>From b8124d982f454b8526b5e11934a2f71faac2b600 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Wed, 15 Dec 2021 21:49:41 +0100
Subject: [PATCH 1/3] automake-subdir support: Look for 'subdir-objects' also
 in configure.ac.

* gnulib-tool: Look for the automake options also in the first argument
of the AM_INIT_AUTOMAKE invocation in configure.ac.
---
 ChangeLog   |  6 ++++++
 gnulib-tool | 20 +++++++++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 5048863fa..dafd27b66 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2021-12-15  Bruno Haible  <bruno@clisp.org>
+
+	automake-subdir support: Look for 'subdir-objects' also in configure.ac.
+	* gnulib-tool: Look for the automake options also in the first argument
+	of the AM_INIT_AUTOMAKE invocation in configure.ac.
+
 2021-12-15  Bruno Haible  <bruno@clisp.org>
 
 	Add simple examples.
diff --git a/gnulib-tool b/gnulib-tool
index 70ea17a4c..0d2b7e635 100755
--- a/gnulib-tool
+++ b/gnulib-tool
@@ -1594,7 +1594,6 @@ func_determine_path_separator
     # "autoconf --trace=AC_PREREQ" fails with an error message like this:
     #   m4: aclocal.m4:851: Cannot open m4/absolute-header.m4: No such file or directory
     #   autom4te: m4 failed with exit status: 1
-    prereqs=
     my_sed_traces='
       s,#.*$,,
       s,^dnl .*$,,
@@ -1621,10 +1620,25 @@ func_determine_path_separator
   # Determine whether --automake-subdir is supported.
   if $automake_subdir; then
     found_subdir_objects=false
+    if test -n "$configure_ac"; then
+      my_sed_traces='
+        s,#.*$,,
+        s,^dnl .*$,,
+        s, dnl .*$,,
+        /AM_INIT_AUTOMAKE/ {
+          s,^.*AM_INIT_AUTOMAKE([[ ]*\([^])]*\).*$,\1,p
+        }'
+      automake_options=`sed -n -e "$my_sed_traces" < "$configure_ac"`
+      for option in $automake_options; do
+        case "$option" in
+          subdir-objects ) found_subdir_objects=true ;;
+        esac
+      done
+    fi
     if test -f "${destdir:-.}"/Makefile.am; then
       automake_options=`sed -n -e 's/^AUTOMAKE_OPTIONS[	 ]*=\(.*\)$/\1/p' "${destdir:-.}"/Makefile.am`
-      for arg in $automake_options; do
-        case "$arg" in
+      for option in $automake_options; do
+        case "$option" in
           subdir-objects ) found_subdir_objects=true ;;
         esac
       done
-- 
2.25.1