I would like to ask how to properly install a comprehensive LAPACK package
as e.g. is offered by the Gentoo package 'sci-libs/clapack' within a Ubuntu
environment.

I am not talking about atlas here, which only offers a small part of lapack
functionality, but a more general solution offering functions for e.g.
eigen value problems like 'dstegr'.

Here is what I achieved so far: My favorite search command

```
apt-file search clapack.h

```

offered only two possible sources.

```
libatlas-dev: /usr/include/atlas/clapack.h
libfreefem++-dev: /usr/include/freefem++/clapack.h

```

As mentioned, the atlas version is not, what I want. The libfreefem variation
on the other hand reads fine. So

```
apt-get install libfreefem++-dev

```

In addition

```
apt-cache search lapack

```

offers a lot, the most promising looking lines being

```
liblapack-dev - library of linear algebra routines 3 - static version
liblapack3gf - library of linear algebra routines 3 - shared version

```

the first package of which I installed. Now adding

```
#include <freefem++/clapack.h>

```

into my program returns an understandable long list of errors in the style

'integer', 'real', 'doublereal', ... was not declared in this scope

as in fact they were not. Anyways I am not looking
for freefem or atlas but just a running, usable LAPACK implementation
is there really no such thing for Ubuntu?

Rereading my own post I believe the question might also be boiled down to
"Where can I obtain a comprehensive header file for 'liblapack-dev'"?