COMPILE_FEATURES: Error on features from non-enabled language
Consider this example:
$ cat ../CMakeLists.txt cmake_minimum_required(VERSION 3.12) project(Issue20438 C) # Simulate imported target from a find_package() call. # In practice this would be a real library. add_library(has_CXX_and_C_bindings INTERFACE IMPORTED) set_property(TARGET has_CXX_and_C_bindings PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_11) # C-only application add_executable(main main.c) target_link_libraries(main PRIVATE has_CXX_and_C_bindings) $ cmake .. ... CMake Error in CMakeLists.txt: Cannot use features from non-enabled language CXX
The client application uses only the C interface from the library and does not compile any C++ code, but cannot use the library due to the mere mention of
cxx_* compile features.
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