Hi Eric, thanks a lot for your help! i'm going to try it on the dev mailing list.
Cheers, Oliver Von: Eric Noulard <eric.noul...@gmail.com> An: oliver.za...@egoproducts.com Kopie: CMake Mailinglist <cmake@cmake.org> Datum: 22.11.2017 09:49 Betreff: Re: Re: [CMake] Antwort: Antwort: Re:Antwort: Re: Toolchain with non-gcc argument format Hi Olivier, Putting the list back. You may try developer list as well. 2017-11-22 9:02 GMT+01:00 <oliver.za...@egoproducts.com>: Hi, Is there really no way to override this var with a toolchain file? that seems somehow strange to me, since CMAKE is so configurable that i can't change "-I" to "-include=" .... what do i have to do? I'm sorry I'm a little short in time to investigate that with you at the moment and I hope some other people may step in. The var "CMAKE_INCLUDE_FLAG_C" is NOT a toolchain file variable and it won't end-up in the cache file. AFAIK It is **only** used in compiler detection, e.g. at early stage of project configuration when processing project(...) or enable_language(..) Adding new toolchain is not as flexible as adding a new **kind** of compiler. The knobs accessing for writing a toolchain are described here: https://cmake.org/cmake/help/v3.10/manual/cmake-toolchains.7.html There you can see that: "Languages are enabled by the project() command. Language-specific built-in variables, such as CMAKE_CXX_COMPILER, CMAKE_CXX_COMPILER_ID etc are set by invoking the project() command." Unless I'm wrong the toolchain mechanism does not include the capability to change "-I" to "-include". Now adding a new "kind" of compiler, a.k.a. compiler ID, enables you to specify that include directive flag is " -include" (and many other things as well) Adding a new compiler ID requires to add files in <CMakePrefix>/Modules/Compiler (see https://github.com/Kitware/CMake/tree/master/Modules/Compiler) as you can see it requires at least a couple of file to find a compiler and one file per supported language (C, CXX, etc...) in the C or CXX specific file you may use CMAKE_INCLUDE_FLAG_C and other variables: see e.g.: https://github.com/Kitware/CMake/blob/master/Modules/Compiler/TI-C.cmake I did never add a new kind of compiler so I hope people with more knowlegde than me in this area will explain that part better than me. Eric 2017-11-16 9:44 GMT+01:00 <oliver.za...@egoproducts.com>: I did not find the CMAKE_INCLUDE_FLAG_C in the CMake cache - is it possible that this is somehow ignored? This variable is used by CMake **builtin compiler** discovery and configuration. The file are are put in "Modules/Compiler" there is one per-langage and per-compiler ID: https://cmake.org/cmake/help/v3.7/variable/CMAKE_LANG_COMPILER_ID.html I don't know the exact processing order of this set of files. Toolchain files: https://cmake.org/cmake/help/v3.7/manual/cmake-toolchains.7.html does not use or contain such variables. -- Eric -- Eric
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