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Posted to dev@httpd.apache.org by Enrico Weigelt <we...@metux.de> on 2004/12/14 06:39:25 UTC
yet another autoconf torture
hi folks,
when trying to crosscompile apache, it breaks in libapr configure:
> cannot check setpgrp when crosscompiling
So crosscompiling seems to be impossible. I've tested it on
2.0.49 up to 2.0.52.
cu
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Enrico Weigelt == metux IT service
phone: +49 36207 519931 www: http://www.metux.de/
fax: +49 36207 519932 email: contact@metux.de
cellphone: +49 174 7066481
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Re: yet another autoconf torture
Posted by Enrico Weigelt <we...@metux.de>.
* Paul Querna <ch...@force-elite.com> wrote:
<snip>
> >So crosscompiling seems to be impossible. I've tested it on
> >2.0.49 up to 2.0.52.
>
> uhm. cross compiling from what to what?
i686-pc-gnu-linux -> i686-pc-gnu-linux, but with sysroot and
different libc versions.
cu
--
---------------------------------------------------------------------
Enrico Weigelt == metux IT service
phone: +49 36207 519931 www: http://www.metux.de/
fax: +49 36207 519932 email: contact@metux.de
cellphone: +49 174 7066481
---------------------------------------------------------------------
-- DSL ab 0 Euro. -- statische IP -- UUCP -- Hosting -- Webshops --
---------------------------------------------------------------------
Re: yet another autoconf torture
Posted by Paul Querna <ch...@force-elite.com>.
Enrico Weigelt wrote:
> hi folks,
>
>
> when trying to crosscompile apache, it breaks in libapr configure:
>
>
>>cannot check setpgrp when crosscompiling
>
>
> So crosscompiling seems to be impossible. I've tested it on
> 2.0.49 up to 2.0.52.
uhm. cross compiling from what to what?
Re: yet another autoconf torture
Posted by Enrico Weigelt <we...@metux.de>.
* Joe Orton <jo...@redhat.com> wrote:
<snip>
> It is possible to support cross compilation with autoconf-based build
> systems. configure supports this by use of cache variables; standard
> practice is to build up a "config.site" file with the correct test
> results for the target (e.g. "ac_cv_func_setpgrp_void=yes"), and set
> CONFIG_SITE to point at that file. More work may be needed on the
> configure scripts to use AC_CACHE_CHECK appropriately.
Ah, do I have to patch anything for that or does it run out of the box ?
I had exactly the same problem with openssl. I fixed it by simply
pulling off several checks (ie the file-exist-checks simply refused
to work in crosscompile mode) and recreated configure. The tests I
removed were meaningless for my platforms nevertheless.
But the problem is another point: autoconf is not really made for
crosscompiling. the support for different tool commands and the so called
"crosscompile support" (simply disable a bunch of checks or refuse to
work when it doesnt know what to do now) is just an ugly hack, neither
are sysroot builds supported in any way.
To get a really reliable solution for that, we need an new, well designed
universal toolchain frontend. this of course could also be shipped with
apache for a while (-> "vendor branch" ... grrmpf).
> But the Makefiles still won't work since they have no separate of host
> and target $CC etc, yet need to build and run executables on the host
> system in several places. So there is definitely more work needed
> there.
Right.
I'm passing my crosstoolchain commands (CC,LD, ...). But this only
works as long as the package doesnt bring its own host-side-tools.
We need at least an *clear* distinction between host und and target
compilation.
These are all questions for the unitool, which I already announced
here. For those who dont remember:
Wiki: http://nibiru.borg.metux.de:7000/wiki/index.php/Universal_Toolchain
Maillist: unitool-dev@metux.de, subscribe via majordomo@metux.de
cu
--
---------------------------------------------------------------------
Enrico Weigelt == metux IT service
phone: +49 36207 519931 www: http://www.metux.de/
fax: +49 36207 519932 email: contact@metux.de
cellphone: +49 174 7066481
---------------------------------------------------------------------
-- DSL ab 0 Euro. -- statische IP -- UUCP -- Hosting -- Webshops --
---------------------------------------------------------------------
Re: yet another autoconf torture
Posted by Joe Orton <jo...@redhat.com>.
On Tue, Dec 14, 2004 at 06:39:25AM +0100, Enrico Weigelt wrote:
>
> hi folks,
>
>
> when trying to crosscompile apache, it breaks in libapr configure:
>
> > cannot check setpgrp when crosscompiling
>
> So crosscompiling seems to be impossible. I've tested it on
> 2.0.49 up to 2.0.52.
It is possible to support cross compilation with autoconf-based build
systems. configure supports this by use of cache variables; standard
practice is to build up a "config.site" file with the correct test
results for the target (e.g. "ac_cv_func_setpgrp_void=yes"), and set
CONFIG_SITE to point at that file. More work may be needed on the
configure scripts to use AC_CACHE_CHECK appropriately.
But the Makefiles still won't work since they have no separate of host
and target $CC etc, yet need to build and run executables on the host
system in several places. So there is definitely more work needed
there.
Regards,
joe