the roscpp_core packages are empty at the moment, but should be created anyway

recipes-ros/ros-cpp-common/ros-cpp-common_0.3.11.bb

@@ -11,6 +11,8 @@ S = "${WORKDIR}/roscpp_core-release-release-cpp_common-0.3.11"
 
 DEPENDS = "catkin-native"
 
+ALLOW_EMPTY = "1"
+
 EXTRA_OECMAKE = ""
 
 inherit cmake pythonnative

recipes-ros/roscpp-serialization/roscpp-serialization_0.3.12.bb

@@ -9,6 +9,8 @@ SRC_URI[sha256sum] = "27581440aabb75df787e850124daaec252fdca8f5b70f8a4996f82bb8e
 
 S = "${WORKDIR}/roscpp_core-release-release-roscpp_serialization-0.3.12"
 
+ALLOW_EMPTY = "1"
+
 DEPENDS = "catkin-native \
   ros-cpp-common \
   roscpp-traits \

recipes-ros/roscpp-traits/roscpp-traits_0.3.12.bb

@@ -9,6 +9,8 @@ SRC_URI[sha256sum] = "f35cd1e29b50a2ffd89b36a9c919653ba2f6242c4b92618b544ded4f00
 
 S = "${WORKDIR}/roscpp_core-release-release-roscpp_traits-0.3.12"
 
+ALLOW_EMPTY = "1"
+
 DEPENDS = "catkin-native"
 
 inherit cmake pythonnative