Re: [RFC] [PATCH 0/9] Initial cross-compilation support

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2018-06-14 14:04, Claudius Heine wrote:
> Hi,
> 
> On Wed, 2018-06-13 at 15:07 +0200, Alexander Smirnov wrote:
>> Hi all,
>>
>> this series introduces basic cross-compilation support for Isar. The
>> implementation
>> is based around new entity - buildchroot-cross, which is quite
>> similar to original
>> buildchroot, but has host architecture.
> 
> Here is a crazy idea from me and Henning:
> Have you tried just installing an amd64-arm cross toolchain into the
> existing arm buildchroot, then switch to it from the 'native' toolchain
> using a combination of PATH variable entries, symlinks and/or wrapper
> scripts and let binfmt deal with calling the amd64 binaries of the
> toolchain in the arm chroot environment?
> 
> This way the arm system would think that you are compiling nativly
> while in fact you are using a cross compiler that is not emulated.
> 
> Would that work?

I just heard some story from SUSE folks doing something probably similar
in the past, but they had to patch binfmt to inject the native tools
into the chroot.

How would you ensure in your proposal that the native compiler finds its
libraries?

Jan

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