From b207d4498999194e577b53819ec6c93156c62885 Mon Sep 17 00:00:00 2001
From: Slava Pestov <slava@shill.internal.stack-effects.com>
Date: Tue, 5 May 2009 14:36:15 -0500
Subject: [PATCH] Update README.txt for new compilation dependencies

---
 README.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/README.txt b/README.txt
index 54d53b090a..a33a85b218 100755
--- a/README.txt
+++ b/README.txt
@@ -23,8 +23,9 @@ implementation. It is not an introduction to the language itself.
 Factor supports various platforms. For an up-to-date list, see
 <http://factorcode.org>.
 
-The Factor VM is written in C++ and uses the GNU and TR1 extensions.
-As a result, it requires GCC 4.x to compile.
+The Factor VM is written in C++ and uses GNU extensions. When compiling
+with GCC 3.x, boost::unordered_map must be installed. On GCC 4.x, Factor
+uses std::tr1::unordered_map which is shipped as part of GCC.
 
 Run 'make' ('gmake' on *BSD) with no parameters to build the Factor VM.