Date: Sat, 15 Feb 2020 10:01:34 +0000 From: bugzilla-noreply@freebsd.org To: ppc@FreeBSD.org Subject: [Bug 244102] r357959/lib/clang/libllvmminimal fails buildworld with cc1plus: error: unrecognized command line option "-std=c++11" Message-ID: <bug-244102-21-w1qHNUVVsM@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-244102-21@https.bugs.freebsd.org/bugzilla/> References: <bug-244102-21@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244102 Mark Millard <marklmi26-fbsd@yahoo.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |marklmi26-fbsd@yahoo.com --- Comment #2 from Mark Millard <marklmi26-fbsd@yahoo.com> --- You are attempting to jump from the gcc 4.2.1 based environment to well past it being supported (via a source code based upgrade sequence). /usr/src/UPDATING has an entry: 20191226: Clang/LLVM is now the default compiler for all powerpc architecture= s. LLD is now the default linker for powerpc64. The change for powerp= c64 also includes a change to the ELFv2 ABI, incompatible with the exis= ting ABI. The modern toolchain requires expects that the compiler and related toochain is llvm/clang based. Bootstrapping via source is non-trivial. I expect that it is an old g++ 4.2.1 that is complaining about the -std=3Dc++11 . See also: https://lists.freebsd.org/pipermail/freebsd-ppc/2019-December/011042.html Which says in part: As of r356113 (__FreeBSD_Version 1300070) Clang is now the default compiler for all PowerPC targets. . . . As mentioned before, the powerpc64 change is also a change to the new ELFv2 ABI, which is binary incompatible with the previous ABI. Therefore, it is recommended to perform a complete reinstall of the system on powerpc64 platforms. (Note: It was a bit before everything was in place.) Trying to bootstrap via source from a g++ 4.2.1 environment is likely not worth the effort. There are some instructions at: https://wiki.freebsd.org/powerpc/llvm-elfv2 but it starts out saying: Reinstalling from the latest snapshot is highly preferable to doing a source upgrade! You have been warned! I'm still in the middle of writing this, don't follow these instructions ye= t! -- Bdragon28 2020-01-08 02:12:58 As a separate issue: head -r357549 broke powerpc64 on at least old PowerMac G5 "Quads" and the issue was only recently identified. No fix is checked in last I looked. I'd target head -r357548 or somewhat before. -r357276 has a snapshot but I do not remember its status. Later snapshots are too late. There is also -r357530 at: https://artifact.ci.freebsd.org/snapshot/head/r357530/powerpc/powerpc64/ --=20 You are receiving this mail because: You are the assignee for the bug.=
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