lfs -> Ubuntu cross compiler w/ apt?

I built myself a compiler that can compile binaries for ubuntu (using
their libraries).  Originally I just used the standard LFS compiler,
but later on had a few messages that I believe were complaining that
my glibc was newer then ubuntu's.  (was long ago,  don't quite recall
the exact message).

To work around this, I built a

First, I grabbed a few of the ubuntu .deb files, and converted them w/
the deb2tgz utility.

install -d -m755 /usr/x86_64-ubuntu1104-linux-gnu/sysroot

tar -xf src/libc6_2.13-0ubuntu13_amd64.tar.xz -C
/usr/x86_64-ubuntu1104-linux-gnu/sysroot
tar -xf src/libc6-i386_2.13-0ubuntu13_amd64.tar.xz -C
/usr/x86_64-ubuntu1104-linux-gnu/sysroot
tar -xf src/libc6-dev_2.13-0ubuntu13_amd64.tar.xz -C
/usr/x86_64-ubuntu1104-linux-gnu/sysroot
tar -xf src/libc6-dev-i386_2.13-0ubuntu13_amd64.tar.xz -C
/usr/x86_64-ubuntu1104-linux-gnu/sysroot
tar -xf src/linux-libc-dev_2.6.38-11.48_amd64.tar.xz -C
/usr/x86_64-ubuntu1104-linux-gnu/sysroot
tar -xf src/ia32-libs_20090808ubuntu13_amd64.tar.xz -C
/usr/x86_64-ubuntu1104-linux-gnu/sysroot
tar -xf src/libltdl7_2.2.6b-2ubuntu3_amd64.tar.xz -C
/usr/x86_64-ubuntu1104-linux-gnu/sysroot

fixed up a few absolute symlinks,

rm /usr/x86_64-ubuntu1104-linux-gnu/sysroot/lib64
ln -sv lib /usr/x86_64-ubuntu1104-linux-gnu/sysroot/lib64
#fix absolute symlinks
cd /usr/x86_64-ubuntu1104-linux-gnu/sysroot/usr/lib/x86_64-linux-gnu
for x in *; do if [ -h "$x" ];then LINK=../..`readlink $x`; ln -sf
$LINK $x; fi; done
cd /usr/x86_64-ubuntu1104-linux-gnu/sysroot/usr/lib/
ln -sf x86_64-linux-gnu/* .
cd /usr/x86_64-ubuntu1104-linux-gnu/sysroot/lib
ln -sf x86_64-linux-gnu/* .

rm /usr/x86_64-ubuntu1104-linux-gnu/sysroot/usr/include/asm
ln -sfv x86_64-linux-gnu/asm
/usr/x86_64-ubuntu1104-linux-gnu/sysroot/usr/include/asm

then rebuilt binutils/gcc using the sysroot flag  (I used the same
versions from LFS, so perhaps a bit newer then ubuntu's)
../binutils-${BINUTILS_VERSION}/configure --prefix=/usr \
  --target=x86_64-ubuntu1104-linux-gnu \
  --with-sysroot=/usr/x86_64-ubuntu1104-linux-gnu/sysroot &&
make &&
make install &&

../gcc-${GCC_VERSION}/configure --prefix=/usr \
  --target=x86_64-ubuntu1104-linux-gnu \
  --with-sysroot=/usr/x86_64-ubuntu1104-linux-gnu/sysroot \
  --enable-shared --enable-threads=posix \
  --enable-__cxa_atexit --enable-languages=c \
  --disable-libstdcxx-pch \
  --enable-long-long \
  --disable-libgomp --disable-libquadmath \
  --without-ppl --without-cloog &&
make -j6 &&
make install &&

(I based this upon my linux -> mingw64 compiler, may have a few extra
flags.   I'll have to investigate later.  although I don't think I
disabled any features I actually use)






It works fine and dandy, but I was wondering if I should be worrying
about the updates in ubuntu, and how hard it would be to setup an apt
repository and just pull the updates directly from ubuntu into a
sysroot folder.  Would save time compared to hunting down the .deb's
then converting them manually.

-- 
Nathan Coulson (conathan)
------
Location: British Columbia, Canada
Timezone: PST (-8)
Webpage: http://www.nathancoulson.com
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