Use different add_definitions for ENABLE_MONOLITHIC_INSTALL

CMakeLists.txt

@@ -390,22 +390,27 @@ else()
 		set(BIN_DIR "." CACHE STRING "Where to install binaries")
 		set(LIB_DIR "." CACHE STRING "Where to install main library")
 		set(DATA_DIR "." CACHE STRING "Where to install data files")
+
+		# following constants only used for platforms using XDG (Linux, BSD, etc)
+		add_definitions(-DM_DATA_DIR="${DATA_DIR}")
+		add_definitions(-DM_BIN_DIR="${BIN_DIR}")
+		add_definitions(-DM_LIB_DIR="${LIB_DIR}")
 	else()
 		if(NOT BIN_DIR)
-			set(BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE STRING "Where to install binaries")
+			set(BIN_DIR "bin" CACHE STRING "Where to install binaries")
 		endif()
 		if(NOT LIB_DIR)
-			set(LIB_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/vcmi" CACHE STRING "Where to install main library")
+			set(LIB_DIR "${CMAKE_INSTALL_LIBDIR}/vcmi" CACHE STRING "Where to install main library")
 		endif()
 		if(NOT DATA_DIR)
-			set(DATA_DIR "${CMAKE_INSTALL_PREFIX}/share/vcmi" CACHE STRING "Where to install data files")
+			set(DATA_DIR "share/vcmi" CACHE STRING "Where to install data files")
 		endif()
-	endif()
 
-	# following constants only used for platforms using XDG (Linux, BSD, etc)
-	add_definitions(-DM_DATA_DIR="${DATA_DIR}")
-	add_definitions(-DM_BIN_DIR="${BIN_DIR}")
-	add_definitions(-DM_LIB_DIR="${LIB_DIR}")
+		# following constants only used for platforms using XDG (Linux, BSD, etc)
+		add_definitions(-DM_DATA_DIR="${CMAKE_INSTALL_PREFIX}/${DATA_DIR}")
+		add_definitions(-DM_BIN_DIR="${CMAKE_INSTALL_PREFIX}/${BIN_DIR}")
+		add_definitions(-DM_LIB_DIR="${CMAKE_INSTALL_PREFIX}/${LIB_DIR}")
+	endif()
 endif()
 
 # iOS has flat libs directory structure