From 290ea7840c979e38a2108030a99e7e9c61f40a8c Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 23 Nov 2017 11:43:02 +0200
Subject: Restructure and install std-detect.hxx

We have to install this header since it needs to be included'able during
module sidebuilds.
---
 libstd-modules/std-detect.hxx | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 libstd-modules/std-detect.hxx

(limited to 'libstd-modules/std-detect.hxx')

diff --git a/libstd-modules/std-detect.hxx b/libstd-modules/std-detect.hxx
new file mode 100644
index 0000000..b2998b5
--- /dev/null
+++ b/libstd-modules/std-detect.hxx
@@ -0,0 +1,15 @@
+// To detect the standard library we need to include a certain header first.
+//
+#if defined(__clang__)
+#  if   __has_include(<__config>)         // libc++    _LIBCPP_VERSION
+#    include <__config>
+#  elif __has_include(<bits/c++config.h>) // libstdc++ __GLIBCXX__
+#    include <bits/c++config.h>
+#  endif
+#elif defined(__GNUC__)
+#  include <bits/c++config.h>             // libstdc++ __GLIBCXX__
+#endif
+
+#if !defined(_MSC_VER) && !defined(__GLIBCXX__) && !defined(_LIBCPP_VERSION)
+#  error unknown standard library implementation
+#endif
-- 
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