[distcc] Wrapper for different GCC versions.

[Daniel Beecham]

Fergus Henderson wrote:
> On Wed, Aug 27, 2008 at 10:53 AM, Daniel Beecham <joshu at goobah.org> wrote:
>
>   
>> Fergus Henderson wrote:
>>
>>     
>>> On Tue, Aug 26, 2008 at 3:05 PM, Daniel Beecham <joshu at goobah.org> wrote:
>>>
>>>
>>>
>>>       
>>>> Hi there everyone.
>>>> First post here, so to introduce me, I'm Daniel. :-)
>>>>
>>>> I have three computers, a Gentoo hardened server, a Gentoo desktop and a
>>>> Gentoo laptop. All run core2duo, but i don't want to give the server
>>>> anything unstable, like the gcc 4.3.
>>>>
>>>> Well, anyway, i've compiled gcc 4.3 (called via /usr/bin/gcc-4.3.1), and
>>>> i
>>>> want everything compiled by the server (for the laptop/desktop) via
>>>> distcc
>>>> to be of that version. Searching, i've found (
>>>> http://lists.samba.org/archive/distcc/2006q4/003468.html) a previous
>>>> mail
>>>> by this mailing list where Patrick shows his way of doing it. Here's how
>>>> it
>>>> looks for me (thank you, Patrick):
>>>>
>>>> sh-3.2# cd /usr/lib/distcc/bin/
>>>> sh-3.2# ls -la
>>>> total 16
>>>> drwxr-xr-x 3 root   root 4096 Aug 26 20:05 .
>>>> drwxr-xr-x 3 root   root 4096 Aug 26 13:04 ..
>>>> drwxr-xr-x 2 root   root 4096 Aug 26 15:30 .backup
>>>> -rw-r--r-- 1 distcc  240    0 Aug 26 15:13 .keep_sys-devel_distcc-0
>>>> lrwxrwxrwx 1 root   root    7 Aug 26 15:28 c++ -> wrapper
>>>> lrwxrwxrwx 1 root   root    7 Aug 26 15:28 cc -> wrapper
>>>> lrwxrwxrwx 1 root   root    7 Aug 26 15:28 g++ -> wrapper
>>>> lrwxrwxrwx 1 root   root   15 Aug 26 15:30 g++-4.3.1 -> /usr/bin/distcc
>>>> lrwxrwxrwx 1 root   root    7 Aug 26 15:28 gcc -> wrapper
>>>> lrwxrwxrwx 1 root   root   15 Aug 26 15:29 gcc-4.3.1 -> /usr/bin/distcc
>>>> -rwxr-xr-x 1 root   root   60 Aug 26 15:27 wrapper
>>>> lrwxrwxrwx 1 root   root    7 Aug 26 15:30 x86_64-pc-linux-gnu-c++ ->
>>>> wrapper
>>>> lrwxrwxrwx 1 root   root    7 Aug 26 15:30 x86_64-pc-linux-gnu-g++ ->
>>>> wrapper
>>>> sh-3.2# cat wrapper
>>>> #!/bin/bash
>>>> exec /usr/lib/distcc/bin/g${0:$[-2]}-4.3.1 "$@"
>>>>
>>>> But, trying to compile, it tells me the gcc 4.3-only flag -march=core2 is
>>>> a
>>>> bad value. (as if it's using gcc 3.4.6. Am i doing something wrong?
>>>>
>>>>
>>>>         
>>> Did you add /usr/lib/distcc/bin to the start of your PATH?
>>> What's the compilation command?
>>> Which distcc version are you using?
>>> For debugging, try adding "set -x" (after the #! line) to your bash
>>> wrapper
>>> script, and set DISTCC_VERBOSE=1.
>>>
>>>
>>>
>>>       
>> Hmm, PATH on the client machine has /usr/lib/distcc/bin at first,
>>     
>
>
> Good.
>
>
>   
>> as well as the server /etc/profile,
>>     
>
>
> That shouldn't be necessary, and might be harmful.
>
>
>   
>> however, distcc echoes
>> something along the lines with "distcc 2.18.3 trace: compiler name is
>> x86_64-pc-linux-gnu-gcc, setting PATH="/usr/local/sbin:/usr....". That must
>> be the problem.
>>     
>
>
> distcc removes its own directory from the PATH, before searching for the
> compiler, to ensure that you don't end up having distcc recursively invoke
> itself.
>
> If that is what's causing the problem, it might work better if you put the
> symlinks to "wrapper" in a different directory than the symlinks to distcc.
>
> Otherwise, please attach the full output from a distcc command with
> DISTCC_VERBOSE=1.
>   

http://rafb.net/p/SSUt3b52.html
There you go. :-)