--- src/CMakeLists.txt.orig	2020-09-12 17:40:11 UTC
+++ src/CMakeLists.txt
@@ -14,7 +14,7 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-  link_libraries(pthread m stdc++ stdc++fs)
+  link_libraries(pthread m stdc++)
 endif()
 
 set(OPENSTA_HOME ${PROJECT_SOURCE_DIR}/src/OpenSTA)
@@ -87,7 +87,7 @@ if (TCL_READLINE_H)
   message(STATUS "TCL readline header: ${TCL_READLINE_H}")
 endif()
 
-find_package(SWIG REQUIRED 3.0)
+find_package(SWIG REQUIRED)
 include(UseSWIG)
 set(OPENDB_SWIG_WARNINGS "-w509,503,501,472,467,402,401,317,325,378,383,389,365,362,314,258,240,203,201")