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

[Kai Ruottu]

18.3.2015, 0:27, Kai Ruottu kirjoitti:
> 17.3.2015, 21:14, Niccolò Ferrari kirjoitti:
>> Hello,
>>   I was trying to compile a gcc cross compiler for linux x86_64 
>> (build and host) to freebsd x86_64. I tried to follow this 
>> http://marcelog.github.io/articles/articles.html
> The steps are :
>
> 1. choose a sysroot where to put the C headers and libraries for the 
> target (usually in '/usr/include' and '/usr/lib'
>     on the native target system)
>
> 2. copy them onto the sysroot, for example '$sysroot/usr/include' and 
> '$sysroot/usr/lib' on the cross host
>
> 3. configure the GNU binutils and GCC using '--with-sysroot=$sysroot' 
> to tell where the target stuff is on the
>     cross host system. Build and install them, binutils first, GCC 
> then...
>
> 4. be happy and try making a "Hello World" app for the target, 
> compiling it on the cross host...
>

I looked what the :

http://marcelog.github.io/articles/cross_freebsd_compiler_in_linux.html

told and it seems these instructions are for the "pre-sysroot" time...  
If one makes one's ow $sysroot to have
a 1-to-1 image to the target's native install scheme for the headers and 
libraries then things should be much
easier. Especially when the target is a bi-arch system with separate 
64-bit (default) and 32-bit libraries and
separate places for the shared libs (.so) and the static archives (.a). 
Which I expect the x86_64-freebsd* systems
being just like the x86_64-linux-gnu systems are...

My own "standard" place for a $sysroot is '/opt/host-$target', in your 
case the chosen $sysroot would be :

   /opt/host-x86_64-freebsd10.1

and there those possible 'lib*', 'usr/lib*', 'usr/include' etc 
directories the target system has as its C library
stuff...