[Python-Dev] Solaris family and 64 bits compiling

[Jesus Cea]

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On 22/11/10 23:05, "Martin v. Löwis" wrote:
>> PS: Martin, is there any reason to restrict the solaris 10 buildslaves
>> to 32 bits, beside the said problems?.
> 
> I don't see that as a restriction. I have to make a choice, and there
> are sooo many choices to make:
> - gcc vs. SunPRO
> - 32-bit vs. 64-bit
> - GNU make vs. /usr/ccs/bin/make
> 
> I picked the combination which was most easy to setup, and is therefore
> likely to be used by most users (except for those who think 64-bit
> is somehow "better" than 32-bit, when it is actually the other way
> 'round - IMO).

Do not think this is a personal attack. Not at all. I am deploying 32
and 64 bits buildslaves (in the same machine) and feeling the pain. You
are far more experiences than me with buildbots and python. I want to
know if I am missing something.

> As for configuration, I personally prefer that setting CC indicates
> what type of build you want. Set CC to "gcc -m64" to indicate a
> 64-build. Ideally, you will *not* have to adjust library paths, since
> the other compiler will know on its own where to search things.

The problem is not with system library paths. Compilers overcome that.
The problem is with things like "/usr/local/lib" and hardcoded library
paths in Python.

For example, checking
<http://www.python.org/dev/buildbot/all/builders/AMD64%20OpenIndiana%203.x/builds/8/steps/test/logs/stdio>:

"""
gcc -shared -m64
build/temp.solaris-2.11-i86pc-3.2-pydebug/export/home/buildbot/64bits/3.x.cea-indiana-amd64/build/Modules/readline.o
- -L/usr/lib/termcap -L/usr/local/lib -lreadline -lncursesw -o
build/lib.solaris-2.11-i86pc-3.2-pydebug/readline.so
ld: fatal: file /usr/local/lib/libncursesw.so: wrong ELF class: ELFCLASS32
ld: fatal: file processing errors. No output written to
build/lib.solaris-2.11-i86pc-3.2-pydebug/readline.so
collect2: ld returned 1 exit status
"""

The "-L/usr/local/lib" should be "-L/usr/local/lib/64". An example of many.

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