From b01e6efccc330e8d3e0454efb2453ea8d9c90ea5 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Sun, 8 Jan 2012 15:55:47 -0800
Subject: [PATCH] clarify recommended boost versions - closes #1001

---
 INSTALL.md | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/INSTALL.md b/INSTALL.md
index c06daa12a..0fdef238e 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -36,12 +36,16 @@ Build dependencies are:
 
 Mapnik Core depends on:
 
- * Boost >= 1.42.x (>= 1.45.x if using clang++) with these libraries:
-    - filesystem
-    - system
-    - thread (if mapnik threadsafe support is required, default on)
-    - regex (optionally built with icu regex support)
-    - program_options (optionally for mapnik command line programs)
+ * Boost
+    - >= 1.47 is recommended
+    - >= 1.45.x is required if compiling with clang++
+    - >= 1.42.x works on most systems and most compilers
+    - These libraries are required:
+      - filesystem
+      - system
+      - thread (if mapnik threadsafe support is required, default on)
+      - regex (optionally built with icu regex support)
+      - program_options (optionally for mapnik command line programs)
 
  * libicuuc >= 4.0 (ideally >= 4.2) - International Components for Unicode
  * libpng >= 1.2.x - PNG Graphics