From 691ae68db759b6cbab5a4c1a9cee4dc472d4435f Mon Sep 17 00:00:00 2001
From: Tom Black <blacktm@gmail.com>
Date: Wed, 3 Oct 2018 20:38:37 -0700
Subject: Add CFLAGS when Raspberry Pi

---
 ext/ruby2d/extconf.rb | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ext/ruby2d/extconf.rb b/ext/ruby2d/extconf.rb
index fb9d0b4..d3ddac0 100644
--- a/ext/ruby2d/extconf.rb
+++ b/ext/ruby2d/extconf.rb
@@ -74,7 +74,10 @@ end
 check_s2d_version
 
 # Add flags
-$CFLAGS  << ' -std=c11 -I/usr/local/include'
+$CFLAGS << ' -std=c11 -I/usr/local/include'
+if `cat /etc/os-release` =~ /raspbian/  # Raspberry Pi
+  $CFLAGS << ' -I/opt/vc/include'
+end
 $LDFLAGS << ' ' << `bash simple2d --libs`
 $LDFLAGS.gsub!(/\n/, ' ')  # remove newlines in flags, they cause problems
 
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