Make it possible to override the standard version printer. Not all tools

built with CommandLine.h will want the --version option to report that the
tool belongs to LLVM. To override simply pass a void func() to the
cl::SetVersionPrinter() function and that void func() will be called when
it is time to print the version information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28687 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/CommandLine.h

@@ -48,6 +48,13 @@ void ParseCommandLineOptions(int &argc, char **argv,
 void ParseEnvironmentOptions(const char *progName, const char *envvar,
                              const char *Overview = 0);
 
+///===---------------------------------------------------------------------===//
+/// SetVersionPrinter - Override the default (LLVM specific) version printer
+///                     used to print out the version when --version is given
+///                     on the command line. This gives other systems using the
+///                     CommandLine utilities to print their own version string.
+void SetVersionPrinter(void (*func)());
+
 //===----------------------------------------------------------------------===//
 // Flags permitted to be passed to command line arguments
 //