diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab5de8875..a8495a0cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,6 +103,25 @@ IF ( NO_EXPORT )
 ENDIF( NO_EXPORT )
 
 
+SET ( ASSIMP_BUILD_ARCHITECTURE "" CACHE STRING 
+	"describe the current architecture."
+)
+IF    ( ASSIMP_BUILD_ARCHITECTURE STREQUAL "")
+ELSE  ( ASSIMP_BUILD_ARCHITECTURE STREQUAL "")
+	ADD_DEFINITIONS ( -D'ASSIMP_BUILD_ARCHITECTURE="${ASSIMP_BUILD_ARCHITECTURE}"' )
+ENDIF ( ASSIMP_BUILD_ARCHITECTURE STREQUAL "")
+
+SET ( ASSIMP_BUILD_COMPILER "" CACHE STRING 
+	"describe the current compiler."
+)
+IF    ( ASSIMP_BUILD_COMPILER STREQUAL "")
+ELSE  ( ASSIMP_BUILD_COMPILER STREQUAL "")
+	ADD_DEFINITIONS ( -D'ASSIMP_BUILD_COMPILER="${ASSIMP_BUILD_COMPILER}"' )
+ENDIF ( ASSIMP_BUILD_COMPILER STREQUAL "")
+
+MARK_AS_ADVANCED ( ASSIMP_BUILD_ARCHITECTURE ASSIMP_BUILD_COMPILER )
+
+
 ADD_SUBDIRECTORY( code/ )
 SET ( BUILD_ASSIMP_TOOLS ON CACHE BOOL
 	"If the supplementary tools for Assimp are built in addition to the library."