[cmake-developers] [CMake 0011880]: For Visual Studio 2010, adding /Y- (don't use precompiled headers) to a source file's properties does not remove the /Yu flag

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://public.kitware.com/Bug/view.php?id=11880 
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Reported By:                Brad Town
Assigned To:                
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Project:                    CMake
Issue ID:                   11880
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   low
Status:                     new
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Date Submitted:             2011-02-18 13:22 EST
Last Modified:              2011-02-18 13:22 EST
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Summary:                    For Visual Studio 2010, adding /Y- (don't use
precompiled headers) to a source file's properties does not remove the /Yu flag
Description: 
Adding the /Y- flag (don't use precompiled headers) does not remove the /Yu flag
(use precompiled headers), so when viewed in Visual Studio, such a file appears
to still use precompiled headers. However, the command line shows that /Y- is
added and overrides /Yu.

Steps to Reproduce: 
Consider the following:

--- cut here ---
if (MSVC)
    set_target_properties(FooProj PROPERTIES COMPILE_FLAGS "/YuFoo.h")
    set_source_files_properties(Foo.cpp PROPERTIES COMPILE_FLAGS "/YcFoo.h")
    set_source_files_properties(FooNotUsingPch.cpp PROPERTIES COMPILE_FLAGS
"/Y-")
endif ()
--- cut here ---

Adding the /Y- flag does not remove the /Yu flag, so when viewed in Visual
Studio, FooNotUsingPch.cpp appears to still use precompiled headers. However,
the command line shows that /Y- is added and overrides it.

Additional Information: 
This only appears to affect how the project appears in the IDE.

/Y- is not listed in cmVS10CLFlagTable.h like /Yc and /Yu are. The option for
"Not Using Precompiled Headers" is "", which in this case may not be sufficient.
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Issue History 
Date Modified    Username       Field                    Change               
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2011-02-18 13:22 Brad Town      New Issue                                    
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