From b428dceeaf87fb35a16c2337ac13105f7d18dfd3 Mon Sep 17 00:00:00 2001
From: David Goldblatt <davidgoldblatt@fb.com>
Date: Sat, 29 Feb 2020 16:53:00 -0800
Subject: [PATCH] Config: Warn on void * pointer arithmetic.

This is handy while developing, but not portable.
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 6ccd009a..324656b9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -250,6 +250,7 @@ if test "x$GCC" = "xyes" ; then
   JE_CFLAGS_ADD([-Wsign-compare])
   JE_CFLAGS_ADD([-Wundef])
   JE_CFLAGS_ADD([-Wno-format-zero-length])
+  JE_CFLAGS_ADD([-Wpointer-arith])
   dnl This warning triggers on the use of the universal zero initializer, which
   dnl is a very handy idiom for things like the tcache static initializer (which
   dnl has lots of nested structs).  See the discussion at.