project(foo)

add_executable(foo_exe)
target_sources(foo_exe PRIVATE main.c)

# Uncomment these 2 lines to make the "LANGUAG" work
#get_source_file_property(_LOCATION main.c LOCATION)
#message("LOCATION: ${_LOCATION}")

get_source_file_property(_LANGUAGE main.c LANGUAGE)
message("LANGUAGE: ${_LANGUAGE}")