From 6b34e8a80490334c597bbe3f8b0ea99a282930b1 Mon Sep 17 00:00:00 2001
From: Lovell Fuller <github@lovell.info>
Date: Tue, 25 Jul 2017 14:54:44 +0100
Subject: [PATCH] Docs: FreeBSD gcc v4/v5 needs _GLIBCXX_USE_C99 for C++11 #873

---
 docs/install.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/install.md b/docs/install.md
index 19e1dc26..b2950e0a 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -91,6 +91,9 @@ This can be achieved via [FreshPorts](https://www.freshports.org/graphics/vips/)
 cd /usr/ports/graphics/vips/ && make install clean
 ```
 
+FreeBSD's gcc v4 and v5 need `CXXFLAGS=-D_GLIBCXX_USE_C99` set for C++11 support due to
+https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193528
+
 ### Heroku
 
 libvips and its dependencies are fetched and stored within `node_modules\sharp\vendor` during `npm install`.