cmake DH_HAVE_BOOST examples

Qihoo360/evpp evpp/CMakeLists.txt :36 

target_compile_definitions(evpp_boost PRIVATE -DH_HAVE_BOOST=1)

Qihoo360/evpp evpp/CMakeLists.txt :37 

target_compile_definitions(evpp_boost_static PRIVATE -DH_HAVE_BOOST=1)