julia compilation

[Marco van Hulten <marco@hulten.org>]

Hello—

When I am installing `julia', the compilation does not finish.  It hangs
for more than 10 hours at


guix package -i julia
...
iostream (2)              |    0.98  |  0.00  |  0.0 |  2.66      | 1452.52                                                                                                     │
WARNING: Method definition f(Tuple{Vararg{Int64, N}}, AbstractArray{T, N}) in module Test51Main_specificity at /tmp/guix-build-julia-0.6.0.drv-0/julia-0.6.0/test/specificity.jl│
:87 overwritten at /tmp/guix-build-julia-0.6.0.drv-0/julia-0.6.0/test/specificity.jl:93.                                                                                        │
specificity (2)           |    0.34  |  0.00  |  0.0 |  1.10      | 1452.52                                                                                                     │
fft (2)                   |   46.25  |  1.39  |  3.0 | 533.68     | 1452.52                                                                                                     │
dsp (2)                   |   15.63  |  0.66  |  4.2 | 247.45     | 1452.52                                                                                                     │
examples (2)              |   82.05  |  1.34  |  1.6 | 617.55     | 1452.52                                                                                                     


There is swapping going on; my system only has 2 GiB of RAM.  But CPU
utilisation is close to zero.

The version of Julia is 0.6.0; but the current stable release is
0.6.2.  If someone has time, it would be good to increase the version.
The testing version 0.7.x would be fine as well, as many people seem to
use it already.

—Marco