Help needed with using cross compilers
Thu Sep 2 13:15:00 GMT 1999
"Tom Williams" <firstname.lastname@example.org> writes:
> Hi! After spending lots of time building a cross compiler, I only now
> realized that I don't know how to use it! Yeah I know this is a stupid
> question but I would like to try to use my new Linux hosted
> sparc-sun-solaris2.7 cross compiler to build gcc-2.95 targeted for
> sparc-sun-solaris2.7. Basically, I want to use the cross compiler I built
> to build a native compiler for my Sun.
Ok, so you already have a cross compiler, that means the hard part is
done (and that you know the little tricks to get things working).
First thing first -- build a native binutils toolchain as well! GCC may
have trouble with Solaris as/ld (there are known bugs in Solaris ld
and known limitations in Solaris as):
$ mkdir obj
$ cd obj
$ /path/to/binutils-xxx/configure --target=sparc-sun-solaris2.7 \
$ make install prefix=/tmp/binutils-sparc-sun-solaris2.7
Now, gcc; something very similar.
$ mkdir obj
$ cd obj
$ /path/to/gcc-2.95.1/configure --target=sparc-sun-solaris2.7 \
$ make install prefix=/tmp/gcc-2.95.1-sparc-sun-solaris2.7
This will build in the path /usr/local (which of course you may want
to change to reflect where you want it on the destination machine!),
and then you install to temp directory /tmp/<...>. From there you can
tar it up and transfer to your solaris machine.
Few "2nd order" things to look out for:
- you may want to edit the specs file and make the value "0" instead
of "1" for cross_compile. This is used by the native compiler to
decide if it should search certain directories or not.
- you may want to double check to see what assembler features are
being turned on in gcc/auto-host.h and gcc/auto-build.h files.
Ignore this if it doesn't sense to you right now.
> Where can I get info on proper use of a cross compiler?
This list is a start, but mostly scattered all over the place.
Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/
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