/vc/include/interface/vcos/vcos.h:118:0,
                 from /opt/vc/include/interface/vmcs_host/vc_dispmanx.h:33,
                 from /opt/vc/include/EGL/eglplatform.h:110,
                 from /opt/vc/include/EGL/egl.h:36,
                 from testegl.c:42:
/opt/vc/include/interface/vcos/pthreads/vcos_platform.h:792:23: error:
redundant redeclaration of ‘_vcos_thread_sem_wait’ [-Werror=redundant-decls]
 VCOS_INLINE_DECL void _vcos_thread_sem_wait(void);
                       ^~~~~~~~~~~~~~~~~~~~~
/opt/vc/include/interface/vcos/pthreads/vcos_platform.h:644:6: note: previous
definition of ‘_vcos_thread_sem_wait’ was here
 void _vcos_thread_sem_wait(void) {

I'm not familiar with the rpi headers so I'm not sure of what's the proper fix
here.

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