[Coin-discuss] Cross-compiling COIN projects (Osi)

[Andreas Waechter]

Hi Sebastian,

I think you have to give a proper value to the option --host, such as

--host="arm-linux-gcc"

or something like that.

Maybe that works?

Thanks

Andreas

On Fri, 29 Feb 2008, Sebastian Nowozin wrote:

>
> Hello Andreas,
>
> Sebastian Nowozin wrote:
>
>> thanks for your answer, I will try to use
>> 
>> ADDCXXFLAGS=-m64 ./configure --host ""
>> 
>> tomorrow.  The problem with with x86_64 target is that the same
>> compiler binary is used, whereas for normal cross compilation the
>> compiler binary has a prefix, and is named such as "arm-linux-gcc".
>> Maybe somebody here figured already how to cross compile.
>
> Does not work, I used the following line to try to compile Osi 0.97.1 on a 
> x86 32bit Ubuntu host:
>
> COIN_SKIP_PROJECTS="DyLP" CXXFLAGS="-m64" CFLAGS="-m64" FFLAGS="-m64" 
> ADD_CFLAGS="-m64" ADD_CXXFLAGS="-m64" ADD_FFLAGS="-m64" ./configure --host "" 
> --prefix=/tmp/coin-osi-0.97.1-amd64 --without-dylp
>
> The result is an immediate (after less than 10 lines of configure output):
>
> checking whether the C compiler works... configure: error: cannot run C 
> compiled programs.
> If you meant to cross compile, use '--host'.
>
> Now, the problem is, that there is no 64 bit cross compiler, because gcc can 
> cross compile with -m64 and -m32 on all modern Linux distributions.
>
> Also, it seems that even without cross compiling, ADD_CXXFLAGS is ignored and 
> I do not see "-m64" in the calls to g++.
>
> Sebastian
>