add a link for building mlpack from source to index page of trac wiki

[rcurtin]

Reported by hustcalm on 23 Dec 43338221 00:52 UTC
As the index page of wiki(http://www.mlpack.org/trac/wiki), two minor changes may need to be made:

1. library dependencies

mlpack depends on the following libraries:

 LAPACK
 BLAS
 Armadillo >= 2.4.2
 LibXml2 >= 2.6.0
 Boost - program_options, math_c99, unit_test_framework, random 

if Armadillo, LibXml2 and Boost are enough to get mlpack run, do we consider to remove LAPACK and BLAS ?

1. add a link for building instructions

All of these should be available in your distribution's package manager.

Suggest to make it as:
All of these should be available in your distribution's package manager, for more information about installing these packages, please refer to http://www.mlpack.org/doxygen.php?doc=build.html.

[rcurtin]

Commented by rcurtin on 10 Aug 43340121 16:34 UTC
No, LAPACK and BLAS are (in general) necessary so that Armadillo will work. Usually this is handled by the package manager, but not always.

I won't link to the stable release's build instructions because they may be different. Instead when a user checks the package out with svn, they can look at the README.txt file for build instructions.

There is not a point filing bugs about things which "theoretically could be confusing to users" unless you actually have valid proof that they are confusing valid users (or in this case, developers).