输出错误
message(FATAL_ERROR "
FATAL: In-source builds are not allowed.
You should create a separate directory for build files.
")
FATAL_ERROR 是错误关键字。
输出警告
message(WARNING "OpenCV requires Android SDK tools revision 14 or newer. Otherwise tests and samples will no be compiled.")
WARNING 是警告关键字。
输出正常
message(STATUS "Can't detect runtime and/or arch")
STATUS