[cmake-developers] [CMake 0015093]: PARENT_SCOPE empties variables when recursived used

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
====================================================================== 
http://www.cmake.org/Bug/view.php?id=15093 
====================================================================== 
Reported By:                abma
Assigned To:                
====================================================================== 
Project:                    CMake
Issue ID:                   15093
Category:                   CMake
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
====================================================================== 
Date Submitted:             2014-08-18 02:05 EDT
Last Modified:              2014-08-18 02:05 EDT
====================================================================== 
Summary:                    PARENT_SCOPE empties variables when recursived used
Description: 
when a PARENT_SCOPE'd variable is set to a value of a PARENT_SCOPE'd variable,
both are empty:

set(a "a" PARENT_SCOPE)
set(b "${a}" PARENT_SCOPE)


expected result:

a = "a"
b = "a"

but in real both are empty!


Additional Information: 
can be workarounded:

macro(MakeGlobalVar varname)
	set(${varname} ${ARGN} PARENT_SCOPE)
	set(${varname} ${ARGN})
endmacro()


MakeGlobalVar(a "a")
MakeGlobalVar(b "${a}")


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

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2014-08-18 02:05 abma           New Issue                                    
======================================================================