On Mon, Nov 28, 2016 at 12:19 AM, Abou Al Montacir <abou.almonta...@sfr.fr> wrote: > For now you can use multi-arch to install fp-compiler
No, you can't (that was the first thing I thought of): fp-compiler:i386 depends on binutils:i386 rather than binutils-i586-linux-gnu, and binutils:i386 isn't multiarch installable. You'd have to do a full cross chroot, currently. But once the dependency part is fixed, /etc/fpc.cfg can `#INCLUDE /etc/fpc/$FPCTARGET.cfg` and put `-e/usr/i586-linux-gnu/bin -Fl/usr/lib/i386-linux-gnu -Fl/lib/i386-linux-gnu -Fl /usr/lib32 -Fl/lib32` in there (each of those .cfg files will have to be manually written/installed based on the Debian arch (of the fp-compiler package), the Debian triple (subdir of /usr/lib), the legacy libdir (/lib32 - actually not sure if this is necessary or not anymore), the GNU triple (of binutils), and the FPC target (for choice of the filename)). Incidentally, managing /etc/fpc.cfg through update-alternatives is a waste since it could be implemented as just `#INCLUDE /etc/fpc-$fpcversion.cfg` (though since jessie has 2.6.4, an appropriate upgrade path would need to be written). The above is fairly trivial and will get you a multiarch "cross" compiler, with /etc/ ready for real (non-multiarch fp-compiler (I *think* the libc6-*-cross packages are only needed because of ld.so conflicting. but fp-units-* are actually multiarch safe already, they're just not marked as such - they put all their files in /usr/lib/fpc/$fpcversion/{units,fpmkinst}/$FPCTARGET/ already)) ones. Then it's just a SMOC to actually build real cross-compilers binary packages from the Debian source package. I should probably write a tool to hack-up what I've described above by using `apt-get download` and extracting/modifying the .deb files. Maybe test it on Jessie since it has backports to test multiple *versions* too. > then just use a shell script to call call the right FPC using qemu The shell script is unnecessary if you install qemu-user-binfmt (or qemu-user-static, which `Provides:` it). -Ben