1 files changed, 47 insertions, 0 deletions
diff --git a/t/comments-escaped-in-var.sh b/t/comments-escaped-in-var.sh
new file mode 100644
index 000000000..e06c3f359
--- /dev/null
+++ b/t/comments-escaped-in-var.sh
@@ -0,0 +1,47 @@
+#! /bin/sh
+# Copyright (C) 2022 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Make sure Automake preserves escaped comments in the output.
+
+. test-init.sh
+
+cat >> configure.ac <<'END'
+AC_OUTPUT
+END
+
+cat > Makefile.am << 'END'
+# This value should be preserved.
+var = -DVAL='"\#xxx\#"'   # this should be stripped
+var += -DX=1  # this should be kept
+END
+
+$ACLOCAL
+
+# This should fail due to -Werror.
+$AUTOMAKE && exit 1
+
+# This should pass though.
+$AUTOMAKE -Wno-portability
+
+# For debugging.
+grep ^var Makefile.in
+
+# The full flag should be retained.
+grep '^var.*\\#xxx\\#.*DX=1' Makefile.in
+
+# Only the 2nd comment should be retained.
+grep '^var.*stripped' Makefile.in && exit 1 || :
+grep '^var.*should be kept' Makefile.in