Singular

I just now compiled Singular-3-1-4 from source code on Ubuntu-12.04 (development branch), AMD-Athlon Processor server. The compilation was successful. However after compilation I seem to have lost some features of the Singular command window like TAB completion (of command). Further the usual key-strokes like backspace and arrow keys produce their escape characters (e.g. ^H, ^[[A,^[[C, etc). In other words the command window behaves like VT-100 terminal.

Any suggestions?

Thanks in advance.

VInay

Install readline (and the development package to readline)
(configure searches for libreadline.a/libreadline.so and readline.h)
Rerun configure and make at least in the subdirectories
Singular and kernel:

Ah! Thanks a lot. The libreadline-dev was the culprit. I didnt notice before compilation that this package was missing.

by the way how come it was not detected by config?

-- VInay

readline is optional.
If it is not found by configure a different way for input is used,
Depending on the existing libraries there are the following possibilities:
static readline, dynamic readline, emulated readline, fgets.
the Singular command outputs
(beside other tings) the chosen method

Can you please explain the difference between all 4? And how it is determined?

I could not trace much. I found variables in Singular/configure called ac_cv_*_readline. However I could not find the place these variables are set!

Also I found the #define's called HAVE_DYN_RL, HAVE_READLINE and FEREAD.


-- VInay

static readline: input via readline, requires libreadline.* and readline.h
uses HAVE_READLINE
emulated readline: input with line editing, requires libtermcap or libncurses
or libcurses, uses HAVE_FEREAD
fgets: input via fgets (if all other fail)
dynamic readline: input via readline if libreadline.so is available at runtime
used HAVE_DYN_RL, will never be set automaically by configure
(it is thought for binary distributions: works also without libreadline.so,
but take advantage of it if possible)