Re: crossgcc for mips-redhat-linux-gnu

[Toralf Lund <toralf at procaptura dot com>]

Chris Jones wrote:

> Toralf;
>
> On Thu, Mar 18, 2004 at 01:51:19PM +0100, Toralf Lund wrote:
>  
>
> > rpmbuild --rebuild --target=mips-linux-gnu --define "_host 
> > mips-linux-gnu" -define "_build i686-pc-linux-gnu" ./x.src.rpm
> >
> > - Toralf
> >
> >    
>
> This now sets up the proper target, host and build variables on the
> configure line. Thanks, I should have known to do this, but at the same
> time defining the --target variable should set these up as you
> described, IMHO.
>  
Yes. The problem is that the default macro setup (for i686 Linux) has

%_build         %{_host}

%_host          i686-pc-linux-gnu

%_target        %{_host}


This is consistent with the way configure itself usually defaults 
variables, but doesn't seem logical in the context of --target; 
something like

%_build        i686-pc-linux-gnu

%_target       %{_build}

%_host         %{_target}


would probably be better. Or maybe rpmbuild ought to have separate 
"--host" and "--build" options...

Another question is why configure distinguises between "host" and 
"target" in the first place, since you usually need only two system type 
values even when cross compiling.

> There remains one problem. 
> I would like to avoid touching the .spec files if possible.
> Currently I still have to set the following variable inside the .spec:
>
> CFLAGS=-I/opt/crosstool/mips-redhat-linux-gnu/gcc-3.2.3-glibc-2.2.3/mips-redhat-linux-gnu/include
>
> It would be a saving grace if I could either set this last variable from
> the command line, or somehow get the environment to pick it up.
>
> Ideas?
>  
Not really. Unless  it's as simple as doing "setenv CFLAGS ..." or 
"export CFLAGS=..." before executing rpmbuild...

- Toralf

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