Update after gnulib changed on 2020-08-26.
diff --git a/ChangeLog b/ChangeLog
index 5a1e806..50b6bee 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
2021-01-31 Bruno Haible <bruno@clisp.org>
+ Update after gnulib changed on 2020-08-26.
+ * configure.ac: Test $iconv_arg1, not $am_cv_proto_iconv_arg1.
+
+2021-01-31 Bruno Haible <bruno@clisp.org>
+
Switch to autoconf 2.71.
* autogen.sh: Update comment.
* configure.ac: Use AS_HELP_STRING instead of AC_HELP_STRING. Invoke
diff --git a/configure.ac b/configure.ac
index 43ec5ca..6fe4a7e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -105,7 +105,7 @@
dnl checks for header files, functions and declarations
-if test "$am_cv_func_iconv" = yes -a -n "$am_cv_proto_iconv_arg1"; then
+if test "$am_cv_func_iconv" = yes -a -n "$iconv_arg1"; then
ICONV_CONST="const"
else
ICONV_CONST=""
