cross compiling

[Alexander Vasiliev]

---------- Forwarded message ----------
From: Alexander Vasiliev <alexvasiljev at gmail.com>
Date: 21.12.2007 14:18
Subject: Re: cross compiling
To: Stepan Kasal <skasal at redhat.com>


Hello, Stepan.

I was building pkg-config-0.22.

So if i specify CC and host, it should work, if there wouldn't be
problems with executing the just-built test programs.

Have a nice holidays

2007/12/20, Stepan Kasal <skasal at redhat.com>:
> Hello Alexander.
>
> On Thu, Dec 20, 2007 at 09:16:34PM +0300, Alexander Vasiliev wrote:
> > checking for extra flags to get ANSI library prototypes... configure:
> > error: cannot run test program while cross compiling
> > See `config.log' for more details.
> > configure: error: ./configure failed for glib-1.2.8"
>
> This seems to be a bug in pkg-config/glib-1.2.8/configure.in .
> I'll look at the details in due time and report here.
> Could you plese tell me which version of pkg-config you were
> building?
>
> Generally speaking:
> This message indicates that configure.ac (or configure.in) called
> (directly or indirectly) the macro AC_RUN_IFELSE (or AC_TRY_RUN)
> without the fourth parameter, which defines the result for the cross
> compile case, which, naturally, does not allow configure to execute
> the just-built test program.  This is described in:
> http://www.gnu.org/software/autoconf/manual/html_node/Runtime.html
>
> > Dear group.
> > --host=arm  --exec-prefix=/home/windhunter/dv/gtk/davinci/pkg
> > CC=/opt/mv_pro_4.0/montavista/pro/devkit/arm/v5t_le/bin/arm_v5t_le-gcc"
> ...
> > I especialy confused about what i found in the congfig.log:
> >  "WARNING: In the future, Autoconf will not detect cross-tools
> > whose name does not start with the host triplet."
> >
> > Does it mean, that i cannot use tools with prefix arm_v5t_le- for
> > architecture arm?
>
> Definitely not.  In your case, you specify CC explicitely on the
> command line, disabling the automatic detection; that functionality
> will stay intact.
>
> If you had not specified CC on cthe command line, the configure
> script would look for "arm-gcc arm-cc gcc cc". (The list might be
> longe but that does not matter.)  With future releases of Autoconf,
> only the first half of the list will be used.
> That should not cause problems; having a _cross_ compiler without any
> prefix is not a good practice anyway.
> Hope this clears your worries.
>
> Have a nice Xmass,
>         Stepan Kasal
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