From 4e76f73826fd0a7067b837e4850a9051436f5ec5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Micha=C3=ABl=20Celerier?=
 <jeanmichael.celerier+github@gmail.com>
Date: Sun, 22 Dec 2019 10:26:38 +0100
Subject: [PATCH] Fix build on windows with libc++

Proposed by @SquallATF in #67
---
 include/boost/iostreams/detail/config/fpos.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/iostreams/detail/config/fpos.hpp b/include/boost/iostreams/detail/config/fpos.hpp
index c5dc6cf59..a5835421f 100644
--- a/include/boost/iostreams/detail/config/fpos.hpp
+++ b/include/boost/iostreams/detail/config/fpos.hpp
@@ -26,7 +26,8 @@
 
 # if (defined(_YVALS) || defined(_CPPLIB_VER)) && !defined(__SGI_STL_PORT) && \
      !defined(_STLPORT_VERSION) && !defined(__QNX__) && !defined(_VX_CPU) && !defined(__VXWORKS__) \
-     && !((defined(BOOST_MSVC) || defined(BOOST_CLANG)) && _MSVC_STL_VERSION >= 141)
+     && !((defined(BOOST_MSVC) || defined(BOOST_CLANG)) && _MSVC_STL_VERSION >= 141) \
+     && !defined(_LIBCPP_VERSION)
      /**/
 
 #include <boost/iostreams/detail/ios.hpp>