Index: clang/test/Analysis/scan-build/cxx-name.test
===================================================================
--- /dev/null
+++ clang/test/Analysis/scan-build/cxx-name.test
@@ -0,0 +1,9 @@
+REQUIRES: shell
+
+RUN: %scan-build sh -c 'echo "CLANG_CXX=/$(basename "$CLANG_CXX")/"' | FileCheck %s
+
+Check that scan-build sets the CLANG_CXX environment variable (meant to be
+consumed by ccc-analyzer) to an appropriate pathname for the clang++ executable,
+derived from the pathname of the clang executable:
+
+CHECK: CLANG_CXX=/clang++{{(\.exe)?}}/
Index: clang/test/Analysis/scan-build/lit.local.cfg
===================================================================
--- clang/test/Analysis/scan-build/lit.local.cfg
+++ clang/test/Analysis/scan-build/lit.local.cfg
@@ -15,4 +15,4 @@
                                                     'tools',
                                                     'scan-build',
                                                     'bin')),
-                                 config.clang)))
+                                 os.path.realpath(config.clang))))
Index: clang/tools/scan-build/bin/scan-build
===================================================================
--- clang/tools/scan-build/bin/scan-build
+++ clang/tools/scan-build/bin/scan-build
@@ -1925,7 +1925,7 @@
     $ClangCXX =~ s/.exe$/++.exe/;
   }
   else {
-    $ClangCXX =~ s/\-\d+\.\d+$//;
+    $ClangCXX =~ s/\-\d+(\.\d+)?$//;
     $ClangCXX .= "++";
   }
 }