From 170427bba1b82d71c45526d34a810331a82c39fd Mon Sep 17 00:00:00 2001
From: Wilson Snyder <wsnyder@wsnyder.org>
Date: Wed, 26 Mar 2008 14:53:53 +0000
Subject: [PATCH] Fix r1010; bad prefix default

git-svn-id: file://localhost/svn/verilator/trunk/verilator@1011 77ca24e4-aefa-0310-84f0-b9a241c72d87
---
 src/V3Options.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/V3Options.cpp b/src/V3Options.cpp
index 5f30e9cf8..e5fcf30e1 100644
--- a/src/V3Options.cpp
+++ b/src/V3Options.cpp
@@ -429,7 +429,7 @@ void V3Options::parseOpts (FileLine* fl, int argc, char** argv) {
     }
 
     // Default prefix to the filename
-    if (prefix()=="") m_prefix = string("V")+topModule();
+    if (prefix()=="" && topModule()!="") m_prefix = string("V")+topModule();
     if (prefix()=="") m_prefix = string("V")+filenameNonExt(*(vFiles().begin()));
     if (modPrefix()=="") m_modPrefix = prefix();