[cmake-developers] [CMake 0012558]: ADD_LIBRARY should have an option to silence the warning if no source files are given

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
====================================================================== 
http://public.kitware.com/Bug/view.php?id=12558 
====================================================================== 
Reported By:                Gert Wollny
Assigned To:                
====================================================================== 
Project:                    CMake
Issue ID:                   12558
Category:                   CMake
Reproducibility:            always
Severity:                   feature
Priority:                   normal
Status:                     new
====================================================================== 
Date Submitted:             2011-11-04 12:06 EDT
Last Modified:              2011-11-04 12:06 EDT
====================================================================== 
Summary:                    ADD_LIBRARY should have an option to silence the
warning if no source files are given
Description: 
Sometimes it may be of interest to create a shared library by only linking other
libraries without adding additional source files. If one does this, cmake omits
a warning. It should be possible to add a flag to the ADD_LIBRARY command that
informs cmake that the the user knows what he is doing.

Example use case: in a plug-in framework I want to write tests that check the
functionality of the plug-in without having to go through the plug-in loading
framework. Therefore, a static library is created that contains the complete
plug-in code and the test program links against this static library. 
Then, to create the dynamically loadable plug-in I create such a sourceless
library that just relinks everything without adding additional code.

Steps to Reproduce: 
create an entry in CMakeLists.txt
ADD_LIBRARY(name MODULE) 
or similar. 

Additional Information: 
Attached is a patch against v2.8.6 that does provide a flag NO_SOURCE_FILES that
informs cmake that no warning should be emitted.



====================================================================== 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2011-11-04 12:06 Gert Wollny    New Issue                                    
2011-11-04 12:06 Gert Wollny    File Added: cmake-2.8.6-nosourcelib.patch       
            
======================================================================