Fixed the CMakeLists.txt to have correct default values for CMAKE_OSX…

…_SYSROOT, also changed the minimum CMAKE version required

CMakeLists.txt

@@ -1,7 +1,7 @@
 ################################################################################
 # Initial setup
 ################################################################################
-CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8.8)
 
 IF(COMMAND cmake_policy)
     CMAKE_POLICY(SET CMP0003 NEW)
@@ -18,25 +18,20 @@ SET(CMAKE_FIND_LIBRARY_SUFFIXES ".lib")
 IF(APPLE)
     # Setup default values
     IF(NOT HAVE_CACHED_VALUES)
-        IF(EXISTS /Developer/SDKs/MacOSX10.6.sdk)
-	    SET(CMAKE_OSX_ARCHITECTURES "i386" CACHE STRING "Build architectures for OSX" FORCE)
-            SET(CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.6.sdk" CACHE FILEPATH "isysroot used for universal binary support" FORCE)
-	ELSE()
-            IF(EXISTS /Developer/SDKs/MacOSX10.5.sdk)
-                SET(CMAKE_OSX_ARCHITECTURES "ppc;i386" CACHE STRING "Build architectures for OSX" FORCE)
-                SET(CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.5.sdk" CACHE FILEPATH "isysroot used for universal binary support" FORCE)
-            ELSE()
-                IF(EXISTS /Developer/SDKs/MacOSX10.4u.sdk)
-                    SET(CMAKE_OSX_ARCHITECTURES "ppc;i386" CACHE STRING "Build architectures for OSX" FORCE)
-                    SET(CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.4u.sdk" CACHE FILEPATH "isysroot used for universal binary support" FORCE)
-                ELSE()
-                    MESSAGE(FATAL_ERROR "No supported SDK could be found!")
-                ENDIF(EXISTS /Developer/SDKs/MacOSX10.4u.sdk)
-            ENDIF(EXISTS /Developer/SDKs/MacOSX10.5.sdk)
-        ENDIF(EXISTS /Developer/SDKs/MacOSX10.6.sdk)
-    ENDIF(NOT HAVE_CACHED_VALUES)
 
-    # Target Tiger
+        IF(EXISTS ${CMAKE_OSX_SYSROOT})
+            SET(CMAKE_OSX_SYSROOT ${CMAKE_OSX_SYSROOT} CACHE FILEPATH "isysroot used for universal binary support" FORCE)
+        ENDIF(EXISTS ${CMAKE_OSX_SYSROOT})
+
+        IF(NOT ${CMAKE_OSX_ARCHITECTURES} STREQUAL "")
+	    SET(CMAKE_OSX_ARCHITECTURES ${CMAKE_OSX_ARCHITECTURES} CACHE STRING "Build architectures for OSX" FORCE)
+        ELSE()
+	    SET(CMAKE_OSX_ARCHITECTURES "ppc;i386" CACHE STRING "Build architectures for OSX" FORCE)
+        ENDIF(NOT ${CMAKE_OSX_ARCHITECTURES} STREQUAL "") 
+
+    ENDIF(NOT HAVE_CACHED_VALUES)
+
+   # Target Tiger
     SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.4")
 ENDIF(APPLE)