From 30214adc0a39b0bb144e060184b47f4e26ad6757 Mon Sep 17 00:00:00 2001
From: Axel Huebl <axel.huebl@plasma.ninja>
Date: Thu, 21 Jan 2016 17:42:46 +0100
Subject: [PATCH] Fix #75 <complex> may define macro I

Fix #75 as described by undefining the macro `I` from `<complex>`
if defined (as in `glibc`).

This seems to be the only include of it.
---
 include/pybind11/complex.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/pybind11/complex.h b/include/pybind11/complex.h
index 10da21d02..a140f6feb 100644
--- a/include/pybind11/complex.h
+++ b/include/pybind11/complex.h
@@ -12,6 +12,11 @@
 #include "pybind11.h"
 #include <complex>
 
+/// glibc defines I as a macro which breaks things, e.g., boost template names
+#ifdef I
+#  undef I
+#endif
+
 NAMESPACE_BEGIN(pybind11)
 
 PYBIND11_DECL_FMT(std::complex<float>, "Zf");