[with spkg] cvxopt fix completely breaks building Sage with gfortran

[was]

> 
> Compiling from source using gcc-4.2.2, I get
> 
> ***
> x86-Linux, ia64-Linux
> ***
> While compiling cvxopt-0.8.2.p4, I get
> 
> gcc -pthread -shared build/temp.linux-i686-2.5/C/base.o
> build/temp.linux-i686-2.5/C/dense.o
> build/temp.linux-i686-2.5/C/sparse.o
> -L/home/kate/sage/sage-2.8.12-x86-Linux/local/lib
> -L/home/kate/sage/sage-2.8.12-x86-Linux/local/lib/gcc-lib/i686-pc-linux-gnu/4.0.3
> -lm -llapack -lblas -lf95 -o build/lib.linux-i686-2.5/cvxopt/base.so
> /usr/local/binutils-2.17/x86-Linux-gcc-4.1.1/bin/ld: cannot find -lf95

That's because you're using gfortran.  Evidently Josh's fix for cvxopt not fully working
fails for people using gfortran.  I'll open a trac ticket. 

This either has to be properly fixed, or cvxopt has to be removed or something. We need to make sure we fully support using gfortran. Perhaps we should just completely switch to using gfortran and make having gfortran installed a requirement for building sage. Tempting.

[mabshoff]

Waiting on feedbackk from Kate, but there is a new spkg by Josh:

 http://sage.math.washington.edu/home/jkantor/spkgs/cvxopt-0.8.2.p5.spkg

Cheers,

Michael

[jkantor]

The spkg in 1161 incorporates the fix for this and also upgrades cvxopt to a newer version.

[mabshoff]

superseded by #1161, which also contains this fix.