CMAKE 交叉编译

一般修改 CMAKE_SYSTEM_NAME， CMAKE_C_COMPILER
和 CMAKE_CXX_COMPILER 就够了。

比如，下面的一个 CMake 的 makefile文件：

########################################################################
# CMake build script for Google Mock.
#
# To run the tests for Google Mock itself on Linux, use 'make test' or
# ctest. You can select which tests to run using 'ctest -R regex'.
# For more options, run 'ctest --help'.

# BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to
# make it prominent in the GUI.

SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_C_COMPILER arm-linux-gnueabi-gcc)
SET(CMAKE_CXX_COMPILER arm-linux-gnueabi-g++)
#SET(CMAKE_FIND_ROOT_PATH /toolchain/arm-linux-4.8.2/arm-linux-gnueabi/sysroot)
option(BUILD_SHARED_LIBS "Build shared libraries (DLLs)." OFF)

option(gmock_build_tests "Build all of Google Mock's own tests." OFF)

# A directory to find Google Test sources.
if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt")
set(gtest_dir gtest)
else()
set(gtest_dir ../googletest)
endif()


参考：
https://cmake.org/Wiki/CMake_Cross_Compiling