Install QEPCAD in the download binaries

[Robert Pollak]

I would like to teach first-year students how to use ​QEPCAD to solve systems of rational inequalities (​example).

sage-6.2.ova displays the qepcad help with qepcad?, but it cannot be used:

qepcad('(E x)[a x + b > 0]', vars='(a,b,x)')
Traceback (click to the left of this block for traceback)
...
RuntimeError: Unable to start QEPCAD

[Robert Pollak]

Btw., I get the same error at ​http://www.sagenb.org/. This should also be fixed. At ​http://sagecell.sagemath.org/ qepcad integration works!

[Robert Pollak]

Same error at ​https://cloud.sagemath.com/, see ​this sage-cloud thread.

[Robert Pollak]

​The inclusion procedure says that qepcad needs to become an "optional package" first, and I assume that the current ​qepcad-1.50.spkg has similar problems as the 1.54 spkg from #10224.

So please close this ticket as invalid for now. (I don't have the rights to do this.)

[aapitzsch]

@jondo: run ./sage -i qepcad to install the experimental package

[Robert Pollak]

@aapitzsch: This fails to build on Linux Mint 17 (≡ Ubuntu 14.04 LTS).

[Jeroen Demeyer]

There are indeed too many systems on which this fails to install. Just got this error on my recent Gentoo Linux x86_64 system:

cd source; make   opt "CCo=g++" "FLAGSo=-O4" "CCd=g++" "FLAGSd=-g" "MAKE=make  "
make[1]: Entering directory `/usr/local/src/sage-git/local/var/tmp/sage/build/qepcad-1.50/src/qesource/source'
make[1]: *** No rule to make target `qepcad.a()', needed by `opt'.  Stop.
make[1]: Leaving directory `/usr/local/src/sage-git/local/var/tmp/sage/build/qepcad-1.50/src/qesource/source'
make: *** [opt] Error 2
Error making QEPCADB

[Robert Pollak]

I updated the description's QEPCAD link.

[Ralf Stephan]

The install fail is now #19450.