cmake: Add SRB2_CONFIG_DEV_BUILD

src/CMakeLists.txt

@@ -37,6 +37,8 @@ set(SRB2_CONFIG_YASM OFF CACHE BOOL
 	"Use YASM in place of NASM.")
 set(SRB2_CONFIG_STATIC_OPENGL OFF CACHE BOOL
 	"Use statically linked OpenGL. NOT RECOMMENDED.")
+set(SRB2_CONFIG_DEV_BUILD OFF CACHE BOOL
+	"Compile a development build of SRB2.")
 
 ### use internal libraries?
 if(${CMAKE_SYSTEM} MATCHES "Windows") ###set on Windows only
@@ -255,6 +257,10 @@ endif()
 
 set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} -Wno-trigraphs)
 
+if(${SRB2_CONFIG_DEV_BUILD})
+	target_compile_definitions(SRB2SDL2 PRIVATE -DDEVELOP)
+endif()
+
 target_compile_definitions(SRB2SDL2 PRIVATE -DCMAKECONFIG)
 
 #add_library(SRB2Core STATIC