Re: [Boost-build] How to make clang toolset use custom archiver and ranlib from user-config.jam?

Subject: Re: [Boost-build] How to make clang toolset use custom archiver and ranlib from user-config.jam?
From: Rene Rivera (grafikrobot_at_[hidden])
Date: 2017-04-04 03:56:53

Somehow I missed this email (too many email, too little brain time)..

On Wed, Mar 22, 2017 at 8:05 AM, Frédéric Bron via Boost-build <
boost-build_at_[hidden]> wrote:

> Hi,
>
> ar and ranlib cannot be customized for clang toolset as they are for
> gcc which makes it difficult to use in a cross-compilation
> environment. When cross-compiling from linux to windows, I can have in
> my user-config.jam:
>
> using gcc : : i686-w64-mingw32-g++-6.3.0 :
> <archiver>i686-w64-mingw32-ar <ranlib>i686-w64-mingw32-ranlib ;
>
> With the clang toolset, this does not work, archiver and ranlib
> options are ignored.
>
> This is why: here is what we find in tools/build/src/tools/clang-
> darwin.jam
>
> # Default value. Mostly for the sake of clang-linux
> # that inherits from gcc, but does not has the same
> # logic to set the .AR variable. We can put the same
> # logic in clang-linux, but that's hardly worth the trouble
> # as on Linux, 'ar' is always available.
> .AR = ar ;
>
> ...
>
> actions piecemeal archive
> {
>   "$(.AR)" $(AROPTIONS) rc "$(<)" "$(>)"
>   "ranlib" -cs "$(<)"
> }
>
> Unfortunately, I do not understand the language of jam files so the
> only thing I can do for the time being is to manually edit the file
> and replace ar and ranlib by their cross-compiler counterparts but I
> am not able to change it so that the archiver and ranlib option can be
> used.
>
> Could somebody do that or give hints on how I shoud do it?
>

Only hint is to look at how gcc.jam does it and copy the behavior to
clang-darwin.. Like the comment insinuates.

<https://github.com/boostorg/build/blob/develop/src/tools/gcc.jam#L235>
<https://github.com/boostorg/build/blob/develop/src/tools/gcc.jam#L247>

Or perhaps comment out the default value line. Maybe that will make the
target value be used. Sorry I can't be more help.. Would need to debug the
jam code to give a detailed answer. And, well, short on time :-(

-- 
-- Rene Rivera
-- Grafik - Don't Assume Anything
-- Robot Dreams - http://robot-dreams.net
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