--- ./CMakeLists.txt.ORIG	2020-06-04 10:46:58 +0200
+++ ./CMakeLists.txt	2020-10-08 14:08:44 +0200
@@ -220,7 +220,8 @@
 	IF (MINGW OR MSYS) # MinGW and MSYS always do PIC and complain if we tell them to
 		STRING(REGEX REPLACE "-fPIC" "" CMAKE_SHARED_LIBRARY_C_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}")
 	ELSEIF (BUILD_SHARED_LIBS)
-		ADD_C_FLAG_IF_SUPPORTED(-fvisibility=hidden)
+		# See "pygit2 or libgit2 for AIX" thread on community.ibm.com
+		# ADD_C_FLAG_IF_SUPPORTED(-fvisibility=hidden)
 
 		SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
 	ENDIF ()