[LLVMbugs] [Bug 17895] New: Clang-Cl doesn't handle /Yc Precompiled Header flag on VS2010

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17895

            Bug ID: 17895
           Summary: Clang-Cl doesn't handle /Yc Precompiled Header flag on
                    VS2010
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Driver
          Assignee: unassignedclangbugs at nondot.org
          Reporter: samuel.dowling at nikon.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

1)Install LLVM SVN r194000 with VS2010 SP1 Windows 7. 
2)Change platform toolset to 'LLVM-vs2010' on a project which uses precompiled
headers. 
3)Attempt to build the project fails with 

1>clang cl.exe : error : no such file or directory: '/Ycstdafx.h'

/Yu may not work either but I cannot proceed to find out.

I don't know if this is related to this issue but even though /fallback is
specified under Command Line > Additional Options clang does not seem to fall
back to using cl.exe on this error.

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