diff -uNr libiconv-1.16/libcharset/include/libcharset.h.in libiconv-1.16-work/libcharset/include/libcharset.h.in
--- libiconv-1.16/libcharset/include/libcharset.h.in	2018-09-17 19:07:42.000000000 +0300
+++ libiconv-1.16-work/libcharset/include/libcharset.h.in	2019-12-04 17:15:50.000000000 +0300
@@ -33,7 +33,7 @@
    by the corresponding pathname with the current prefix instead.  Both
    prefixes should be directory names without trailing slash (i.e. use ""
    instead of "/").  */
-extern void libcharset_set_relocation_prefix (const char *orig_prefix,
+extern void LIBCHARSET_DLL_EXPORTED libcharset_set_relocation_prefix (const char *orig_prefix,
                                               const char *curr_prefix);