Added PACKAGE_MODE option

1. Allow to build against miniupnpc dynamically
2. Use dynamic boost libraries
3. Make optimization CFLAGS optional

CMakeLists.txt

@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.0)
 
 project(Sunshine)
 
+option(PACKAGE_MODE "Use external dependencies when possible" OFF)
+
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
 if(WIN32)
@@ -14,16 +16,24 @@ endif()
 add_subdirectory(third-party/moonlight-common-c/enet)
 add_subdirectory(third-party/Simple-Web-Server)
 
-set(UPNPC_BUILD_SHARED OFF CACHE BOOL "no shared libraries")
-set(UPNPC_BUILD_TESTS OFF CACHE BOOL "Don't build tests for miniupnpc")
-set(UPNPC_BUILD_SAMPLE OFF CACHE BOOL "Don't build samples for miniupnpc")
-set(UPNPC_NO_INSTALL ON CACHE BOOL "Don't install any libraries build for miniupnpc")
-add_subdirectory(third-party/miniupnp/miniupnpc)
-include_directories(third-party/miniupnp)
+if(NOT PACKAGE_MODE)
+	set(UPNPC_BUILD_SHARED OFF CACHE BOOL "no shared libraries")
+	set(UPNPC_BUILD_TESTS OFF CACHE BOOL "Don't build tests for miniupnpc")
+	set(UPNPC_BUILD_SAMPLE OFF CACHE BOOL "Don't build samples for miniupnpc")
+	set(UPNPC_NO_INSTALL ON CACHE BOOL "Don't install any libraries build for miniupnpc")
+	add_subdirectory(third-party/miniupnp/miniupnpc)
+	include_directories(third-party/miniupnp)
+else(NOT PACKAGE_MODE)
+	find_library(MINIUPNPC miniupnpc REQUIRED)
+	message(STATUS "Found miniupnpc: ${MINIUPNPC}")
+endif(NOT PACKAGE_MODE)
 
 find_package(Threads REQUIRED)
 find_package(OpenSSL REQUIRED)
-set(Boost_USE_STATIC_LIBS ON)
+
+if(NOT PACKAGE_MODE)
+	set(Boost_USE_STATIC_LIBS ON)
+endif(NOT PACKAGE_MODE)
 find_package(Boost COMPONENTS log filesystem REQUIRED)
 
 list(APPEND SUNSHINE_COMPILE_OPTIONS -Wall -Wno-missing-braces -Wno-maybe-uninitialized -Wno-sign-compare)
@@ -327,7 +337,9 @@ if("${BUILD_TYPE}" STREQUAL "XDEBUG")
 	endif()
 else()
 	add_definitions(-DNDEBUG)
-	list(APPEND SUNSHINE_COMPILE_OPTIONS -O3)
+	if(NOT PACKAGE_MODE)
+		list(APPEND SUNSHINE_COMPILE_OPTIONS -O3)
+	endif(NOT PACKAGE_MODE)
 endif()
 
 if(NOT SUNSHINE_ASSETS_DIR)
@@ -346,7 +358,6 @@ list(APPEND CBS_EXTERNAL_LIBRARIES
 	cbs)
 
 list(APPEND SUNSHINE_EXTERNAL_LIBRARIES
-		libminiupnpc-static
 		${CBS_EXTERNAL_LIBRARIES}
 		${CMAKE_THREAD_LIBS_INIT}
 		stdc++fs
@@ -357,6 +368,14 @@ list(APPEND SUNSHINE_EXTERNAL_LIBRARIES
 		${OPENSSL_LIBRARIES}
 		${PLATFORM_LIBRARIES})
 
+if(NOT PACKAGE_MODE)
+	list(APPEND SUNSHINE_EXTERNAL_LIBRARIES
+		libminiupnpc-static)
+else(NOT PACKAGE_MODE)
+	list(APPEND SUNSHINE_EXTERNAL_LIBRARIES
+		${MINIUPNPC})
+endif(NOT PACKAGE_MODE)
+
 if (NOT WIN32)
 	list(APPEND SUNSHINE_EXTERNAL_LIBRARIES Boost::log)
 endif()