On 06/09/2007 11:23 AM, Hans de Goede wrote: > David Woodhouse wrote: >> On Fri, 2007-06-08 at 13:56 -0600, Brendan Conoboy wrote: >>> Building a cross binutils requires kernel headers for the target >>> architecture. Building gcc requires kernel headers and glibc. There >>> are scripts to solve the initial chicken/egg problem of where to get >>> that glibc for a new arch. At some point in the future gcc might not >>> require glibc to build, but we aren't there yet. >> >> Before we get to actually cross-compiling something for release, it >> would be good to get cross-compilers into Fedora. >> >> Making a cross-binutils package isn't hard; it's a relatively >> modification to our existing binutils package to make it build for >> multiple %targets. >> >> Making a cross-gcc package which targets linux-elf is harder, because of >> the evil recursive dependencies to which you refer above. It would be >> good if we could get that working though. >> >> Unfortunately the scripts to which you refer just 'solve' the problem by >> throwing everything together into one huge lump and building gcc, then >> glibc, then rebuilding gcc again. That's not really very useful for us >> when we want the compiler and glibc to be entirely separate packages -- >> and in fact glibc would be a .$TARGET.rpm to be installed into the >> sysroot, while the compiler is a native package. >> >> I haven't looked at this for a while, but IIRC we can build gcc and >> libgcc.a directly, using 'only' header files which can be provided in >> advance. The problem is that we have to dynamically link libgcc.so with >> libc.so? We don't actually need a _real_ libc.so for that though, do we? >> We could just make a dummy DSO with the functions we want, and link >> against that? If we do that, what else still has recursive dependencies? >> > > Notice that I have spends weeks on fixing exactly the problems, with > creating a cross compiling gcc targeting linux with glibc, described > here to build an cross arm toolchain for the gp2x handheld for Fedora. > > Please check: > http://people.atrpms.net/~hdegoede/ > > For all my SRPMS / SPECS for this, with regards to solving the above > metioned problems esp arm-gp2x-linux-gcc.spec is interesting. I think > I've got this one nailed, so before other people start pouring time into > this please first check my work, doing this for other linux-glibc > targets, using Fedora sources instead of the open2x sources I'm using > should be mostly identical. I'll gladly answer any questions. > > Reviews would be welcome to, see: > http://fedoraproject.org/wiki/SIGs/Embedded > > For links to all the review tickets. Thanks for your post Hans; Didn't knew there already is an Embedded SIG; And also that there are already people working on good cross compilers. So there's another cross specialist :-) -of -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
