Re: linking with 32-bit libraries on 64-bit systems

["Fernando Apesteguía" <fernando apesteguia gmail com>]

On 6/27/07, Fernando Apesteguía <fernando apesteguia gmail com> wrote:
> On 6/27/07, Mohammed El-Afifi <mohammed_elafifi yahoo com> wrote:
> >
> >
> > I'm using fedora 6, the 64-bit edition. I'm trying to build a program that
> > links with a 32-bit library. I'm using a command similar to the following:
> > g++ -o main /usr/lib/libvorbisfile.so main.cpp
> > I'm getting an error that tells me that symbols can't read from the library
> > file because it has a wrong format.
> > However, when I try to build the program with the 64-bit version of the
> > library using a command like the following:
> > g++ -o main /usr/lib64/libvorbisfile.so main.cpp
> > the program is built successfully.
> > I tried to build this same program on a system running fedora 6, the 32-bit
> > edition, using the same command:
> > g++ -o main /usr/lib/libvorbisfile.so main.cpp
> > and it was built successfully.
> > It seems that the gcc on fedora 64-bit refuses to link programs with 32-bit
> > libraries. Is there a method to force the gcc to link programs to 32-bit
> > libraries on a system running the 64-bit edition of fedora 6?
>
> I don't remember it exactly, but I think you have to use -m32 to tell
> gcc that you are going to create a 32-bit executable.
>
> Cheers

OK, Hi again

Try with this to link. I don't know why, but in a single step gcc
seemed to not bypass the good options to ld.

gcc -o program -m32 -march=i386 -L/usr/lib -L/lib my.o


HTH
> > Appreciating your feedback.
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