crossgcc for mips-redhat-linux-gnu

[Toralf Lund]

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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