Date: Wed, 11 Sep 2024 19:38:18 -0600 From: Alan Somers <asomers@freebsd.org> To: Charlie Li <vishwin@freebsd.org> Cc: Alan Somers <asomers@freebsd.org>, Aryeh Friedman <aryeh.friedman@gmail.com>, FreeBSD Mailing List <freebsd-hackers@freebsd.org> Subject: Re: Some rather stupid questions about Rust and FreeBSD Message-ID: <CAOtMX2gV9zFspNR0FtmgwGnCsqekMG-65BWKj4A08Y4Bf5LA=w@mail.gmail.com> In-Reply-To: <33fc2e5d-f135-4770-9ba6-cfae3a4ad120@freebsd.org> References: <CAGBxaXmeLQudhP428wCSEsGh0%2BbpiM8=To4HbohdwsGcsE5Qbg@mail.gmail.com> <CAOtMX2g0xcaDvXQLzntDs1cvzVx_wnTPTw7%2B1GV2KtS=AytOgg@mail.gmail.com> <33fc2e5d-f135-4770-9ba6-cfae3a4ad120@freebsd.org>
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[-- Attachment #1 --] On Wed, Sep 11, 2024, 7:33 PM Charlie Li <vishwin@freebsd.org> wrote: > Alan Somers wrote: > > On Wed, Sep 11, 2024 at 3:26 PM Aryeh Friedman wrote: > >> 1. It takes FOREVER to compile > > > > I assume you mean lang/rust. It does take FOREVER to compile, because > > it builds its own version of LLVM. That's why I suggest adding it to > > ALLOW_MAKE_JOBS_PACKAGES , if you're using Poudriere. Ordinary Rust > > programs generally compile at a similar speed as C programs. Slower > > than Go, but faster than C++. > > > rustc (lang/rust) supports using an existing LLVM toolchain > (devel/llvm*). Since LLVM 8.0, the Rust Project maintain their copy of > LLVM nearly the same way we do in base, and as such track the latest two > release branches. Using the PORT_LLVM option in the port reduces the > build time significantly (from not building LLVM) with no change in > runtime behaviour. > Oh, sweet. I need to try that out. What's the downside? Do you know why it isn't the default? > [-- Attachment #2 --] <div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Sep 11, 2024, 7:33 PM Charlie Li <<a href="mailto:vishwin@freebsd.org">vishwin@freebsd.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Alan Somers wrote:<br> > On Wed, Sep 11, 2024 at 3:26 PM Aryeh Friedman wrote:<br> >> 1. It takes FOREVER to compile<br> > <br> > I assume you mean lang/rust. It does take FOREVER to compile, because<br> > it builds its own version of LLVM. That's why I suggest adding it to<br> > ALLOW_MAKE_JOBS_PACKAGES , if you're using Poudriere. Ordinary Rust<br> > programs generally compile at a similar speed as C programs. Slower<br> > than Go, but faster than C++.<br> > <br> rustc (lang/rust) supports using an existing LLVM toolchain <br> (devel/llvm*). Since LLVM 8.0, the Rust Project maintain their copy of <br> LLVM nearly the same way we do in base, and as such track the latest two <br> release branches. Using the PORT_LLVM option in the port reduces the <br> build time significantly (from not building LLVM) with no change in <br> runtime behaviour.<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Oh, sweet. I need to try that out. What's the downside? Do you know why it isn't the default?</div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> </blockquote></div></div></div>
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