Add an extension point to the CommandLine library where clients can

register extra version information to be printed. This is designed to
allow those tools which link in various targets to also print those
registered targets under --version.

Currently this printing logic is embedded into the Support library
directly; a huge layering violation. This is the first step to hoisting
it out into the tools without adding lots of duplicated code.

llvm-svn: 135755

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/include/llvm/Support/CommandLine.h b/llvm/include/llvm/Support/CommandLine.h
index d6098711a07..ba8fbee94fd 100644
--- a/llvm/include/llvm/Support/CommandLine.h
+++ b/llvm/include/llvm/Support/CommandLine.h
@@ -59,6 +59,15 @@ void ParseEnvironmentOptions(const char *progName, const char *envvar,
 ///                     CommandLine utilities to print their own version string.
 void SetVersionPrinter(void (*func)());
 
+///===---------------------------------------------------------------------===//
+/// AddExtraVersionPrinter - Add an extra printer to use in addition to the
+///                          default one. This can be called multiple times,
+///                          and each time it adds a new function to the list
+///                          which will be called after the basic LLVM version
+///                          printing is complete. Each can then add additional
+///                          information specific to the tool.
+void AddExtraVersionPrinter(void (*func)());
+
 
 // PrintOptionValues - Print option values.
 // With -print-options print the difference between option values and defaults.