$OpenBSD: patch-configure_ac,v 1.2 2020/10/27 20:47:43 jasper Exp $

GNU libiconv provides libiconv_open() which is mapped to iconv_open()

Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -87,7 +87,7 @@ case "$host" in
 	;;
 esac
 
-AC_SEARCH_LIBS([iconv_open], [iconv], , [AC_MSG_FAILURE([cannot find the required iconv_open() function despite trying to link with -liconv])])
+AC_SEARCH_LIBS([libiconv_open], [iconv], , [AC_MSG_FAILURE([cannot find the required iconv_open() function despite trying to link with -liconv])])
 
 dnl Each prefix corresponds to a source tarball which users might have
 dnl downloaded in a newer version and would like to overwrite.
