https://github.com/facebook/proxygen/issues/335

--- proxygen/httpserver/CMakeLists.txt.orig	2020-09-08 18:29:13 UTC
+++ proxygen/httpserver/CMakeLists.txt
@@ -5,7 +5,7 @@
 # LICENSE file in the root directory of this source tree.
 
 add_library(
-    proxygenhttpserver STATIC
+    proxygenhttpserver
     RequestHandlerAdaptor.cpp
     SignalHandler.cpp
     HTTPServerAcceptor.cpp