Windows|Cygwin: Post-build step to copy dependencies

doomsday/CMakeLists.txt

@@ -13,3 +13,5 @@ if (NOT IOS)
         add_subdirectory (tools)
     endif ()
 endif ()
+
+add_subdirectory (post)

doomsday/build/scripts/cygwin_deps.py

@@ -10,7 +10,9 @@
     raise Exception('Please run under cygwin')
 system_bin = '/bin'
 objdump_cmd = '/bin/objdump'
-root = os.path.join(sys.argv[1])
+root = os.path.abspath(sys.argv[1])
+if root.startswith('/usr'):
+    print('cygwin_deps.py will not copy system libraries to a destination under /usr')
 binaries = set(filter(lambda n: os.path.splitext(n)[1].lower() in ['.exe', '.dll'],
                       os.listdir(root)))
 while binaries:

doomsday/post/CMakeLists.txt

@@ -0,0 +1,22 @@
+# Doomsday Engine - Post-build operations
+
+cmake_minimum_required (VERSION 3.1)
+include (../cmake/Config.cmake)
+
+# Deployment of system libraries
+if (DE_ENABLE_DEPLOYMENT)
+    if (CYGWIN)
+        set (scriptName "cygwin_deps.py")
+    else ()
+        set (scriptName)
+    endif ()
+    if (scriptName)
+        install (CODE "
+            message (STATUS \"Copying dependencies...\")
+            execute_process (
+                COMMAND ${PYTHON_EXECUTABLE} ${DE_SOURCE_DIR}/build/scripts/${scriptName}
+                    ${CMAKE_INSTALL_PREFIX}/bin
+                OUTPUT_QUIET
+            )")
+    endif ()
+endif ()