MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0014009CMakeCMakepublic2013-03-13 11:252016-06-10 14:31
ReporterBraden McDaniel 
Assigned ToKitware Robot 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionmoved 
Platformx86OSWindowsOS VersionXP
Product VersionCMake 2.8.10.2 
Target VersionFixed in Version 
Summary0014009: /LTCG option does not cause LinkTimeCodeGeneration to be set in project file
DescriptionAdding the /LTCG linker option to LINK_FLAGS or STATIC_LIBRARY_FLAGS should cause LinkTimeCodeGeneration to be set in the project file. For instance:

  <Tool Name="VCLinkerTool" ... LinkTimeCodeGeneration="1" />

This flag has the following forms that correspond to values 1-4 for the LinkTimeCodeGeneration attribute:

  Option XML Attribute Value
  ---------------------------------------
  /LTCG 1
  /LTCG:PGINSTRUMENT 2
  /LTCG:PGOPTIMIZE 3
  /LTCG:PGUPDATE 4


See: http://msdn.microsoft.com/en-us/library/xbf3tbeh.aspx [^]
Steps To ReproduceAdd /LTCG to the linker (or librarian) using:

  foreach(CONFIG _RELEASE _MINSIZEREL _RELWITHDEBINFO)
    set_property(TARGET foo APPEND PROPERTY LINK_FLAGS${CONFIG} "/LTCG")
  endforeach()


  foreach(CONFIG _RELEASE _MINSIZEREL _RELWITHDEBINFO)
    set_property(TARGET bar APPEND PROPERTY STATIC_LIBRARY_FLAGS${CONFIG} "/LTCG")
  endforeach()

Generate a Visual Studio project file.
Additional InformationI'm observing this on Visual Studio 2008. This bug is similar to bug 0010263; though that bug dealt with the compiler option and this one is about the related linker option.
TagsNo tags attached.
Relationships
related to 0010263closed David Cole /GL flag for Visual Studio 7 does not cause "WholeProgramOptimization" to be set in project file (i.e. GUI) 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2013-03-13 11:25Braden McDanielNew Issue
2013-03-13 11:35Brad KingRelationship addedrelated to 0010263
2013-03-13 11:39Brad KingNote Added: 0032601
2016-06-10 14:28Kitware RobotNote Added: 0042247
2016-06-10 14:28Kitware RobotStatusnew => resolved
2016-06-10 14:28Kitware RobotResolutionopen => moved
2016-06-10 14:28Kitware RobotAssigned To => Kitware Robot
2016-06-10 14:31Kitware RobotStatusresolved => closed

Notes
(0032601)
Brad King   
2013-03-13 11:39   
For VS >= 10 we generate the flag mappings from MSBuild rule files, but for VS <= 9 we have to hand-code the table. Try this patch which backports the VS 10 table entries (untested):

diff --git a/Source/cmLocalVisualStudio7Generator.cxx b/Source/cmLocalVisualStudio7Generator.cxx
index dfe8280..1872d60 100644
--- a/Source/cmLocalVisualStudio7Generator.cxx
+++ b/Source/cmLocalVisualStudio7Generator.cxx
@@ -548,6 +548,16 @@ cmVS7FlagTable cmLocalVisualStudio7GeneratorLinkFlagTable[] =
    "Image may be rebased at load-time", "2", 0},
   {"SetChecksum", "RELEASE", "Enable setting checksum in header", "true", 
0},
   {"SupportUnloadOfDelayLoadedDLL", "DELAY:UNLOAD", "", "true", 
0},
+  {"LinkTimeCodeGeneration", "",
+   "Default", "Default", 0},
+  {"LinkTimeCodeGeneration", "LTCG",
+   "Use Link Time Code Generation", "UseLinkTimeCodeGeneration", 0},
+  {"LinkTimeCodeGeneration", "LTCG:PGInstrument",
+   "Profile Guided Optimization - Instrument", "PGInstrument", 0},
+  {"LinkTimeCodeGeneration", "LTCG:PGOptimize",
+   "Profile Guided Optimization - Optimization", "PGOptimization", 0},
+  {"LinkTimeCodeGeneration", "LTCG:PGUpdate",
+   "Profile Guided Optimization - Update", "PGUpdate", 0},
   {"TargetMachine", "MACHINE:I386", "Machine x86", "1", 0},                    
   
{"TargetMachine", "MACHINE:X86", "Machine x86", "1", 0},                     
   
{"TargetMachine", "MACHINE:AM33", "Machine AM33", "2", 0},
(0042247)
Kitware Robot   
2016-06-10 14:28   
Resolving issue as `moved`.

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