set(CMAKE_SYSTEM_NAME Linux) set(CMAKE_SYSTEM_VERSION 1) set(CMAKE_SYSTEM_PROCESSOR "i686") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32" CACHE STRING "c++ flags") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32" CACHE STRING "c flags") set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -m32" CACHE STRING "asm flags")