Correct OptionCategoryCompare() in the command line library.

Summary:
It should return <0, 0, or >0 for less-than, equal, and greater-than like
strcmp() (according to the history, it used to be implemented with
strcmp()) but it actually returned 0, or 1 for not-equal and equal.

Reviewers: qcolombet

Reviewed By: qcolombet

Subscribers: qcolombet, llvm-commits

Differential Revision: https://reviews.llvm.org/D30996

llvm-svn: 298844

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index 65747d69291..f4a9108b854 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -1852,10 +1852,11 @@ public:
 
   // Helper function for printOptions().
   // It shall return a negative value if A's name should be lexicographically
-  // ordered before B's name. It returns a value greater equal zero otherwise.
+  // ordered before B's name. It returns a value greater than zero if B's name
+  // should be ordered before A's name, and it returns 0 otherwise.
   static int OptionCategoryCompare(OptionCategory *const *A,
                                    OptionCategory *const *B) {
-    return (*A)->getName() == (*B)->getName();
+    return (*A)->getName().compare((*B)->getName());
   }
 
   // Make sure we inherit our base class's operator=()