From 166de04854580abdc4dda3f6e48ce96dc36356b8 Mon Sep 17 00:00:00 2001
From: LaurentGom <LaurentGom@4e206d99-4929-0410-ac5d-dfc041789085>
Date: Sun, 28 Nov 2010 22:03:05 +0000
Subject: [PATCH] Added macros to define the SFML version in Config.hpp
 Improved FindSFML.cmake to check the version

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1724 4e206d99-4929-0410-ac5d-dfc041789085
---
 bindings/c/include/SFML/Config.h |  7 ++++++
 cmake/Modules/FindSFML.cmake     | 42 +++++++++++++++++++++++++++++---
 include/SFML/Config.hpp          |  7 ++++++
 3 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/bindings/c/include/SFML/Config.h b/bindings/c/include/SFML/Config.h
index db3aac78c..cfc31a9db 100644
--- a/bindings/c/include/SFML/Config.h
+++ b/bindings/c/include/SFML/Config.h
@@ -26,6 +26,13 @@
 #define SFML_CONFIG_H
 
 
+////////////////////////////////////////////////////////////
+// Define the CSFML version
+////////////////////////////////////////////////////////////
+#define CSFML_VERSION_MAJOR 2
+#define CSFML_VERSION_MINOR 0
+
+
 ////////////////////////////////////////////////////////////
 // Identify the operating system
 ////////////////////////////////////////////////////////////
diff --git a/cmake/Modules/FindSFML.cmake b/cmake/Modules/FindSFML.cmake
index c2d150ee5..4b1e6e60e 100644
--- a/cmake/Modules/FindSFML.cmake
+++ b/cmake/Modules/FindSFML.cmake
@@ -9,6 +9,9 @@
 #
 # By default, the dynamic libraries of SFML will be found. To find the static ones instead,
 # you must set the SFML_STATIC_LIBRARIES variable to TRUE before calling find_package(SFML ...).
+#
+# If SFML is not installed in a standard path, you can use the SFMLDIR CMake variable
+# to tell CMake where SFML is.
 
 # deduce the libraries suffix from the options
 set(FIND_SFML_LIB_SUFFIX "")
@@ -30,6 +33,32 @@ find_path(SFML_INCLUDE_DIR SFML/Config.hpp
           /opt/
           ${SFMLDIR})
 
+# check the version number
+set(SFML_VERSION_OK TRUE)
+if(SFML_FIND_VERSION AND SFML_INCLUDE_DIR)
+    # extract the major and minor version numbers from SFML/Config.hpp
+    FILE(READ "${SFML_INCLUDE_DIR}/SFML/Config.hpp" SFML_CONFIG_HPP_CONTENTS)
+    STRING(REGEX REPLACE ".*#define SFML_VERSION_MAJOR ([0-9]+).*" "\\1" SFML_VERSION_MAJOR "${SFML_CONFIG_HPP_CONTENTS}")
+    STRING(REGEX REPLACE ".*#define SFML_VERSION_MINOR ([0-9]+).*" "\\1" SFML_VERSION_MINOR "${SFML_CONFIG_HPP_CONTENTS}")
+    math(EXPR SFML_REQUESTED_VERSION "${SFML_FIND_VERSION_MAJOR} * 10 + ${SFML_FIND_VERSION_MINOR}")
+
+    # if we could extract them, compare with the requested version number
+    if (SFML_VERSION_MAJOR)
+        # transform version numbers to an integer
+        math(EXPR SFML_VERSION "${SFML_VERSION_MAJOR} * 10 + ${SFML_VERSION_MINOR}")
+
+        # compare them
+        if(SFML_VERSION LESS SFML_REQUESTED_VERSION)
+            set(SFML_VERSION_OK FALSE)
+        endif()
+    else()
+        # SFML version is < 2.0
+        if (SFML_REQUESTED_VERSION GREATER 19)
+            set(SFML_VERSION_OK FALSE)
+        endif()
+    endif()
+endif()
+
 # find the requested components
 set(FIND_SFML_LIB_PATHS ~/Library/Frameworks
                         /Library/Frameworks
@@ -62,7 +91,12 @@ foreach(FIND_SFML_COMPONENT ${SFML_FIND_COMPONENTS})
     set(SFML_LIBRARIES ${SFML_LIBRARIES} ${${FIND_SFML_COMPONENT_VAR}})
 endforeach()
 
-# handle the QUIETLY and REQUIRED arguments and set SFML_FOUND to TRUE if all listed variables are TRUE
-INCLUDE(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(SFML DEFAULT_MSG SFML_INCLUDE_DIR ${SFML_LIBRARIES_NAMES})
-MARK_AS_ADVANCED(SFML_INCLUDE_DIR ${SFML_LIBRARIES_NAMES})
+if(SFML_FIND_REQUIRED AND NOT SFML_VERSION_OK)
+    message(SEND_ERROR "Bad SFML version (requested: ${SFML_FIND_VERSION}, found: ${SFML_VERSION_MAJOR}.${SFML_VERSION_MINOR})")
+    set(SFML_FOUND FALSE)
+else()
+    # handle the QUIETLY and REQUIRED arguments and set SFML_FOUND to TRUE if all listed variables are TRUE
+    INCLUDE(FindPackageHandleStandardArgs)
+    FIND_PACKAGE_HANDLE_STANDARD_ARGS(SFML DEFAULT_MSG SFML_INCLUDE_DIR ${SFML_LIBRARIES_NAMES})
+    MARK_AS_ADVANCED(SFML_INCLUDE_DIR ${SFML_LIBRARIES_NAMES})
+endif()
diff --git a/include/SFML/Config.hpp b/include/SFML/Config.hpp
index 3d2ed3d18..5b628a776 100644
--- a/include/SFML/Config.hpp
+++ b/include/SFML/Config.hpp
@@ -26,6 +26,13 @@
 #define SFML_CONFIG_HPP
 
 
+////////////////////////////////////////////////////////////
+// Define the SFML version
+////////////////////////////////////////////////////////////
+#define SFML_VERSION_MAJOR 2
+#define SFML_VERSION_MINOR 0
+
+
 ////////////////////////////////////////////////////////////
 // Identify the operating system
 ////////////////////////////////////////////////////////////