--- ./libmariadb/CMakeLists.txt.orig	2019-04-16 11:28:54.000000000 +0200
+++ ./libmariadb/CMakeLists.txt	2019-06-18 13:36:43.643443780 +0200
@@ -303,7 +303,9 @@
   IF(ICONV_INCLUDE_DIR)
      INCLUDE_DIRECTORIES(BEFORE ${ICONV_INCLUDE_DIR}) 
   ENDIF()
-  ADD_DEFINITIONS(-DLIBICONV_PLUG)
+  IF(NOT CMAKE_SYSTEM_NAME MATCHES AIX)
+    ADD_DEFINITIONS(-DLIBICONV_PLUG)
+  ENDIF()
 ENDIF()
 
 IF(ZLIB_FOUND AND WITH_EXTERNAL_ZLIB)