My mistake, you want something like this:
TRY_COMPILE(RESULT ${PROJECT_BINARY_DIR}
${PROJECT_SOURCE_DIR}/teste.cpp
CMAKE_FLAGS
COMPILE_DEFINITIONS -I${QT_INCLUDE_DIR}
-I${QT_QTCORE_INCLUDE_DIR}
CMAKE_FLAGS
"-DLINK_LIBRARIES:STRING=${QT_QTCORE_LIBRARY}"
OUTPUT_VARIABLE MY_OUT
)
-Bill