Implement the MoreHelp utility that calls a function to printmore help information if the MoreHelp global is not null.
llvm-svn: 17774
diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index 90afa0d..ad82c84 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -834,6 +834,12 @@
//===----------------------------------------------------------------------===//
// --help and --help-hidden option implementation
//
+
+// If this variable is set, it is a pointer to a function that the user wants
+// us to call after we print out the help info. Basically a hook to allow
+// additional help to be printed.
+void (*cl::MoreHelp)() = 0;
+
namespace {
class HelpPrinter {
@@ -907,6 +913,10 @@
for (unsigned i = 0, e = Options.size(); i != e; ++i)
Options[i].second->printOptionInfo(MaxArgLen);
+ // Call the user's hook so help output can be extended.
+ if (MoreHelp != 0)
+ (*MoreHelp)();
+
// Halt the program if help information is printed
exit(1);
}