CMake: Detect libcurl and use it when found

Move ID_ENABLE_CURL to config.h

CMakeLists.txt

@@ -31,7 +31,6 @@ option(GAME			"Build the base game code" ON)
 option(D3XP			"Build the d3xp game code" OFF)
 option(DEDICATED	"Build the dedicated server" OFF)
 option(X86			"Cross compile for x86 (only applicable on x86_64)" OFF)
-option(CURL			"Enable usage of libcurl for http/ftp downloads" OFF)
 option(ONATIVE		"Optimize for the host CPU" OFF)
 
 if (NOT CMAKE_SYSTEM_PROCESSOR)
@@ -108,12 +107,13 @@ include_directories(${OPENGL_INCLUDE_DIR})
 find_package(SDL REQUIRED)
 include_directories(${SDL_INCLUDE_DIR})
 
-if (CURL)
-	find_package(CURL REQUIRED)
-	add_definitions(-DID_ENABLE_CURL=1)
+find_package(CURL QUIET)
+if (CURL_FOUND)
+	set(ID_ENABLE_CURL ON)
 	include_directories(${CURL_INCLUDE_DIR})
 else()
-	add_definitions(-DID_ENABLE_CURL=0)
+	message(STATUS "libcurl not found, server downloads won't be available")
+	set(ID_ENABLE_CURL OFF)
 endif()
 
 # compiler specific flags

config.h.in

@@ -3,4 +3,6 @@
 
 #cmakedefine HAVE_JPEG_MEM_SRC
 
+#cmakedefine ID_ENABLE_CURL
+
 #endif

framework/BuildDefines.h

@@ -60,10 +60,6 @@ If you have questions concerning this license or the applicable additional terms
 	#define ID_ALLOW_CHEATS 0
 #endif
 
-#ifndef ID_ENABLE_CURL
-	#define ID_ENABLE_CURL 1
-#endif
-
 // fake a pure client. useful to connect an all-debug client to a server
 #ifndef ID_FAKE_PURE
 	#define ID_FAKE_PURE 0