From e0d6ae268e803f46185df5d0152a44b0b73c606f Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Thu, 14 May 2009 14:47:17 +0000
Subject: CMake will parse the Boost version from boost/version.hpp

[SVN r52993]
---
 CMakeLists.txt | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 191a6fde9d..684c799833 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,10 +30,21 @@ project(Boost)
 ##########################################################################
 # Version information                                                    #
 ##########################################################################
-set(BOOST_VERSION_MAJOR 1)
-set(BOOST_VERSION_MINOR 40)
-set(BOOST_VERSION_SUBMINOR 0)
-set(BOOST_VERSION "${BOOST_VERSION_MAJOR}.${BOOST_VERSION_MINOR}.${BOOST_VERSION_SUBMINOR}")
+
+# We parse the version information from the boost/version.hpp header.
+file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/boost/version.hpp BOOST_VERSIONSTR
+  REGEX "#define[ ]+BOOST_VERSION[ ]+[0-9]+")
+string(REGEX MATCH "[0-9]+" BOOST_VERSIONSTR ${BOOST_VERSIONSTR})
+if (BOOST_VERSIONSTR)
+  math(EXPR BOOST_VERSION_MAJOR "${BOOST_VERSIONSTR} / 100000")
+  math(EXPR BOOST_VERSION_MINOR "${BOOST_VERSIONSTR} / 100 % 1000")
+  math(EXPR BOOST_VERSION_SUBMINOR "${BOOST_VERSIONSTR} % 100")
+  set(BOOST_VERSION "${BOOST_VERSION_MAJOR}.${BOOST_VERSION_MINOR}.${BOOST_VERSION_SUBMINOR}")
+  message(STATUS "Boost version ${BOOST_VERSION}")
+else()
+  message(FATAL_ERROR 
+    "Unable to parse Boost version from ${CMAKE_CURRENT_SOURCE_DIR}/boost/version.hpp")
+endif()
 ##########################################################################
 
 # Put the libaries and binaries that get built into directories at the
-- 
cgit v1.2.1