[clc-devel] RFC: wrapper for ccache and distcc

Johannes Winkelmann jw at tks6.net
Thu Sep 16 06:08:05 UTC 2004


Hi,

On Wed, Sep 01, 2004 at 15:23:34 +0200, Johannes Winkelmann wrote:
> Hi,
> 
> A work collegue of mine brought to my attention that building tcl fails
> when using ccache, and I realized that the error is quite simple (not to
> say stupid ;-)); ccache comes with wrappers for gcc and g++ which just
> call 'ccache gcc $*' or 'ccache g++ $*'. Unfortunately this creates a
> problem when the Makefile calls the wrapper like this:
>   ccache-gcc [...] -DTCL_WIDE_INT_TYPE=long\ long
> 
> Since the wrapper is a shell script and will call
>   ccache gcc $*
> This will break the last argument into two ("-DTCL_WIDE_INT_TYPE=long"
> and "long"). Maybe there's a way to work around that, but I wouldn't
> know about it.
> This e.g. breaks tcl, and I remember it also broke gimp < 2 (not sure
> about >= 2).
> 
> Anyway, if ccache (the application) is called as gcc (by renaming it or
> creating a symlink called 'gcc'), it works fine. The additional
> advantage of this is that even if a Makefile doesn't use the CC and CXX
> variables, this will work. 
> The problem (and reason why I didn't do it like this earlier) is that
> those symlinks must be put somewhere, and I'm not sure what the right
> place is; IMO it should be something which isn't in the path usually,
> which means that /bin shouldn't even be considered.
> 
> gentoo uses /usr/lib/bin/{gcc,cc,g++,c++}, not sure what others use. Are
> there any suggestions what might be a good path for CRUX?
I'd like to ask for a few more comments on this question, since the
symlink variant has still a higher success rate compared to the wrapper
solution.

/usr/share/gcc-wrappers/{distcc,ccache}/{gcc,g++}
/usr/lib/gcc-wrappers/{distcc,ccache}
?

Regards, Johannes
-- 
Johannes Winkelmann              mailto:jw at tks6.net
Bern, Switzerland                http://jw.tks6.net



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