[CMake] Antwort: Re: Re: Antwort: Antwort: Re:Antwort: Re: Toolchain with non-gcc argument format

[Anders Lindgren]

Hi!

One solution is to write a wrapper script in your favourite scripting
language (Ruby, Python etc) that pretend that it's a compiler. It could
recognise the -I option and start the RX compiler with the --include
option. It would not hurt to make it recognise other standard flags like
"-o" and "-c" in case the RX compiler doesn't support them either.

    -- Anders

On Wed, Nov 22, 2017 at 10:33 AM, <oliver.zabel at egoproducts.com> wrote:

> 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.noulard at gmail.com>
> An:        oliver.zabel at egoproducts.com
> Kopie:        CMake Mailinglist <cmake at 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.zabel at egoproducts.com*
> <oliver.zabel at 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*
> <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*
> <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*
> <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.zabel at egoproducts.com*
> <oliver.zabel at 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*
> <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*
> <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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