opencv: update rule to compile opencv with tbb.

rules/opencv/default.bash

@@ -24,6 +24,12 @@ maintainer=\
     'Renato Caldas <rmsc@fe.up.pt>'
 )
 
+post_unpack()
+{
+    wget "http://lsts.pt/glued/tbb43_20141204oss_src.tgz"
+    mv tbb43_20141204oss_src.tgz "3rdparty/tbb/"
+}
+
 configure()
 {
     LINKER_ADDED_FLAGS="-Wl,-rpath,${cfg_dir_rootfs}/usr/lib"
@@ -50,6 +56,8 @@ configure()
     -DBUILD_SHARED_LIBS=ON \
     -DBUILD_TESTS=OFF \
     -DBUILD_WITH_DEBUG_INFO=OFF \
+    -DBUILD_TBB=ON \
+    -DWITH_TBB=ON \
     ../opencv-$version/
 }
 
@@ -75,4 +83,7 @@ target_install()
             $cmd_target_strip -v "$f" -o "$cfg_dir_rootfs/usr/lib/$(basename "$f")"
         fi
     done
+
+    $cmd_cp -r "${pkg_build_dir}/../build/lib/"libtbb.so "$cfg_dir_rootfs/usr/lib/"
+    $cmd_cp -r "${pkg_build_dir}/../build/lib/"libtbb.so "$cfg_dir_toolchain_sysroot/usr/lib/"
 }