[LLVMbugs] [Bug 17257] New: VS2012 integration Platform Toolset needs to disable SAFESEH linking

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17257

            Bug ID: 17257
           Summary: VS2012 integration Platform Toolset needs to disable
                    SAFESEH linking
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: other
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: p_hampson at wargaming.net
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Clang apparently doesn't produce objects usable with the SAFESEH flag enabled
(See https://code.google.com/p/chromium/issues/detail?id=82385#c65) and
VS2012's Microsoft.Cpp.Win32.Common.props sets "ImageHasSafeExceptionHandlers"
to true unless debug libraries are being linked and it is not already set.

This can be fixed by adding the following to
Microsoft.Cpp.Win32.LLVM-vs2012.props:

  <ItemDefinitionGroup>
    <Link>
      <ImageHasSafeExceptionHandlers>false</ImageHasSafeExceptionHandlers>
    </Link>
  </ItemDefinitionGroup>

This issue causes CMake's Visual Studio Project generator's compiler-detection
to fail to recognise Clang under VS2012 as there's no way to override the
default SAFESEH value at that stage in CMake's process (as far as I can see).

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