Add the demo for good order

CMakeLists.txt

@@ -8,6 +8,7 @@ add_compile_options(-Wall -Wextra -Werror)
 
 option(WINDOWS "Whether the build target is Windows or not." OFF)
 option(SHARED "Whether we should build a shared library, instead of a static one." OFF)
+option(DEMO "Whether or not the demo should be built." OFF)
 
 if (NOT WINDOWS)
     set(CMAKE_POSITION_INDEPENDENT_CODE ON)
@@ -44,3 +45,9 @@ if (STATICC)
     set(LINKS -static-libgcc -static-libstdc++ -Wl,-Bstatic -lm -lstdc++ -lpthread -Wl,-Bdynamic ${LINKS})
 endif(STATICC)
 target_link_libraries(atomorph ${LINKS})
+
+if (DEMO)
+    file(GLOB_RECURSE DEMO_SRC_FILES "demo/*.cpp")
+    add_executable(atomorph_demo ${DEMO_SRC_FILES})
+    target_link_libraries(atomorph_demo atomorph -lpthread)
+endif()

demo/main.cpp

@@ -8,6 +8,7 @@
 
 #include "main.h"
 #include "lodepng.h"
+#include "../src/atomorph.h"
 
 MORPH_OPTIONS options;
 

demo/main.h

@@ -3,7 +3,7 @@
  * See Copyright Notice at the end of this file.
  */
 
-#include "../atomorph.h"
+#include "../src/atomorph.h"
 #include "options.h"
 
 bool init        (int argc, char **argv);