Fixing many problems related to GRE libs versioning. r=ssu sr=me a=dveditz

xpcom/glue/standalone/nsGREDirServiceProvider.cpp

@@ -121,18 +121,14 @@ nsGREDirServiceProvider::GetGREDirectoryPath()
 {
   char *pGreLocation = nsnull;
   
-#ifndef XP_UNIX
-  // If there exists a file named ".gre.conf" in the current working directory,
+  // If the xpcom library exists in the current working directory,
   // then we will not use any GRE.  The assumption here is that the GRE is in the
   // same directory as the executable.
 
-  // we only do this on non-unix platforms per blizzard.  
   struct stat configStat;
-  if (stat(".gre.config", &configStat) != -1)
+  if (stat(XPCOM_DLL, &configStat) != -1)
     return nsnull;
-#endif
 
-  // if USE_LOCAL_GRE is set, we just fall back on using no gre or rather,
   // the Gecko bits that sit next to the application or in the LD_LIBRARY_PATH
   if (PR_GetEnv("USE_LOCAL_GRE"))
     return nsnull;