cmake infrastructure for libsharp

[Luis Silva]

Hi,

I have a cmake infrastructure for libsharp that replaces the hardcoded
makefiles and autotools infrastructure. Would you accept a merge request for
this feature?

Cheers,

Luis Silva

[Martin Reinecke]

Hi Luis!

I have a cmake infrastructure for libsharp that replaces the hardcoded
makefiles and autotools infrastructure. Would you accept a merge request for
this feature?

Thanks for preparing the patch!
I'm fine with optional cmake support, but I definitely do not want to
abandon autotools, since they do not require external support tools,
which in my eyes is a big advantage.
I admit that the current state - with autotools being used to patch an
already existing configuration file - is far from optimal, but I'd
rather solve this by going to "proper" autotools usage, which will then
also allow out-of-tree builds etc.
Also, I don't have the necessary knowledge to enable cmake to use all
the specific optimization flags that libsharp requires to get its full
performance. The current cmake scripts for example don't enable
CPU-specific optimizations, which reduces performance by almost a factor
of 2 on my local machine.

Would you be interested in having cmake support as an additional option
in libsharp, but keping autotools as well?

Cheers,
Martin