Re: Should I be able to build cross gcc 4.x on Cygwin?

[Rick Mann <rmann at latencyzero dot com>]

On Dec 12, 2007, at 3:47 PM, Brian Dessent wrote:

> Rick Mann wrote:
>
> > $ mkdir combined
> > $ cd combined
> > $ ln -s ../gcc-4.2.2/* .
> > $ ln -s ../binutils-2.17/* .
> > [several complaints from ln about existing links]
> > $ ln -s ../newlib-1.15.0/* .
> > [several complaints from ln about existing links]
> > $ cd ../..
> > $ mkdir testbuild
> > $ cd testbuild
> > $ ../src/combined/configure --target=xscale-elf --disable-nls --with-
> > newlib --prefix=/usr/local/xscale-elf-gcc --disable-newlib-supplied-
> > syscalls
>
> I don't like that method at all, because it does not actually combine
> anything, it simply takes the include/ dir from whatever tree you last
> linked it to.  In this case it looks like the include from newlib  
> wins,
> but it's not recent enough.  You want to actually combine the contents
> of all the include dirs in each package, not just select one.
>
> Try the method here instead: <http://gcc.gnu.org/simtest-howto.html>.
> This uses cpio to create hard links in the combined tree, which really
> does create a union of the trees, rather than simply picking one  
> version
> of each directory to use.

Okay, I'll try that. However, two things:

1) The above technique works fine on Mac OS X (I'm about to try Fedora).
2) Doesn't the first ln take precedence? The subsequent ones fail if  
the link already exists, don't they (hence the warnings)?

Thanks for the other pointer, though.

--
Rick