[Buildroot] [RFC/PATCH 1/1] gst-fsl-plugins: fix compile for sysroot based on newer linux kernel headers

[Peter Seiderer]

The v4l2 ioctl VIDIOC_DBG_G_CHIP_IDENT was removed in linux-3.11 (see [1]/[2]).

To avoid build failure of the gst-fsl-plugins/mfw_gst_v4lsrc with toolchains based
on newer linux kernel headers this patch gives the include of the custom linux
kernel headers precedence over the sysroot linux kernel headers (oposed to the
previous behavior).

Fixes the following compile error with buildroot/glibc toolchain:

mfw_gst_v4lsrc.c: In function 'mfw_gst_v4lsrc_capture_setup':
mfw_gst_v4lsrc.c:452:10: error: variable 'chip' has initializer but incomplete type
   struct v4l2_dbg_chip_ident chip = {0};
          ^
mfw_gst_v4lsrc.c:452:10: warning: excess elements in struct initializer [enabled by default]
mfw_gst_v4lsrc.c:452:10: warning: (near initialization for 'chip') [enabled by default]
mfw_gst_v4lsrc.c:452:30: error: storage size of 'chip' isn't known
   struct v4l2_dbg_chip_ident chip = {0};
                              ^
mfw_gst_v4lsrc.c:464:22: error: 'VIDIOC_DBG_G_CHIP_IDENT' undeclared (first use in this function)
   if (ioctl (fd_v4l, VIDIOC_DBG_G_CHIP_IDENT, &chip)) {
                      ^

[1] http://www.spinics.net/lists/linux-media/msg64081.html
[2] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/include/uapi/linux/videodev2.h?id=b71c99801e18eb172ae34851daf25044a3bf644a

Signed-off-by: Peter Seiderer <ps.report at gmx.net>
---
 package/gstreamer/gst-fsl-plugins/gst-fsl-plugins.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/gstreamer/gst-fsl-plugins/gst-fsl-plugins.mk b/package/gstreamer/gst-fsl-plugins/gst-fsl-plugins.mk
index ccdb521..610bd78 100644
--- a/package/gstreamer/gst-fsl-plugins/gst-fsl-plugins.mk
+++ b/package/gstreamer/gst-fsl-plugins/gst-fsl-plugins.mk
@@ -23,7 +23,7 @@ GST_FSL_PLUGINS_CONF_ENV = PLATFORM=$(BR2_PACKAGE_GST_FSL_PLUGINS_PLATFORM)
 
 # needs access to imx-specific kernel headers
 GST_FSL_PLUGINS_DEPENDENCIES += linux
-GST_FSL_PLUGINS_CONF_ENV += CPPFLAGS="$(TARGET_CPPFLAGS) -idirafter $(LINUX_DIR)/include"
+GST_FSL_PLUGINS_CONF_ENV += CPPFLAGS="$(TARGET_CPPFLAGS) -I$(LINUX_DIR)/include"
 
 ifeq ($(BR2_PACKAGE_XLIB_LIBX11),y)
 GST_FSL_PLUGINS_DEPENDENCIES += xlib_libX11
-- 
1.8.1.4