cross-compilation documentation

[Daniel Jacobowitz]

On Sun, Jun 22, 2003 at 10:59:52PM -0400, Peter Barada wrote:
> 
> >Well, sure!  My script at http://kegel.com/crosstool does this:
> >1) configure glibc and do 'make install-headers'; a wee bit of hackery
> >    circumvents its urge to build everything
> >2) build and install bootstrap compiler
> >3) build and install real glibc
> >4) build and install real gcc
> >
> >My step #1 isn't pretty, but it only takes a couple minutes, and I'm
> >sure it's faster than what you described.  I thought you knew about
> >that already...
> 
> Yes I did.  I use the following Makefile fragment to get the headers:
> 
> glibc1: ${GLIBC_BUILDDIR1} glibc1-fix
> 	export PATH=${INSTALL_DIR}/bin:${HOST_INSTALL_DIR}/bin:$$PATH; \
> 	cd ${GLIBC_BUILDDIR1}; \
> 	CC=${TARGET}-gcc AR=${TARGET}-ar RANLIB=${TARGET}-ranlib \
> 	${GLIBC_SOURCE_PATH}/configure --host=${TARGET} \
> 	--prefix=/usr --without-cvs --disable-sanity-checks \
> 	--with-headers=${INSTALL_DIR}/${TARGET}/include ; \
> 	make cross-compiling=yes install_root=${INSTALL_DIR}/${TARGET} prefix="" install-headers
> 
> glibc1-fix:
> 	mkdir -p ${INSTALL_DIR}/${TARGET}/include/gnu ; \
> 	touch ${INSTALL_DIR}/${TARGET}/include/gnu/stubs.h ; \
> 	cp -f ${GLIBC_SOURCE_PATH}/include/features.h ${INSTALL_DIR}/include/features.h
> 
> 
> But this fragment *requires* a cross-compiler to build it.  I'm sure I

Not really.  I do it with a sufficiently new native compiler to run
configure.  Configure determines $target by the command line arguments,
not by querying the $CC you specify.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer