[CMake] combining static libraries

[James C. Sutherland]

I have a situation where I have a few TPLs that are built via auto  
tools and another project with CMake.
	tpl1 -> lib1
	tpl2 -> lib2
	myproject -> libmyproj

I would like to combine the two TPLs into my project library.  From  
looking at previous postings on this list, it seems that it was not  
possible a few years ago.  Is that still the case?

It seems that there are two recommended options:

1. absorb tpl1 and tpl2 into the CMake build system and build the  
single library together.  This is not a pleasant option since I don't  
want to recreate the build systems for tpl1 and tpl2 in CMake.

2. Set up an install for myproject that allows CMake's "find package"  
to automatically set lib1 and lib2 as required libraries

Are these the only two options, or does CMake now allow one to combine  
static libs?

Thanks for any tips,

James