The following issue has been SUBMITTED. 
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http://www.cmake.org/Bug/view.php?id=15658 
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Reported By:                Ben Boeckel
Assigned To:                
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Project:                    CMake
Issue ID:                   15658
Category:                   CMake
Reproducibility:            have not tried
Severity:                   minor
Priority:                   normal
Status:                     new
Target Version:             CMake 3.4
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Date Submitted:             2015-07-21 11:19 EDT
Last Modified:              2015-07-21 11:19 EDT
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Summary:                    Allow generator expressions in add_custom_command
(and add_custom_target)
Description: 
Now that LOCATION is disallowed, using a target path as an argument to a custom
command is not possible without warnings (or making CMP0026 OLD).

At least OUTPUT, COMMAND, MAIN_DEPENDENCY, DEPENDS, WORKING_DIRECTORY, and
SOURCES (for a_c_t) should expand generator expressions. Some may already do so
via properties being genex-expanded already (just WORKING_DIRECTORY IIRC).
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Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2015-07-21 11:19 Ben Boeckel    New Issue                                    
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