move to new build system

cmake/libraries/pugixml.cmake

@@ -0,0 +1,36 @@
+if(PROJECT_ENABLE_PUGIXML)
+  if(PROJECT_BUILD)
+    find_package(pugixml ${PUGIXML_VERSION} REQUIRED)
+
+    add_definitions(-DPROJECT_ENABLE_PUGIXML)
+
+    include_directories(BEFORE SYSTEM
+      ${PUGIXML_INCLUDE_DIR}
+    )
+
+    if(PROJECT_STATIC_LINK)
+      link_libraries(
+        pugixml::static
+      )
+    else()
+      link_libraries(
+        pugixml::pugixml
+      )
+    endif()
+  elseif(NOT PROJECT_IS_MINGW OR CMAKE_HOST_WIN32)
+    ExternalProject_Add(pugixml_project
+      PREFIX external
+      URL ${PROJECT_3RD_PARTY_DIR}/pugixml-${PUGIXML_VERSION}.tar.gz
+      URL_HASH SHA256=2f10e276870c64b1db6809050a75e11a897a8d7456c4be5c6b2e35a11168a015
+      LIST_SEPARATOR |
+      CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
+        -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
+        -DBUILD_STATIC_LIBS=ON
+    )
+
+    set(PROJECT_DEPENDENCIES 
+      ${PROJECT_DEPENDENCIES}
+      pugixml_project
+    )
+  endif()
+endif()