[LLVMbugs] [Bug 19235] New: CMake build doesn't have handy "make update"

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19235

            Bug ID: 19235
           Summary: CMake build doesn't have handy "make update"
           Product: Build scripts
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: romankashicin at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 12274
  --> http://llvm.org/bugs/attachment.cgi?id=12274&action=edit
Patch for cmake build to provide "make update" functionality

It's possible to update the llvm project and all the subprojects with simple

  make update

I can't find similar functionality for the CMake build. Executing "make update"
in the root directory produces

  Makefile:44: Makefile.config: No such file or directory
  Makefile:146: /Makefile.rules: No such file or directory
  make: *** No rule to make target `/Makefile.rules'.  Stop.

Please find portable (I hope) CMake module providing exactly this functionality
attached. I've tested "make update" on CMake-generated Makefile on linux and it
works just fine for me. I have no chance to test it on Windows.

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