From 1d1fe814c9a46905bdf996af34c0ff81bf6f8d22 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Sat, 22 Jun 2019 12:50:15 -0400
Subject: configure.ac: Check shell for local

---
diff --git a/NEWS b/NEWS
index 64453df..d983b9c 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,11 @@ Utilities:
   * opkbuild now supports commands with arguments as arguments to the
     "-r" option, for example "-r 'env -i fakeroot'".
 
+Build system:
+
+  * configure now checks the shell for support for the "local" keyword
+    and 64-bit arithmetic.
+
 opkbuild version 4.1.1
 ----------------------
 
diff --git a/configure.ac b/configure.ac
index 113009a..f6e438f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,6 +57,14 @@ AC_ARG_WITH(
 		fi
 	]
 )
+AC_MSG_CHECKING([whether ${SH} supports \`local'])
+if test x"$(${SH} -c 'f() { local v=2; }; v=1; f; printf "%d\n" "${v}";' \
+		2>&AS_MESSAGE_LOG_FD)" = x'1'; then
+	AC_MSG_RESULT([yes])
+else
+	AC_MSG_RESULT([no])
+	AC_MSG_ERROR([a shell with \`local' is required])
+fi
 AC_MSG_CHECKING([whether ${SH} supports 64-bit arithmetic])
 if test x"$(${SH} -c 'printf "%s\n" "$((2 << 61))"' 2>&AS_MESSAGE_LOG_FD)" = \
 		x'4611686018427387904'; then
--
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