What I didn't mention before is that I didn't even change anything in CCS in between successful and failing builds. I didn't even close it. All I did was run Gmake from the command line, targeting this first hello world example. Which was, and still is, working ...
On Windows, open aDeveloper PowerShell. On Linux or macOS, open a Bash shell. #Clone the repositorygit clone git@github.com:SleipnirGroup/TrajoptLibcdTrajoptLib#Configurecmake -B build -S.#Buildcmake --build build#Testctest --test-dir build --output-on-failure#Installcmake --install bui...