[CMake] cmake-server, path length for pipe

[Andreas Naumann]

Hey cmakers,

I use visual studio code with the extension "vscode-cmake-tools" [1]. 
This extension uses the cmake-server functionality,
Recently, I have encountered the strange error message
     [cmake-server] CMake Error: Internal Error with 
<longPath>/release/.cmserver.18775: EADDRINUSE

where the length of longPath is 101 characters. The same error is also 
discussed in the issue 197 in [2].

After that, I did two small tests using the cmake server. Starting from 
the longPath above, I tried

     cmake -E server --experimental --pipe=`pwd`/release/foo
and
     cmake -E server --experimental --pipe=./release/foo

The first test led to the error, whereas the second one worked.

Is there a path length restriction for the cmake server?

And there is an error in the cmake-server manpage. The pipe argument is 
"--pipe=<named pipe> " instead of "--pipe <named pipe>"

I used cmake version 3.9.5.

Regards,
Andreas



[1] https://github.com/vector-of-bool/vscode-cmake-tools/
[2] https://github.com/vector-of-bool/vscode-cmake-tools/issues/197