Tests/CMakeCommands/target_compile_options/consumer.cpp

#ifdef DO_GNU_TESTS

#  ifdef MY_PRIVATE_DEFINE
#  error Unexpected MY_PRIVATE_DEFINE
#  endif

#  ifndef MY_PUBLIC_DEFINE
#  error Expected MY_PUBLIC_DEFINE
#  endif

#  ifndef MY_INTERFACE_DEFINE
#  error Expected MY_INTERFACE_DEFINE
#  endif

#endif

#ifdef TEST_LANG_DEFINES
  #ifndef CONSUMER_LANG_CXX
  #error Expected CONSUMER_LANG_CXX
  #endif

  #ifdef CONSUMER_LANG_C
  #error Unexpected CONSUMER_LANG_C
  #endif

  #if !LANG_IS_CXX
  #error Expected LANG_IS_CXX
  #endif

  #if LANG_IS_C
  #error Unexpected LANG_IS_C
  #endif
#endif

int main() { return 0; }