cmake PMP fetch FlameGraph to build directory

platforms/nuttx/CMakeLists.txt

@@ -281,9 +281,21 @@ add_custom_target(debug
 	DEPENDS ${FW_NAME} ${CMAKE_CURRENT_BINARY_DIR}/.gdbinit
 	USES_TERMINAL
 	)
-	
+
+# Poor man's profiler
+include(ExternalProject)
+ExternalProject_Add(FlameGraph
+	GIT_REPOSITORY "https://github.com/brendangregg/FlameGraph.git"
+	UPDATE_COMMAND ""
+	PATCH_COMMAND ""
+	CONFIGURE_COMMAND ""
+	BUILD_COMMAND ""
+	INSTALL_COMMAND ""
+	EXCLUDE_FROM_ALL 1
+	)
+
 add_custom_target(profile
-	COMMAND ${PX4_SOURCE_DIR}/platforms/nuttx/Debug/poor-mans-profiler.sh --elf=$<TARGET_FILE:${FW_NAME}> --nsamples=10000
-	DEPENDS ${FW_NAME} ${PX4_SOURCE_DIR}/platforms/nuttx/Debug/poor-mans-profiler.sh
+	COMMAND ${CMAKE_COMMAND} -E env PATH="${PX4_BINARY_DIR}/external/Source/FlameGraph:$ENV{PATH}" ${PX4_SOURCE_DIR}/platforms/nuttx/Debug/poor-mans-profiler.sh --elf=$<TARGET_FILE:${FW_NAME}> --nsamples=10000
+	DEPENDS ${FW_NAME} ${PX4_SOURCE_DIR}/platforms/nuttx/Debug/poor-mans-profiler.sh FlameGraph
 	USES_TERMINAL
 	)