cmake: fix the creation dummy main to avoid rebuilding
@@ -188,7 +188,10 @@ function(idf_add_executable)
# Create a dummy file to work around CMake requirement of having a source
# file while adding an executable
add_executable(${exe_target} "${CMAKE_CURRENT_BINARY_DIR}/dummy_main_src.c")
- file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/dummy_main_src.c)
+ add_custom_command(OUTPUT dummy_main_src.c
+ COMMAND ${CMAKE_COMMAND} -E touch dummy_main_src.c
+ WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+ VERBATIM)
add_custom_target(dummy_main_src DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/dummy_main_src.c)
