new_build_system (#18)

Reviewed-on: #18

cmake/libraries/cpp_httplib.cmake

@@ -10,7 +10,7 @@ if(PROJECT_ENABLE_CPP_HTTPLIB)
     ExternalProject_Add(cpphttplib_project
       PREFIX external
       URL ${PROJECT_3RD_PARTY_DIR}/cpp-httplib-${CPP_HTTPLIB_VERSION}.tar.gz
-      URL_HASH SHA256=c125022eb85eaa12235518dc4638be93b62c3216d0f87b655af7b17b71b38851
+      URL_HASH SHA256=${CPP_HTTPLIB_HASH}
       LIST_SEPARATOR |
       CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
         -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
@@ -24,9 +24,9 @@ if(PROJECT_ENABLE_CPP_HTTPLIB)
 
     list(APPEND PROJECT_DEPENDENCIES cpphttplib_project)
 
-    add_dependencies(cpphttplib_project 
-      curl_project
-      openssl_project
-    )
+    add_dependencies(cpphttplib_project curl_project)
+    if (NOT CMAKE_HOST_WIN32)
+      add_dependencies(cpphttplib_project openssl_project)
+    endif()
   endif()
 endif()