From 69ebb03efc30cddc9d20051a22b6f09ee2571922 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <pj@pehjota.net>
Date: Fri, 15 Sep 2017 01:11:44 -0400
Subject: configure.ac: s/ -I/ -isystem/g in libraries' CFLAGS

This suppresses warnings in libraries' headers.
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(limited to 'm4')

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