add_library(empty1 empty.cpp) | |
add_library(empty2 INTERFACE) | |
add_library(empty3 INTERFACE) | |
target_compile_features(empty3 INTERFACE cxx_std_11) | |
target_link_libraries(empty1 | |
# When starting, $<COMPILE_FEATURES:cxx_std_11> is '0', so 'freeze' the | |
# CXX_STANDARD at 98 during computation. | |
$<$<COMPILE_FEATURES:cxx_std_11>:empty2> | |
# This would add cxx_std_11, but that would require CXX_STANDARD = 11, | |
# which is not allowed after freeze. Report an error. | |
empty3 | |
) |