From 15f9f8c85310577874a000bcb0b1773e4f23b8b3 Mon Sep 17 00:00:00 2001
From: Akim Demaille <akim.demaille@gmail.com>
Date: Mon, 29 Apr 2019 18:14:53 +0200
Subject: [PATCH] tests: don't require a D compiler

Reported by Kiyoshi Kanazawa.
http://lists.gnu.org/archive/html/bug-bison/2019-04/msg00018.html

* tests/atlocal.in (BISON_DC_WORKS): New.
* tests/local.at (AT_COMPILE_D): Use it.
---
 tests/atlocal.in | 6 ++++++
 tests/local.at   | 1 +
 2 files changed, 7 insertions(+)

diff --git a/tests/atlocal.in b/tests/atlocal.in
index f7db41e9..d8141cb9 100644
--- a/tests/atlocal.in
+++ b/tests/atlocal.in
@@ -118,8 +118,14 @@ fi
 ## Other.  ##
 ## ------- ##
 
+# Empty if no D compiler was found.
 : ${DC='@DC@'}
 : ${DCFLAGS='@DCFLAGS@'}
+if test x"$DC" = x; then
+    BISON_DC_WORKS=false
+else
+    BISON_DC_WORKS=true
+fi
 
 # Empty if no javac was found
 : ${CONF_JAVAC='@CONF_JAVAC@'}
diff --git a/tests/local.at b/tests/local.at
index 1f55bedc..9c0e85e3 100644
--- a/tests/local.at
+++ b/tests/local.at
@@ -977,6 +977,7 @@ AT_CHECK(m4_join([ ],
 # with trailing ".o" removed, and ".cc" appended.
 m4_define([AT_COMPILE_D],
 [AT_KEYWORDS(d)
+AT_SKIP_IF([[! $BISON_DC_WORKS]])
 AT_CHECK(m4_join([ ],
                  [$DC $DCFLAGS $3],
                  [m4_bmatch([$1], [[.]], [-c])],