Date: Sun, 16 Feb 2020 00:27:40 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Palle Girgensohn <girgen@freebsd.org> Cc: freebsd-hackers@freebsd.org, Kirill Ponomarev <kp@krion.cc> Subject: Re: Why is not llvm-config executable included? Message-ID: <20200215222740.GW4808@kib.kiev.ua> In-Reply-To: <F28BE55B-3E33-4B7A-AD58-8B0A0077513C@FreeBSD.org> References: <D1A947BC-BCD9-4BAE-9D1B-EB1B433C1452@FreeBSD.org> <20200215185821.GV4808@kib.kiev.ua> <F28BE55B-3E33-4B7A-AD58-8B0A0077513C@FreeBSD.org>
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On Sat, Feb 15, 2020 at 11:10:44PM +0100, Palle Girgensohn wrote: > > > > 15 feb. 2020 kl. 19:58 skrev Konstantin Belousov <kostikbel@gmail.com>: > > > > On Sat, Feb 15, 2020 at 07:35:29PM +0100, Palle Girgensohn wrote: > >> Hi! > >> > >> I try to build postgresql with llvm from base in 13.0-CURRENT, but although it seems to me that llvm is indeed included in base, the executable `llvm-config` is not. PostgreSQL's build process expects to be able to use this to configure itself when building with llvm. > >> > >> Any ideas how to deal with this, apart from installing devel/llbm90 which seems a bit bonkers? > > > > If you need llvm you must install it from ports. The fact that /usr/bin/cc > > is clang with llvm behind it is somewhat accidental. > > > > One of the reason why llvm in base should not be used as llvm infrastructure > > is because llvm API and ABI is not stable across llvm releases, and exposing > > that would make compiler updates in stable impossible due to the stable > > branches guarantee of ABI stability. > > > > Another reason is that we generally do not want to make base depended on > > specific on llvm or any other compiler' internals. It should stay as > > (reasonably portable) C+gnu ext project. > > Ah, OK, makes sense. So if postgresql depends on llvm, it simply has to depend on the port, right? Same as any other consumer of llvm, for instance mesa-drm.
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