+AC_CHECK_FUNCS(strndup strlcpy getpwent_r strtok_r)
+AC_CHECK_LIB(iconv, libiconv_open, LIBS="$LIBS -liconv")
+old_ldflags="${LDFLAGS}"
+LDFLAGS="${LDFLAGS} -Wl,-export-dynamic"
+AC_TRY_LINK(, [int i;], found_export_dynamic=yes, found_export_dynamic=no)
+if test $found_export_dynamic = no; then
+ LDFLAGS="${old_ldflags}"
+fi
+
+AC_CHECK_HEADERS(getopt.h sys/time.h sys/wait.h pwd.h langinfo.h iconv.h)