llvmc: Make ExecuteProgram() look in the driver directory first.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117584 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CompilerDriver/Action.cpp b/lib/CompilerDriver/Action.cpp
index 0be8049..3503bd3 100644
--- a/lib/CompilerDriver/Action.cpp
+++ b/lib/CompilerDriver/Action.cpp
@@ -14,6 +14,7 @@
 #include "llvm/CompilerDriver/Action.h"
 #include "llvm/CompilerDriver/BuiltinOptions.h"
 #include "llvm/CompilerDriver/Error.h"
+#include "llvm/CompilerDriver/Main.h"
 
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/SystemUtils.h"
@@ -28,7 +29,6 @@
 
 namespace llvmc {
 
-extern int Main(int argc, char** argv);
 extern const char* ProgramName;
 
 }
@@ -55,10 +55,13 @@
 
   int ExecuteProgram (const std::string& name,
                       const StrVector& args) {
-    sys::Path prog = sys::Program::FindProgramByName(name);
+    sys::Path prog(name);
+
+    if (!prog.isAbsolute())
+      prog = FindExecutable(name, ProgramName, (void *)(intptr_t)&Main);
 
     if (prog.isEmpty()) {
-      prog = FindExecutable(name, ProgramName, (void *)(intptr_t)&Main);
+      prog = sys::Program::FindProgramByName(name);
       if (prog.isEmpty()) {
         PrintError("Can't find program '" + name + "'");
         return -1;