Making CMake print commands before executing
I'm working on a large C++ project built with CMake on Linux. CMake runs okay, producing a horde of Makefiles in the tree of modules and applications. Running GNU make leads to linker errors. How can I get make to print out the exact commands before running them?
The -d option does not print the commands, but plenty of information that hasn't been helpful.
The -n option prints all the commands, but does not run them, so I can't tell were exactly the trouble is. Examining the stdout from make -n, I don't see any commands that are relevant. I suspect some commands change depending on the results of earlier commands, and the hierarchy of Makefiles makes it difficult to tell what's really going on.
I don't see any other options in make's man page that seem helpful.
Answer
I am fairly sure this will work:
make VERBOSE=1
You should also be able to add this to your CMakeLists.txt to permanently set that:
set(CMAKE_VERBOSE_MAKEFILE on)
This is covered in the CMake FAQ.