Re: Setting up a cross-compile

[David Daney <ddaney@xxxxxxxxxx>]

Dave Williss wrote:
> I'm sure there must be documentation somewhere on how to do this, but 
> I can't find it.
>
> I want to setup a Linux or Mac OS machine to compile and link programs 
> for a Sun SPARC target.
> I know that gcc can be built to cross-compile for another platform, 
> but apart from specifying the target architecture, I don't know what 
> all I need to do.
>
> One thing that I'm sure of is that when this gcc is called, I need it 
> to ignore /usr/include and /usr/lib and pull things from some other 
> directory where I will have to have copied the SPARC versions.  Is 
> there a configuration option to tell it where those will be, or do I 
> have to somehow override them at runtime?
You put all you headers and libraries in some directory that will be 
called the 'sysroot', then you tell GCC's configure script where they 
are.  For my mipsel-linux cross compiler I configure like this:

$ ../gcc-4_2-branch/configure   --target=mipsel-linux 
--with-sysroot=/usr/local/mipsel-linux-test 
--prefix=/usr/local/mipsel-linux-test --with-arch=mips32 
--with-float=soft  --disable-libmudflap --disable-tls 
--enable-languages=c,c++

If you also need to create a suitable libc and header files I suggest 
you look at the crosstool project.

David Daney