Another attempt to fix the build problem in the shmem code.

src/platforms/posix/px4_layer/CMakeLists.txt

@@ -31,13 +31,12 @@
 #
 ############################################################################
 
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/cmake_hexagon")
-include(hexagon_sdk)
-
-include_directories(${CMAKE_BINARY_DIR}/src/firmware/posix)
-include_directories(${HEXAGON_SDK_INCLUDES})
-
 if("${CONFIG_SHMEM}" STREQUAL "1")
+	set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/cmake_hexagon")
+	include(hexagon_sdk)
+
+	include_directories(${CMAKE_BINARY_DIR}/src/firmware/posix)
+	include_directories(${HEXAGON_SDK_INCLUDES})
 	list(APPEND SHMEM_SRCS
 		shmem_posix.c
 	)