Fix my dll making, also other cmake variable use

src/CMakeLists.txt

@@ -3,17 +3,28 @@ include_directories(${PROJECT_SOURCE_DIR}/include)
 option(ENABLE_IO_THREAD "Start up a separate I/O thread, otherwise I'd need to call an update function" ON)
 option(BUILD_DYNAMIC_LIB "Build library as a DLL" OFF)
 
-if (${ENABLE_IO_THREAD} EQUAL OFF)
+if (NOT ${ENABLE_IO_THREAD})
     add_definitions(-DDISCORD_DISABLE_IO_THREAD)
-endif (${ENABLE_IO_THREAD} EQUAL OFF)
+endif (NOT ${ENABLE_IO_THREAD})
 
-if (${BUILD_DYNAMIC_LIB} EQUAL ON)
-    set(RPC_LIBRARY_TYPE DYNAMIC)
-else(${BUILD_DYNAMIC_LIB} EQUAL ON)
+set(BASE_RPC_SRC
+    ${PROJECT_SOURCE_DIR}/include/discord-rpc.h
+    discord-rpc.cpp
+    discord-register.cpp
+    rpc_connection.h
+    rpc_connection.cpp
+    serialization.h
+    serialization.cpp
+    connection.h
+    backoff.h
+)
+
+if (${BUILD_DYNAMIC_LIB})
+    set(RPC_LIBRARY_TYPE SHARED)
+    set(BASE_RPC_SRC ${BASE_RPC_SRC} dllmain.cpp)
+else(${BUILD_DYNAMIC_LIB})
     set(RPC_LIBRARY_TYPE STATIC)
-endif(${BUILD_DYNAMIC_LIB} EQUAL ON)
-
-set(BASE_RPC_SRC ${PROJECT_SOURCE_DIR}/include/discord-rpc.h discord-rpc.cpp discord-register.cpp rpc_connection.h rpc_connection.cpp serialization.h serialization.cpp connection.h backoff.h)
+endif(${BUILD_DYNAMIC_LIB})
 
 if(WIN32)
     add_library(discord-rpc ${RPC_LIBRARY_TYPE} ${BASE_RPC_SRC} connection_win.cpp)
@@ -28,10 +39,10 @@ endif(UNIX)
 
 target_include_directories(discord-rpc PRIVATE ${RAPIDJSON}/include)
 
-if (${BUILD_DYNAMIC_LIB} EQUAL ON)
+if (${BUILD_DYNAMIC_LIB})
     target_compile_definitions(discord-rpc PUBLIC -DDISCORD_DYNAMIC_LIB)
     target_compile_definitions(discord-rpc PRIVATE -DDISCORD_BUILDING_SDK)
-endif(${BUILD_DYNAMIC_LIB} EQUAL ON)
+endif(${BUILD_DYNAMIC_LIB})
 
 add_dependencies(discord-rpc clangformat)
 

src/dllmain.cpp

@@ -0,0 +1,6 @@
+#include <windows.h>
+
+BOOL WINAPI DllMain(HMODULE, DWORD, LPVOID)
+{
+    return TRUE;
+}