Re: [Qemu-devel] [RFC PATCH] Allow building without graphics support

[Scott Wood <scottwood@freescale.com>]

On 12/13/2012 12:31:14 AM, Stefan Weil wrote:
> Am 13.12.2012 01:48, schrieb Scott Wood:
>> It doesn't seem to like my --cross-prefix being a full path rather  
>> than being a recognized target pattern:
>> 
>> checking host system type... Invalid configuration  
>> `/home/scott/fsl/tc/gcc-4.5.55-eglibc-2.11.55/powerpc-linux-gnu/bin/powerpc-linux-gnu':  
>> machine  
>> `/home/scott/fsl/tc/gcc-4.5.55-eglibc-2.11.55/powerpc-linux-gnu/bin/powerpc'  
>> not recognized
>> configure: error: /bin/bash  
>> /home/scott/fsl/git/qemu/pixman/config.sub  
>> /home/scott/fsl/tc/gcc-4.5.55-eglibc-2.11.55/powerpc-linux-gnu/bin/powerpc-linux-gnu  
>> failed
>> make: *** [pixman/Makefile] Error 1
>> 
>> When I forced --host=powerpc-linux into the pixman configure command  
>> in QEMU's generated Makefile, it got past that, but it built  
>> everything with the native compiler:
>> 
>> checking build system type... x86_64-unknown-linux-gnu
>> checking host system type... powerpc-unknown-linux-gnu
>> checking for powerpc-linux-gcc... no
>> checking for gcc... gcc
>> 
>> Looking a bit more closely, it seems that it's the QEMU rather than  
>> pixman's autoconf that is making the bad assumption about the format  
>> of --cross-prefix (I really wasn't up for wading in autoconf).   
>> Running basename on cross-prefix and explicitly supplying CC and  
>> such to pixman would help, though there still should be a way to  
>> pass in an explicit host tuple if you have an unusually-named  
>> toolchain.
>> 
>> -Scott
> 
> Indeed, --cross-prefixdoes not support absolute path names.
> 
> I assume that the executables in
> /home/scott/fsl/tc/gcc-4.5.55-eglibc-2.11.55/powerpc-linux-gnu/binare  
> without prefix
> (gcc, ld, ...).

No, they are with prefix, just not in $PATH.  I have more than one  
"powerpc-linux-gnu" toolchain and I don't want to mess with my $PATH  
constantly to choose between them.

> Then there must also be the same executables with prefix
> (powerpc-linux-gnu-gcc, powerpc-linux-gnu-ld, ...). These must be  
> somewhere in PATH.

No.  This was never a requirement before -- why now?

> Use --cross-prefix=powerpc-linux-gnu-(note the "-" at the end).
> Then pixman would be configured with --host=powerpc-linux-gnu and  
> should find
> the compiler. It won't find the compiler powerpc-linux-gcc when its  
> real name is
> powerpc-linux-gnu-gcc.

No, it's real name is  
/home/scott/fsl/tc/gcc-4.5.55-eglibc-2.11.55/powerpc-linux-gnu/bin/powerpc-linux-gnu-gcc

-Scott