CROWN_ARCH cmake var implemented

BUILD.txt

@@ -5,10 +5,12 @@ Type these commands in the root directory (i.e. the same as this file):
 
 1. $ mkdir build
 2. $ cd build
-3. $ cmake .. -DCMAKE_INSTALL_PREFIX=$HOME/your/install/directory
+3. $ cmake .. -DCMAKE_INSTALL_PREFIX=$HOME/your/install/directory -DCROWN_ARCH="..."
 4. $ make
 5. $ make install
 
+N.B: CROWN_ARCH valid values right now: "x86", "x86_64"
+
 //-----------------------------------------------------------------------------
 In order to select different build configurations you have to do the following:
 

CMakeLists.txt

@@ -33,7 +33,7 @@ set (INCLUDES
 )
 
 include_directories(${INCLUDES})
-add_definitions(-pipe -ansi -W -Wall -Wextra -Wno-long-long -pedantic -fPIC -g -pg)
+add_definitions(-pipe -ansi -W -Wall -Wextra -Wno-long-long -pedantic -fPIC -g -pg -llua)
 
 # detect operating system
 if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
@@ -69,5 +69,14 @@ if (CROWN_BUILD_TESTS)
 	add_subdirectory(tests)
 endif (CROWN_BUILD_TESTS)
 
+#detect architecture
+if (CROWN_ARCH MATCHES "x86")
+	add_subdirectory(third/x86);
+endif (CROWN_ARCH MATCHES "x86")
+
+if (CROWN_ARCH MATCHES "x86_64")
+	add_subdirectory(third/x86_64)
+endif (CROWN_ARCH MATCHES "x86_64")
+
 #add_subdirectory(third/luajit)