[cmake-developers] Using CMake to build big projects with cross-dependencies

[Bill Hoffman]

On 5/17/2018 11:46 AM, Brad King wrote:
> On 05/17/2018 05:56 AM, Kinga Kasa wrote:
>> cmake running for hours and hours (stuck at saying Configuring done,
>> eventually it will finish, but it runs for hours).
> That's not expected.  Even on projects with tens of thousands of
> source files and thousands of libraries and executables it typically
> takes only a few minutes.  You could try breaking in the debugger
> locally during generation to see what it's doing.  Or, you could
> try bisecting your project's content to get a smaller example that
> reproduces the long generation time.
Another quick way to see what is going on is to run cmake with the 
--trace option:
cmake . --trace

It will produce a lot of output but you should be able to see if it is 
repeating something or getting stuck on some operation.

-Bill