[cfe-commits] [PATCH] [Driver] Make default GCC install prefix and sysroot relocatable

Kito Cheng kito at 0xlab.org
Tue Dec 11 10:43:17 PST 2012

On Wed, Dec 12, 2012 at 2:33 AM, Rafael EspĂ­ndola
<rafael.espindola at gmail.com> wrote:
>>> Sorry, not sure I follow. Why doesn't:
>>> ../gcc/configure --prefix=/toolchain/install/dir --host=..
>>> --target=... --build=...
>>> ...
>>> ../llvm/configure --prefix=/toolchain/install/dir
>>> produce a relocatable build like you want?
>> This way I've tried, it's work only the gcc toolchain part (and not
>> work if configure with --with-gcc-toolchain),
>> but the sysroot part is not work.
>> in our build the configure as follow
>>  ../llvm/configure --target=arm-none-linux-gnueabi
>> --prefix=/home/kito/arm-none-linux-gnueabi
>> --with-default-sysroot=/home/kito/arm-none-linux-gnueabi/arm-none-linux-gnueabi/libc/
>> --enable-targets=arm
>> and the prefix folder contain a pre-build toolchain which is download
>> from codesourcery.
> Have you debugged why it doesn't work? I think this should be finding
> the correct tools (assemblers, linkers, etc). Chandler, you guys use a
> similar setup, no?

Yes, the tools is correct but sysroot since it's search by absolute path.

>>> what about something like
>>> --with-gcc-toolchain='$prefix/../relative/gcc/dir'? $prefix would then
>>> be replaced at runtime with where clang is installed. Without $prefix
>>> an absolute path is still assumed.
>> I don't like it but acceptable :|
>> Would you have interest merge it with the $prefix version?
>> The sysroot relocatable is important for us since we are building a
>> cross-compilation toolchain distribution with both gcc and clang.
> Sorry, what do you mean by merge?
Oh, I mean accept the patch.

> In any case, we should first find out why the above is not working, as it looks like your setup should work out of the box.


> Cheers,
> Rafael

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