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Re: [patch] Enable plugin tests only when the build and the host systems are the same


On Wed, May 6, 2009 at 5:19 PM, Janis Johnson <janis187@us.ibm.com> wrote:
> On Wed, 2009-05-06 at 17:01 -0700, Le-Chun Wu wrote:
>> On Wed, May 6, 2009 at 4:12 PM, Joseph S. Myers <joseph@codesourcery.com> wrote:
>> > On Wed, 6 May 2009, Le-Chun Wu wrote:
>> >
>> >> +# The plugin testcases currently only work when
>> >> +# ? 1. the build tree is available,
>> >> +# ? 2. the host supports plugins,
>> >> +# ? 3. the build system and the host system are the same (because we use
>> >> +# ? ? ?HOSTCC to build plugins in the tests while gcc was built with the build
>> >> +# ? ? ?CC).
>> >
>> > This is confused. ?GCC was built with the host compiler, not the build
>> > compiler. ?It's always a compiler running on the host, built with the host
>> > compiler, that is being tested as it generates code for the target.
>> >
>>
>> Joseph,
>>
>> Thanks for the explanation. I think I was indeed (and still am) confused. :-)
>>
>> So in a canadian cross compilation, when I do a "make check" in the
>> build tree on the build system, I would have thought the GCC being
>> tested was built with the build compiler, not the host compiler. Is it
>> right? (But even in that case, HOSTCC, which is set to the build
>> compiler, is also the one that's used to build GCC, so the new check
>> that I added in this patch is not necessary.) I think the only case
>> where this patch makes sense is when running "make check" on the host
>> system while the build tree was created on the build system. In that
>> case, GCC was built with the build compiler and HOSTCC is set to the
>> host compiler, and this patch will prevent the plugin tests from being
>> executed. But will this case ever happen? (i.e. Is it even allowed to
>> run "make check" on the host with a GCC built on the build system?) Or
>> maybe I am totally clueless. :-)
>
> I'm also confused, particularly since I only do native builds, and
> sincerely hope that those of you with experience testing various kinds
> of cross builds can figure this out.
>

It is only a problem for canadian cross compilation. But I don't know
if "make check" works for canadian cross compilation at all.


-- 
H.J.


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