Date: Mon, 7 Jan 2019 12:45:46 -0700 From: Gavin Howard <gavin.d.howard@gmail.com> To: cem@freebsd.org Cc: Dimitry Andric <dim@freebsd.org>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: GNU-compatible, BSD-licensed bc Message-ID: <CAF=dzRNJMvNq0yiPPdWNk-F8--RPX3D6aydLpmLLX3xyvMAoQw@mail.gmail.com> In-Reply-To: <CAG6CVpU-rgUVvWYDA%2B2qw62hzK1xOEqVwmXGSx2yrfqNMX8e7w@mail.gmail.com> References: <CAF=dzRNnurahLBOaKgq8_bDXNuM8biYPFbj6F2vp0t58Ejp8bg@mail.gmail.com> <A6C4B09B-4156-47A4-89B0-80E8688D59FC@FreeBSD.org> <CAG6CVpU-rgUVvWYDA%2B2qw62hzK1xOEqVwmXGSx2yrfqNMX8e7w@mail.gmail.com>
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On Mon, Jan 7, 2019 at 11:06 AM Dimitry Andric <dim@freebsd.org> wrote: > > On 7 Jan 2019, at 19:35, Gavin Howard <gavin.d.howard@gmail.com> wrote: > > > > I am the author of a GNU-compatible, BSD-licensed bc > > (https://github.com/gavinhoward/bc). I noticed (on > > https://wiki.freebsd.org/GPLinBase) that FreeBSD used to use the GNU > > bc until it was taken out because of the GPL. My bc is not licensed > > under the GPL; it is under the 0BSD license. Thus, I think my bc might > > be a great fit for FreeBSD. > > > > My bc is well-tested. I make sure that every single memory bug that I > > can find is out before every single release. I also make sure that my > > bc's math is correct by running millions of random math problems > > before every release. > > > > My bc is extremely portable; it easily builds on any POSIX > > platform. And it includes a full dc as well (except for the "!" > > command). > > > > I would love to work with the core team to get my bc into FreeBSD, if > > there is interest. I am about to do a release, and I am willing to > > delay the release to get it up to par for FreeBSD. > > > > Would there be interest? > > You are 9 years late. :-) > > https://github.com/freebsd/freebsd/commit/bc4e1f6f87a770761be30eb708cbef88bc4d9536 > > That said, are you aware of any great differences between your bc and > the one originally from OpenBSD? Yes. See below for the important one. The non-important ones include the fact that I support *every* GNU extension. That includes array references, void functions, the "halt" keyword, etc. On Mon, Jan 7, 2019 at 12:24 PM Conrad Meyer <cem@freebsd.org> wrote: > > Thanks Gavin, > > I think this could be valuable for us. Our bc is not GNU-compatible > today and that causes some pain. > > For example, fusefs-lkl requires the gnubc port to build because the > base bc lacks some functionality that GNU has, and of course lkl uses > the gnu bc functionality. So a BSDL bc that is actually > GNU-compatible seems attractive to me. > > The script in question can be found here: > https://github.com/torvalds/linux/blob/master/kernel/time/timeconst.bc > and it is invoked like: "echo 100 | bc -q path/to/timeconst.bc". > > It can be reduced to the following short test case with the same invocation: > > a = read(); > print "a: ", a, "\n" > > In-tree BSD bc prints "dc: not a string" on stderr and with the > simplified test case, "a: 0\n100\n" on stdout. > > GNU bc prints "a: 100\n" on stdout, as expected. (I have not tried Gavin's bc.) > > Best, > Conrad My bc handles the Linux timeconst.bc script with aplomb from 0 to (at least) 1000. It is part of my test suite, actually. You can try it out by running the following command after building my bc (where BC_ROOT is the root directory of my bc): $ "$BC_ROOT/tests/bc/timeconst.sh" /location/of/timeconst.bc It won't have any output besides "Running timeconst.bc..." unless it didn't pass the test. Also, this bc builds out of the box on FreeBSD. I have already made sure of that. Just use: $ cd "$BC_ROOT" $ ./configure.sh -O3 $ make Gavin Howard
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