boringssl/util/32-bit-toolchain.cmake

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 1)
set(CMAKE_SYSTEM_PROCESSOR "x86")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32 -msse2" CACHE STRING "c++ flags")
set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -m32 -msse2" CACHE STRING "c flags")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -m32 -msse2" CACHE STRING "asm flags")