Peter van Summeren wrote:
>
> The proof of the pudding is not that it has many ingredients.
> I want to use a CAS. First I used on my phone MaximaOnAndroid. It works
> fine and the formulas like sqrt(2+2sqrt(2)) come out like in TeX.
> I downloaded Maxima on my Debian(8) computer. It also works fine, but is
> limited.
> So, I read about Fricas.
> First I tried Fricas for Windows10. I first had to download Cygwin. I got a
> big window and a very small console with letters I could not read. Also:
> Fricas did not work in that.
Sorry for that. Unfortunately, due to changes in Cygwin old build
instructions no longer work. There are different ways of building
that do work, but instructions are not in official places (in
particular it is not clear what is best/simplest way of building)...
> Removing Cygwin seems to be very difficult and I gave up.
> Than I downloaded the binary for Fricas. Also, no good.
Care to say what the problem was?
> After that I
> downloaded the source, took care of the prerequisite packages. Not all were
> available in my Debian 8 system. The ones that were available, I installed.
> I got a Fricas with a console, with Hyperdoc. The graphics worked, also
> from the console. But the sqrt(2+sqrt(2)) is for me ugly on the console.
Have you tried 'efricas'? If you have prerequisities (TeX and friends)
it should give you nicely typeset formulas.
> MaximaOnAndroid is perfect.
> I looked at the configure.log. I send it hereby but the first failure was:
> =================start================
>
> configure:4249: gcc -E conftest.cconftest.c:9:10: fatal error:
> ac_nonexistent.h: No such file or directory
> #include <ac_nonexistent.h>
> ^~~~~~~~~~~~~~~~~~compilation terminated.configure:4249: $? =
> 1configure: failed program was:| /* confdefs.h */
> ================end=================
>
> How can this be? I have a good Debian8 system,
> I have the prerequisites.
This is really not error. More precisely, configure script deliberatly
triggers errors in compilation to learn about features of your system.
The 'ac_nonexistent.h' should be a giveaway: this file does not exist
and compiler (gcc) is supposed to detect that. On your system gcc
correctly reports that the file does not exist.
--
Waldek Hebisch
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