jeffiedward wrote:
>
> Hi,
> I'm new to the GNU tool building environment.
The main gcc list is for questions about the coding design and internals of
the compiler itself; please send questions about how to *use* the compiler to
the gcc-help list. (I've changed the Cc: line, please make sure any
follow-ups go there).
> I'm trying to build cross GCC for powerpc-linux platform.
> checking whether ranlib is necessary... /tmp/ccE5O0vD.s: Assembler messages:
> /tmp/ccE5O0vD.s:7: Error: Unrecognized opcode: `pushl'
> /tmp/ccE5O0vD.s:8: Error: Unrecognized opcode: `movl'
> /tmp/ccE5O0vD.s:9: Error: Unrecognized opcode: `popl'
> /tmp/ccE5O0vD.s:10: Error: Unrecognized opcode: `ret'
Ok, what's happening here is that configure is using the x86 assembler when
it should be using the ppc cross-assembler. Here's why:
> first-stage gcc:
> ---------------
> ../configure --target=powerpc-linux-gnu --prefix=/home/tellabs/GNU/PPC
> --disable-shared --disable-threads --enable-languages=c
Here you configure your cross-compiler correctly. It runs on the host
machine (your x86-linux machine that you're building on, since you didn't
specify any explicit --host) and generates code that runs on the --target
machine - the powerpc you're trying to cross-compile for.
> when i try to compile glibc, the following configuration error occurs:
>
> ../configure CFLAGS=" -march=i686 -O2" --host=i686-pc-linux-gnu
> --target=powerpc-linux-gnu --prefix=/home/tellabs/GNU/PPC
> --with-headers=/home/tellabs/GNU/include
> --with-binutils=/home/tellabs/GNU/PPC/powerpc-linux-gnu/bin
Right, it's a bit confusing, but you'll see if you think it through: when
you go to compile the library, you are no longer compiling something that
"runs on" your x86 machine, it runs on the powerpc machine; and since it's
just a library, it doesn't generate any code for anything at all, so the
concept of "target" means nothing to it.
So when it comes to the library, that means that what /was/ the target for
the compiler and binutils now becomes the *host* for the library, and the
library has no target setting at all. So try this instead:
> ../configure CFLAGS=" -march=i686 -O2" --host=powerpc-linux-gnu
> --prefix=/home/tellabs/GNU/PPC
> --with-headers=/home/tellabs/GNU/include
> --with-binutils=/home/tellabs/GNU/PPC/powerpc-linux-gnu/bin
cheers,
DaveK
