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Re: Initial cross-compilation support
From: |
Ludovic Courtès |
Subject: |
Re: Initial cross-compilation support |
Date: |
Fri, 29 Mar 2013 22:39:29 +0100 |
User-agent: |
Gnus/5.130005 (Ma Gnus v0.5) Emacs/24.3 (gnu/linux) |
Nikita Karetnikov <address@hidden> skribis:
>> The absolute file name appeared in your previous message:
>
>>
>> /nix/store/g9js73bwv1fl92h1nnf50vf1619irnxf-gcc-cross-sans-libc-mips64el-linux-gnu-4.7.2/lib/gcc/mips64el-linux-gnu/4.7.2/libgcc.a
>
> # objdump -a
> /nix/store/g9js73bwv1fl92h1nnf50vf1619irnxf-gcc-cross-sans-libc-mips64el-linux-gnu-4.7.2/lib/gcc/mips64el-linux-gnu/4.7.2/libgcc.a
> | grep 'file format' | head
> _m16addsf3.o: file format elf64-little
That’s n64, good.
>> After a bit of research, I found ports/sysdeps/mips/preconfigure (in
>> libc). Apparently, it interprets the OS part of the target triplet to
>> determine the ABI. So, if you specify --target=mips64el-linux-gnuabi64,
>> it should automatically build glibc for n64.
>
> I changed it like this:
>
> diff --git a/gnu/packages/cross-base.scm b/gnu/packages/cross-base.scm
> index 69dc9f5..8cd93e9 100644
> --- a/gnu/packages/cross-base.scm
> +++ b/gnu/packages/cross-base.scm
> @@ -87,6 +87,10 @@ GCC that does not target a libc; otherwise, target that
> libc."
> "--disable-libssp"
> "--disable-libquadmath"
> "--disable-decimal-float" ; would need
> libc
> +
> + ;; MIPS64
> + "--with-arch=mips64"
> + "--with-abi=64"
> )))
>
> ,(if libc
> @@ -231,7 +235,8 @@ XBINUTILS and the cross tool chain."
> ;;;
>
> (define-public xgcc-mips64el
> - (let ((triplet "mips64el-linux-gnu"))
> + ;; (let ((triplet "mips64el-linux-gnu"))
> + (let ((triplet "mips64el-linux-gnuabi64"))
> (cross-gcc triplet
> (cross-binutils triplet)
> (cross-libc triplet))))
Looks good.
>> So, if you specify --target=mips64el-linux-gnuabi64,
>> it should automatically build glibc for n64.
>
> But 'guix build' doesn't have '--target'. How can I specify it?
It’s a ‘configure’ flag; it’s passed automatically when libc is
cross-built.
> So I used the following command:
>
> # ./pre-inst-env guix build -K gcc-cross-mips64el-linux-gnuabi64
>
> [...]
>
> mips64el-linux-gnuabi64-gcc -mabi=64 -nostdlib -nostartfiles -r -o
> /tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/libc_pic.os
> \
> -Wl,-d -Wl,--whole-archive
> /tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/libc_pic.a
> -o
> /tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/libc_pic.os
> mips64el-linux-gnuabi64-gcc -mabi=64 -nostdlib -nostartfiles -r -o
> /tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/elf/librtld.map.o
> '-Wl,-('
> /tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/elf/dl-allobjs.os
>
> /tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/libc_pic.a
> -lgcc '-Wl,-)'
> -Wl,-Map,/tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/elf/librtld.mapT
> /tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/libc_pic.a:
> could not read symbols: Archive has no index; run ranlib to add one
> collect2: error: ld returned 1 exit status
> make[2]: ***
> [/tmp/nix-build-glibc-cross-mips64el-linux-gnuabi64-2.17.drv-1/build/elf/librtld.map]
> Error 1
Can you run ‘file’ on the above libc_pic.a, or the files it contains?
Could you paste (from the log) the command that built it?
I think the things you mention in config.log are harmless.
(BTW, note that we’re making actual progress! :-))
HTH,
Ludo’.
- Re: Initial cross-compilation support, Andreas Enge, 2013/03/03
- Re: Initial cross-compilation support, Ludovic Courtès, 2013/03/03
- Re: Initial cross-compilation support, Nikita Karetnikov, 2013/03/28
- Re: Initial cross-compilation support, Ludovic Courtès, 2013/03/28
- Re: Initial cross-compilation support, Nikita Karetnikov, 2013/03/28
- Re: Initial cross-compilation support, Ludovic Courtès, 2013/03/28
- Re: Initial cross-compilation support, Nikita Karetnikov, 2013/03/28
- Re: Initial cross-compilation support, Ludovic Courtès, 2013/03/29
- Re: Initial cross-compilation support, Nikita Karetnikov, 2013/03/29
- Re: Initial cross-compilation support,
Ludovic Courtès <=
- Re: Initial cross-compilation support, Nikita Karetnikov, 2013/03/29
Re: Initial cross-compilation support, Nikita Karetnikov, 2013/03/03