Dear all, I am working on a project where on certain platforms, namely, on a BG/Q or Cray, we have to cross-compile the code, but still, there are parts of the code that should only be compiled for the front end, login nodes.
Typically, we have a toolchain file, which among other things sets: - CMAKE_CXX_COMPILER - CMAKE_C_COMPILER - CMAKE_FORTRAN_COMPILER to the respective cross-compilers available on the target platform. This compiles everything for the back-end. The obvious way to compile front-end tools is to create another directory, e.g., "front-end-build" and run cmake therein to re-configure and build with a front-end compiler. However, since only a relatively small subset of the files needs to be compiled for the front-end, it is desirable to do this within the same build, which leads to my question: Is it possible to tell CMake to build certain files with a different compiler? I know there is a way to set file properties to control the compiler flags of certain files. Is there a "blessed" approach to control the compiler for certain files and/or directories (and avoid things like set(CMAKE_CXX_COMPILER...) within a CMakeLists file)? Thank you very much for all your help. Best, George
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