[Buildroot] [git commit] motion: fix sdl-config detection

[Buildroot] [git commit] motion: fix sdl-config detection

[Thomas Petazzoni]

commit: https://git.buildroot.net/buildroot/commit/?id=8ae6e3bc9f54bfc94f003e3ad81a98c738b78572
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

Overwrite ac_cv_path_CONFIG_SDL in case sdl development is
installed on the host.

Fixes [1]:

  ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include/SDL'

[1] http://autobuild.buildroot.net/results/459/4592eb83efa393f77f5ee014f93a271f2313bee6

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/motion/motion.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/package/motion/motion.mk b/package/motion/motion.mk
index de29a2a..cf9be76 100644
--- a/package/motion/motion.mk
+++ b/package/motion/motion.mk
@@ -54,6 +54,9 @@ endif
 ifeq ($(BR2_PACKAGE_SDL),y)
 MOTION_DEPENDENCIES += sdl
 MOTION_CONF_OPTS += --with-sdl=$(STAGING_DIR)/usr
+# overwrite ac_cv_path_CONFIG_SDL in case sdl development is
+# installed on the host
+MOTION_CONF_ENV += ac_cv_path_CONFIG_SDL=$(STAGING_DIR)/usr/bin/sdl-config
 else
 MOTION_CONF_OPTS += --without-sdl
 endif