With CMake, you can control compilation and link flags with the following environment variables:
* CC: specify C compiler * CFLAGS: C compiler flags * CXX: specify C++ compiler * CXXFLAGS: C++ compiler flags * LDFLAGS: linker flags And to finish you can overload make command for generation using CMAKE_COMMAND option of ExternalProject_Add: CMAKE_CMMAND “${CMAKE_COMMAND}” -E env CXX=${CMAKE_CXX_COMPILER} LDFLAGS=“…” “${CMAKE_COMMAND}” From: CMake <cmake-boun...@cmake.org<mailto:cmake-boun...@cmake.org>> on behalf of Cedric Doucet <cedric.dou...@inria.fr<mailto:cedric.dou...@inria.fr>> Date: Thursday 10 December 2015 at 18:21 To: "cmake@cmake.org<mailto:cmake@cmake.org>" <cmake@cmake.org<mailto:cmake@cmake.org>> Subject: [CMake] ExternalProject_Add and inheritance Hello, I use the ExternalProject_Add command to manage third-party libraries. In the same time, I need to overcome some compatibility problems between GCC 4 and GCC 5 (strings are not defined in the same way in the STL). The solution I use is the one given here: http://stackoverflow.com/questions/33500337/how-to-handle-dual-abi-in-gcc-5 It allows me to force to use the libstdc++.so given by the GCC repository given to the cmake command. The problem is that trick does not work with the ExternalProject_Add command because configuration steps of third-party libraries are autonomous. Do you know how to solve the problem? For example, if I use the ExternalProject_Add command to manage a third-library whose configuration also depends on a cmake script, how could I tell this script to use the compilers and the libstdc++.so I provided to my own cmake script? Best, Cédric
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