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[Lapack] LAPACK: build system, implicit dependencies record

Dear LAPACK team,

I just stumbled across an annoyance when building application code 
against a library which in turn depends on LAPACK and BLAS. The 
application code and library are entirely written in C/C++ and built 
with CMake.

Now, at the final executable linking step, everything is put together, 
including liblapack.a and friends. As the linker would be C++ (for 
example), and whole application code is C++, the build system is not 
aware of the fact that the standard Fortran libraries need to be linked 
as well as LAPACK is on stage. Depending on what LAPACK was built with, 
those "standard libraries" may actually change.

This is a dilemma that's been discussed on the CMake mailing list 
several times 
(http://www.cmake.org/pipermail/cmake/2010-July/038172.html, 
http://www.cmake.org/pipermail/cmake/2011-January/041992.html), and of 
course LAPACK is not the only affected library.

As Brad King points out, the clean solution for this situation would be 
that each library that is built provides a file with build info to be 
installed along with the .a file. Many libraries do that via 
*Config.cmake files.

Are there plans within LAPACK to implement a similar thing?

Cheers,
Nico

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