RE: Trying to build gcc cross compiler from linux to freebsd‏

[Niccolò Ferrari]

Thank you very much!
I searched a lot for an article like that but I wasn't able to find one! And that solve the problem, however I think that recompiling all gcc also for i386 will work, but your is a better method I think.
However `file test_32' command (test_32 is binary produced with  -m32 -DCOMPAT_32BIT -L/usr/lib32 -B/usr/lib32 flags) return this:
"test_32: ELF 32-bit LSB executable, Intel 80386, version 1 (FreeBSD), dynamically linked (uses shared libs), for FreeBSD 10.1, not stripped", so I think that it will work correctly under a 32-bit freebsd10.1 system.

Thank you another time!
Niccolò F.


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> Date: Thu, 19 Mar 2015 18:34:38 +0200
> From: kai.ruottu@wippies.com
> To: niccolo.ferrari@hotmail.it; gcc-help@gcc.gnu.org
> Subject: Re: FW: Trying to build gcc cross compiler from linux to freebsd‏
>
> 19.3.2015, 3:44, Niccolò Ferrari kirjoitti:
>> Hi another time,
>> The toolchain built works fine for 64bit instruction set, but if I specify -m32 it return errors:
>> $ x86_64-freebsd10.1-gcc -m32 test.c -o test
>> /usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:
>> skipping incompatible
>> /usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/libgcc.a when
>> searching for -lgcc
>> /usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:
>> skipping incompatible /usr/local/sysroot/freebsd10.1/usr/lib/libgcc.a
>> when searching for -lgcc
>> /usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:
>> skipping incompatible /usr/local/sysroot/freebsd10.1/usr/lib/libgcc.a
>> when searching for -lgcc
>> /usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:
>> cannot find -lgcc
>
> I tried this myself and saw the same thing happening. When looking at
> what was built and installed and
> at the config settings for the target, it is obvious that there isn't
> any multilib or bi-arch support in the GCC
> sources for the 'x86_64-freebsd10.1' target :(
>
> When googleing about this issue, the advice in :
> https://forums.freebsd.org/threads/dumb-32-vs-64bit-questions.22872/
> to use :
> -m32 -DCOMPAT_32BIT -L/usr/lib32 -B/usr/lib32
> with the native FreeBSD compiler seemed to help but the absolute
> addresses to the $sysroot were needed :
> -m32 -L$SYSROOT/usr/lib32 -B$SYSROOT/usr/lib32
> My try with a 32-bit "Hello World" C program succeeded after using
> these. The final link used what it found
> in the 'SYSROOT/usr/lib32' like the 'libgcc.a', 'crtbegin.o',
> 'crtend.o',... None of them produced with gcc-4.9.2
> because nothing was produced in the gcc-4.9.2 for the 32-bit case.
> Whether the linked app would work I cannot
> say much.
>
> I one wants the 32-bit arch support in gcc-4-9.2 for x86_64-freebsd10.1
> then hacking the config files a little
> is required...
>
>
>