Tests/RunCMake/try_compile/NoOutputVariable2.cmake - third_party/github.com/Kitware/CMake - Git at Google

 include(${CMAKE_CURRENT_SOURCE_DIR}/${try_compile_DEFS})
 try_compile(RESULT ${try_compile_bindir_or_SOURCES}
   ${CMAKE_CURRENT_SOURCE_DIR}/src.c
   OUTPUT_VARIABLE CMAKE_FLAGS -DA=B)
	include(${CMAKE_CURRENT_SOURCE_DIR}/${try_compile_DEFS})
	try_compile(RESULT ${try_compile_bindir_or_SOURCES}
	${CMAKE_CURRENT_SOURCE_DIR}/src.c
	OUTPUT_VARIABLE CMAKE_FLAGS -DA=B)