Fix MacOS build with boost 1.73 and updated Homebrew packages

src/Mod/Cloud/App/AppCloud.cpp

@@ -53,6 +53,7 @@
 
 using namespace App;
 using namespace std;
+using namespace boost::placeholders;
 XERCES_CPP_NAMESPACE_USE
 
 /* Python entry */

src/Mod/Cloud/App/CMakeLists.txt

@@ -1,3 +1,6 @@
+if (APPLE)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OPENSSL_CFLAGS}")
+endif()
 
 include_directories(
     ${Boost_INCLUDE_DIRS}