This updated diff is for a pre-release version of bc-2.1.0 (expected to be similar to the release, except for possible last minute documentation enhancements or other non-functional changes).
The man-pages have received some updates, e.g. regarding the behavior in error situations.
This version differs from the previous one in a number of optimizations that have further improved the performance which now far exceeds other bc implementations in non-trivial test cases (e.g. the bc and dc currently in FreeBSD, but GNU bc, too).
A lot of regression tests have been added and the sources included in this review have been test-built on FreeBSD with clang-8.0.1, gcc-8.3.0, and gcc-4.2.1.
Run-tests have been performed with the amd64 and i386 versions (with more planned before the commit to FreeBSD).

Multiplication has been optimized and the overall performance of this version is now comparable to that of the GNU bc implementation.

Update to (not yet released) version 1.3.0.

I'd do not like the conversion to floating point for numbers outside the range of 64 bit integers. They violate assumptions I'd like to be able to make (e.g. that adding and then subtracting the same number leads back to the initial value in all cases).

The behavior is not consistent for shell arithmetic operating on parameters with or without "$" (e.g. "$((X))" vs. "$(($X))") for variables not in the range of valid integers.
This may be allowed by the standard, but is still somewhat surprising:

In D17969#383877, @bcr wrote:

Can you bump the .Dd of ctm.1 for this content change? The rest of the man page looks fine, thanks!

Apply suggestions regarding textual changes in ctm.c, ctm.1, and UPDATING.
This version is about to be committed.

Bump .Dd date in man-page as requested by bcr (Benedict Reuschling) and use the same date in UPDATING.
The date will be adjusted in both files, if the commit is delayed beyond Nov. 15.

Am 12.11.18 um 19:29 schrieb rgrimes:

rgrimes added a comment.

In D17935#383667 <https://reviews.freebsd.org/D17935#383667>, @imp wrote:
> I'd do a separate commit that just says 'CTM will move to ports in
> FreeBSD 13' in the ctm man page and get that merged before 12.0R (so
> ASAP).
Please do both the man page, and actually more importantly make the binary
spit out a warning that it is going away in 13, this to be merged to
stable/12 asap.  Man pages simply do not get peoples attention.  Also make
sure to mark this commits as relnotes: y.
Since I am involved now I can not approve it as re@, but it should see no
resistance.