From 191d21f2acde7c2fa3003972a8b04bc080d64e2d Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Thu, 3 May 2018 07:17:05 +0000
Subject:  Add nullispointer sysdep

---
 configure                      |  1 +
 src/sysdeps/trynullispointer.c | 12 ++++++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 src/sysdeps/trynullispointer.c

diff --git a/configure b/configure
index f785a63..3959c9a 100755
--- a/configure
+++ b/configure
@@ -503,6 +503,7 @@ EOF
   rm -f tryendianness
 
   trytypes
+  choose clr nullispointer NULLISPOINTER 'a pointer-typed NULL'
   choose clr accept4 ACCEPT4 'accept4()'
   choose clr ancilautoclose ANCILAUTOCLOSE 'auto-close after fd-passing'
   choose c cmsgcloexec CMSGCLOEXEC 'MSG_CMSG_CLOEXEC'
diff --git a/src/sysdeps/trynullispointer.c b/src/sysdeps/trynullispointer.c
new file mode 100644
index 0000000..cbb3340
--- /dev/null
+++ b/src/sysdeps/trynullispointer.c
@@ -0,0 +1,12 @@
+/* ISC license. */
+
+/* Explanation: http://www.openwall.com/lists/musl/2013/01/09/13 */
+
+#include <stddef.h>
+
+int main (void)
+{
+  char s[1][1+(int)NULL] ;
+  int i = 0 ;
+  return sizeof s[i++], !i ;
+}
-- 
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