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On 2010-09-27, meino.cramer@×××.de <meino.cramer@×××.de> wrote: |
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> For my microcontroller board (ATMEL AT81RM920, linux based) |
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Do you mean AT91RM9200? |
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> I want to crosscompile kernels and applications on my 64bit Gentoo |
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> linux. |
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That's easy enough. |
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> The source of a gcc (prepared on a 32bit system I fear) for |
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> the purpose of crosscompiling from a 32bit system-- target is the |
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> above mentioned processor -- is available. |
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> |
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> Is it possible to compile this gcc as a 32bit-application on my 64bit |
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> system to ensure the same behaviour as it would if to was built on a |
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> "original 32bit Gentoo Linux"? |
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You want to compile gcc on an AMD64 machine and end up with a |
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cross-compiler that runs as an IA32 app and generates code for an ARM9 |
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target? |
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That's called a "Canadian Cross", and is rather tricky, since it |
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involves three different architectures: building a compiler on |
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architecture A (AMD64) to be run on architecture B (IA32) and generate |
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code for architecture C (ARM9). |
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Can you explain why you want that rather than a normal cross compiler? |
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IOW, why do you want to build a gcc cross compiler that runs as a |
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32-bit application? It's _way_ simpler to build a "normal" cross |
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compiler: building a compiler one architecture (AMD64) to be run on |
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that same architecture (AMD64) and generate code for a second |
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architecture (ARM9). |
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> (And in this context: The audio application "chuck" is only as 32bit |
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> application available currently. How is it possible to compile this |
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> on a 64bit system?) |
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You use a compiler that generates code for a the desired 32-bit |
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architecture. The "width" of the host is immaterial. |
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The easiest way to build such a compiler is using crosstool-ng |
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http://ymorin.is-a-geek.org/projects/crosstool |
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Crosstool-NG does have some support for doing a Canadian-cross, but I |
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don't see why you would want to do that. |
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-- |
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Grant Edwards grant.b.edwards Yow! Gibble, Gobble, we |
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at ACCEPT YOU ... |
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gmail.com |
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