Re: crosscompiling a crosscompiler ?

["Tobi Gschwendtner" <tobi at cte-electronic dot de>]

thanks.
building gcc actually worked after i copied the lib and include
directories from my linux->linux toolchain.

tobi


Brian Dessent (brian@dessent.net) schrieb:
>
> Tobi wrote:
>
> > i'd like to build a compiler running on cygwin with target
> > i586-unknown-linux-gnu.
> > is it possible to build a toolchain like this with a linux->cygwin
> > crosscompiler (already running on my linux box) ?
> > how can i tell crosstool to use a crosscompiler ?
>
> Sure it's possible, but probably not with crosstool.
>
> > i tried setting HOST=i686-pc-cygwin and  CC=i686-pc-cygwin-gcc
> > but it fails with
>
> That won't work.  First you need to build a linux->cygwin cross
> (build=linux, host=linux, target=cygwin), then you use that to produce
> the canadian cross (build=linux, host=cygwin, target=linux).  You don't
> do it by setting CC, you do it by setting build/host/target.
>
> Since you won't be using crosstool you will have to arrange for the
> target libc to be available for building target libraries (libgcc,
> libstdc++, etc) which is normally the difficulty that makes people turn
> to crosstool in the first place.  But if you have access to the libc on
> both systems it's not hard to just create a sysroot, populate it with
> the target libc+headers+startup objects, and give that as --with-sysroot
> when configuring.
>
> Brian
>
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>


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