This is an implementation of POSIX
bc that implements
bc extensions, as well as the period
.) extension for the BSD flavor of
For more information, see this
bc's full manual.
bc also includes an implementation of
dc in the same binary, accessible
via a symbolic link, which implements all FreeBSD and GNU extensions. If a
dc binary is desired,
bc can be copied and renamed to
command is omitted; I believe this is poses security concerns and that such
functionality is unnecessary.
For more information, see the
dc's full manual.
bc is Free and Open Source Software (FOSS). It is offered under the BSD
0-clause License. Full license text may be found in the
bc should build unmodified on any POSIX-compliant system.
For more complex build requirements than the ones below, see the build manual.
make install will install the
For the default build with optimization, use the following commands in the root directory:
./configure.sh -O3 make make install
For debug builds, use the following commands in the root directory:
./configure.sh -g make make install
It is possible to download pre-compiled binaries for a wide list of platforms,
including Linux- and Windows-based systems, from
xstatic. This link always points to the latest
bc is robust.
It is well-tested, fuzzed, and fully standards-compliant (though not certified)
bc. The math has been tested with 30+ million random problems, so
it is as correct as I can make it.
bc can be used as a drop-in replacement for any existing
is also compatible with MinGW toolchains, though history is not supported on
bc has similar performance to GNU
bc. It is slightly slower on certain
operations and slightly faster on others. Full benchmark data are not yet
To see what algorithms this
bc uses, see the
Other projects based on this bc are:
bc. The busybox maintainers have made their own changes, so any bugs in the busybox
bcshould be reported to them.
bcThe maintainer has also made his own changes, so bugs in the toybox
bcshould be reported there.
bc is written in pure ISO C99, using POSIX 2008 API's.
bc uses the commit message guidelines laid out in
this blog post.
bc uses semantic versioning.
Items labelled with
(maintainer use only) are not included in release source
configure.sh The configure script. install.sh Install script. karatsuba.py Script for package maintainers to find the optimal Karatsuba number. LICENSE.md A Markdown form of the BSD 0-clause License. link.sh A script to link dc to bc. Makefile.in The Makefile template. NOTICE.md List of contributors and copyright owners. RELEASE.md A checklist for making a release (maintainer use only). release.sh A script to run during the release process (maintainer use only). safe-install.sh Safe install script from musl libc.
dist Files to cut toybox/busybox releases (maintainer use only). gen The `bc` math library, help texts, and code to generate C source. include All header files. manuals Manuals for both programs. src All source code. tests All tests.