On 09/01/2010 02:21 PM, Jakub Jelinek wrote: > On Wed, Sep 01, 2010 at 02:06:37PM +0200, Ralf Corsepius wrote: >>>> - Fedora's rpm and some components the build-infrastructure have serious >>>> issues related to cross-building. >>>> >>>> - A cross compiler alone is not worth it, you need a whole zoo of >>>> further cross-target packages to make it usable. >>> I don't see why. >> You'd need at minimum the infrastructure gcc itself needs, e.g. glibc, >> kernel-headers, mpfr, mpc, libelf, ppl, cloog etc. > > You don't need mpfr, mpc, ppl, cloog nor libelf, all those are host > libraries, not target libraries. cc1/cc1plus links against them or dlopens > them. Yes, you are right. I was confused by me also building GCC Canadian-X and building for distros which are not equipped with suffient versions of these libraries (Try building gcc-4.5.x on CentOS4/CentOS5). > For cross gcc I guess the important question is, do we want gcc-4*.src.rpm to > build all the cross compilers (and, is C enough, or do we need C++ too?), or > do we have one cross-gcc-4*.src.rpm that semi-loosely tracks gcc-4*.src.rpm > and builds all the cross compilers (BuildRequires all the cross-binutils and > all cross-glibc/kernel-headers), or each cross would have its own src.rpm? The latter is what I am doing for my cross-toolchain rpms. > I think the last one would be a maitanance nightmare. Not necessarily, because different target's/target OS toolchains tend to diverge (Not all targets suffer from the same bugs), so using separate *src.rpm and patches for individual toolchains might even be advantageous. > I hope cross Fortran and especially cross Java (or cross Ada/ObjC/ObjC++) Cross-Fortran/Objc for mainstream distros/targets is often pretty harmless. Cross-java and Ada are a nightmare. Ralf Ralf -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
