Date: Fri, 20 Jun 2008 16:52:32 -0400 From: "Alexander Sack" <pisymbol@gmail.com> To: "Garrett Cooper" <yanefbsd@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Cross platform building best practices (building 6 on 7) Message-ID: <3c0b01820806201352n54b846cas612a6923531ef04@mail.gmail.com> In-Reply-To: <7d6fde3d0806190822s1420dcake3a38be7189b8ab0@mail.gmail.com> References: <3c0b01820806190629o7264cfaeg6fa6a08a6822047e@mail.gmail.com> <7d6fde3d0806190822s1420dcake3a38be7189b8ab0@mail.gmail.com>
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On Thu, Jun 19, 2008 at 11:22 AM, Garrett Cooper <yanefbsd@gmail.com> wrote: > On Thu, Jun 19, 2008 at 6:29 AM, Alexander Sack <pisymbol@gmail.com> wrote: >> Hello Folks: >> >> I've done a lot of Googling and scouring the lists about this >> particular subject so I apologize for rehashing it. However, I'm >> still confused on what's the best way to perform BSD cross platform >> builds. Ideally what I want to have is an environment whereby I can >> build a 6.1-RELEASE tree on a 7.0-RELEASE box. I thought originally I >> could check out a 6.1 release version, perform make world, and then >> use the output of that build as either a basis for a jail or a >> toolchain. However, as noted by previous threads, 6.x doesn't build >> on a 7.x due to gcc4/binutils compatibility issues (please correct me >> if I'm wrong). I then thought I could potentially download a patched >> binutils, copy it into src/contrib/binutils and that would potentially >> fix it. No dice (and I'm still debugging why since this binutils >> package DOES build outside of the make world infrastructure without >> issue, this very well could be pilot error on my part since I didn't >> update the VERSION string and didn't trim the source files as per the >> FreeBSD-deleteList etc.). >> >> I THEN thought if I build/install a gcc-3.x/bintuils toolchain I could >> complie a 6.x on a 7.x machine. Well I haven't done that yet since at >> this point I believe I'm diverged from the path of FreeBSD build >> enlightenment! Moreover, if would be NICE if I could bootstrap the >> normal dev tools from the exiting make world build tree. I'm not yet >> ready for a lot of hackery on the build tree without asking around. >> :D! >> >> Does anyone due cross-platform builds (without host virtualization)? >> >> Thanks! >> >> -aps > > (I'll stick to just hackers@ because I don't want to pollute > questions@ unnecessarily) Sorry I felt really bad actually cc'ing questions its just that my last groking produced many threads in freebsd-questions as opposed to hackers. I'll try to be more attentive to my posts (I have a habit cc'ing multiple forums because sometimes they apply but questions is for normal troubleshooting, not cross-platform build issues!). > You touched on an important point. There were some code quality issues > (I think) with 6.x that were resolved moving to 7.x, which caused > gcc-4.2.x to barf. Probably but I'm not trying to point fingers! :D! > gcc-4.2.x requires a newer version of binutils, just because (for API > / usage compatibility). Yea understood. To be honest, this isn't documented very readily. I first thought it was pilot error on me, then I decided to take a look at what failed to compile (I believe it was an innocent extern). And then got lost in gcc/binutils hell. Luckily I've smelled this problem before and after some research confirmed by suspicion. > What you should probably do is create a jail then do your development > for 6.x in a jail, 7.x in another, and (if you're bold enough ;)...) > do 8.x development in yet a third. Jail's are a much better way to > isolate things such that you don't have to worry about toolchain > issues like these and are able to setup a sourcebase as the devs > intended it (for the most part; you may run into issues with sysctls > and virtual kernel stuff like that, but cest la vie... there isn't a > better way I know of than that outside of running a VM). I figured you were going ot say that Garrett. Well OK, but I still need to bootstrap my dev environment for 6.x development on 7.x. Since binutils compatibility makes my 6.x make world barf on 7.x, where should I go? I HAVE not parsed through a lot of the build infrastructure yet but it would seem to be IF make world bootstraps the world including the development tools, why can't I update binutils/gcc inplace and then compile (or is this a regression issue which I failed to grasp). Or do I need to update binutils on my *host* system itself? i.e. what I'm really asking is does make world bootstrap the right bintuils/gcc etc. and then use THAT to compile the rest or does it just perform a host build of everything and plops it in DESTDIR? Hope I make some sense here (still a n00b).... -aps
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