[CMake] Buggy progress reporting

[Bill Hoffman]

Gopala Krishna wrote:
> Hi, I have come across a buggy percentage reporting.
> 
> To produce the bug:
> 1) Run cmake on a project directory (i used kdesdk)
> 2) I then started 'make' in <builddir>/kdesdk/umbrello and waited
> until progress rose up to some arbitrary 23%
> 3) I invoked 'make' in another terminal in the <builddir>/kdesdk/kate
> directory while the previos make was progressing.
> 4) kate started properly with 0% while umbrello make suddenly started
> again from 0%
> 
> In brief, I ran "cmake" on an outer directory and invoked "make" in
> the sub-directories of outer directory at different times, yet in
> parallel.
> And after the invocation of latest make, the percentage reporting of
> previous 'make' invocation dropped to 0%
> 
> OT: I am developing a plasmoid to show the make progress output for
> cmake based make files which is where i came across this behavior.
> 
> Here is the sample terminal output
> 

The progress reporting only supports one make at a time in the build tree.

-Bill