Static library build in Linux broken by PR #1555 #1680
Description
The following line on linux will not link anything into openfastlib_static if openfast_postlib is a static library.
This was addressed by PR #1010 but reverted in PR #1555
From the description of PR #1010 :
On Linux, the linker when creating a static library is ar. ar is just an archiver and doesn't really do a lot more than take a bunch of object files and stuff them in the static library (at least by default with Cmake). ar cannot link an existing library to the static library, one would have to extract the object files from the static library and then use ar to add them. With the current build system, when you try to link to the created static library on Linux, you get undefined references, because ar hasn't actually linked any of the sub-libraries like aerodyn etc.