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

[Sebastian Nowozin]

Hello Andreas,

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.

Meanwhile I have compiled COIN Osi on a real x86_64 system and can
link against that binaries, but in the long term it would be nice to
know.

Thanks again,
Sebastian

On Thu, Feb 28, 2008 at 9:13 PM, Andreas Waechter
<andreasw at watson.ibm.com> wrote:

>  I had a look at this.  Are you sure that you need to use the --target
>  option?  It is my impression that --host is meant for cross compilation.
>  I believe that the run test in configure are switched off if you use
>  --host.
>
>  I can't try this right now since I don't have access to a system with
>  a cross compiler.  But at some point I had successfully compiled Ipopt (so
>  that it could run on my Ipod...)
>
>  Regards,
>
>  Andreas
>
>
>
>  On Wed, 27 Feb 2008, Andreas Waechter wrote:
>
>  > Hi Sebastian,
>  >
>  > This is a good observation.  It might be possible to fix it easily.  Do
>  > you know about autoconf, have you used it?  Is it true that all we have to
>  > do is to use the AC_CANONICAL_TARGET macro?
>  >
>  > Thanks,
>  >
>  > Andreas
>  >
>  > On Wed, 20 Feb 2008, Sebastian Nowozin wrote:
>  >
>  >>
>  >> Hello everybody,
>  >>
>  >> is there a standard way to cross compile COIN projects?
>  >>
>  >> I have an Ubuntu 7.10 running a 32 bit kernel and want to produce 64 bit
>  >> libraries of COIN Osi in order to statically link my program against.  I
>  >> have done this before for some other libraries using gcc's -m64 option.
>  >>
>  >>   The usual configure --build/--host/--target option is not working
>  >> because --target is missing from the configure script in COIN Osi.
>  >> Also, I tried using ADDCXXFLAGS="-m64", but the configure script
>  >> compiles and tries to run some test program which fails because the
>  >> actual host is 32 bit.
>  >>
>  >> Using cross-compilation to produce static binaries would ease the build
>  >> process (for programs to be run on a 64bit cluster system) considerably,
>  >> as the target systems are rather old and do not have modern compilers
>  >> installed.
>  >>
>  >> Sebastian
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>  >>
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