Date: Mon, 15 Jun 2015 11:31:17 -0600 From: Warner Losh <imp@bsdimp.com> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-embedded@freebsd.org" <embedded@freebsd.org>, "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org> Subject: Re: Starting to cross-compile non-base software for MIPS - what it's like Message-ID: <2ADF0848-4190-4D40-808B-DA6D539FA431@bsdimp.com> In-Reply-To: <CAJ-VmokS7ac7GHBSyajVJrenEa0s226xdrfAaDyPi4Rz=OfHXw@mail.gmail.com> References: <CAJ-VmonSXYdLP_VpGh%2B3N_WfGwDLqWGcuPvOCf4VkOd0pJ5QWg@mail.gmail.com> <CAJ-Vmom%2BkGODRk8eT4LyFRnwTJd2AHwgrR6cbrB7hE6Z8Cx_Vw@mail.gmail.com> <CAJ-VmomYqmkZimzpXgxJK00vDhxK%2BqUdMSk%2BxXXiaZ_qdE6COQ@mail.gmail.com> <CAJ-VmokS7ac7GHBSyajVJrenEa0s226xdrfAaDyPi4Rz=OfHXw@mail.gmail.com>
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[-- Attachment #1 --] > On Jun 15, 2015, at 12:21 AM, Adrian Chadd <adrian@freebsd.org> wrote: > > So, for what it's worth - after the relevant hacks to convince the > various stages to do their thing, I actually /do/ have a user/kernel > cross-built from gcc-4.9.2 up on both the mips32 emulator (qemu) /and/ > on real hardware (AR9331, MIPS24kc). > > The installworld fails because somehow the CROSS_TOOLCHAIN bits aren't > being included right, so the compiler bits aren't set right. Here, > COMPILER_TYPE=gcc and COMPILER_VERSION=40902 - with this, MK_GCC is > set to NO and the legacy c++ library isn't built. That’s actually correct. From about 4.8 and onward, clang and gcc should be using the same c++ runtime. Maybe our defaults are a bit messed up, since libgcov likely shouldn’t be tied to MK_GCC at all… With the clang introduction, we’ve not always had a good clear line about the different subtle aspects of clang vs gcc, and this may be one of them. > There's no compiler built with it though, so until I cross compile a > compiler package (and cross-compile pkg, grr) getting a compiler > /into/ the image is going to take some time. gcc does support the notion of building on host X to generate binaries that run on host Y that generate code for host Z. But that might be a bit of a stretch for our system. > But, it does boot and run fine, and cross-compiled binaries (eg > dropbear client/server) work fine, as well as crunchgen binaries > (rescue, bsdbox.) That’s cool! Warner [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJVfwvlAAoJEGwc0Sh9sBEAqX8P/32M9k39Ixiq1eq+6FIzgP/5 8DPaKn9XUXDlpdPsYlKTjLg51NfM57wZGySm9oWFxu95TSMf8iafcxLmdloWXxhZ KKSyqnPcSLrYrsUP+pccjbNsUih6fK/Nc3pvYmNIDet/zNv0lbo7HwiSrNLPW8QK I3flnXq+iThG8gFCno9dqCKBZIc3+HIt0+0SZZqO84z7Ct0uQOsQ4DwtqE3DNMPU 57b6CgnWSNrsXd6Ob6sQNe27WHogCS1nCQrzH0Fclkpe6xTF8k8lL6SARd0hP26M zso54R3zp5kmUlLTTgXMyRHzEnWBEDh/vahSEKru2mPBJnlsfVIDcMFXoWtv/3FV BDa0WlnmUudW35beuVw8CKrc4xLnHFn5WPXXp5Y+cjb8u62KTmUr1U9n8Nxba+2K eYpqzwbkG4nAyyPMVXjcs7hkPeWaKzSg8QM26Vetk2uLQ5g/s3jYEPWxzt48HhoP LGuBAT3PNMzzdYbvka6PL0CRlHTQh+XdcMuoVHVLMB+ULO4z2fWpP8GkGuQPuENP JOTWabErI/oHo3aWWwwoejwdqdlTOa4J8b5a0VEeqinXhc4EeJkhV26Yv/LgWLdh mcCqc5D+sxLlre9n3gEzYrgYzJYugyIvHJYAKMui0a3WooXjDosC+ee9YCPF3b8p FQsuBZMNrzCSB1evqPXN =5pqU -----END PGP SIGNATURE-----
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