From 7e2d28e2042e55d7d6c8e55e533c4c6762591d69 Mon Sep 17 00:00:00 2001
From: Vincent Cheng <vcheng@debian.org>
Date: Sat, 25 Oct 2014 14:04:53 -0700
Subject: [PATCH] pass any preprocessor flags defined by environment to gcc

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 86743f0..ab37e6e 100644
--- a/Makefile
+++ b/Makefile
@@ -30,4 +30,4 @@ CXXFLAGS += -DPRIMUS_libGLd='"$(PRIMUS_libGLd)"'
 
 $(LIBDIR)/libGL.so.1: libglfork.cpp
 	mkdir -p $(LIBDIR)
-	$(CXX) $(CXXFLAGS) -fvisibility=hidden -fPIC -shared -Wl,-Bsymbolic -o $@ $< -lX11 -lpthread -lrt
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -fvisibility=hidden -fPIC -shared -Wl,-Bsymbolic -o $@ $< -lX11 -lpthread -lrt