Issue a #error if the host doesn't have an implementation for

GetMainExecutable yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113240 91177308-0d34-0410-b5e6-96231b3b80d8

lib/System/Unix/Path.inc

@@ -372,6 +372,8 @@ Path Path::GetMainExecutable(const char *argv0, void *MainAddr) {
   char link_path[MAXPATHLEN];
   if (realpath(DLInfo.dli_fname, link_path))
     return Path(std::string(link_path));
+#else
+#error GetMainExecutable is not implemented on this host yet.
 #endif
   return Path();
 }