From 24b2809011b3298e781e46af54491d85598f293d Mon Sep 17 00:00:00 2001
From: "Niall Douglas (s [underscore] sourceforge {at} nedprod [dot] com)"
 <spamtrap@nedprod.com>
Date: Wed, 15 Apr 2020 12:10:07 +0100
Subject: Filled out the last of the i/o multiplexer interface and lifecycle.

---
 CMakeLists.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3010e7a..3866d3a0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -194,6 +194,14 @@ int main() {
 }
 " CXX_HAS_CXX17_FILESYSTEM)
 if(NOT CXX_HAS_CXX17_FILESYSTEM)
+  check_cxx_source_linkage("
+#include <experimental/filesystem>
+int main() {
+  try { return std::experimental::filesystem::path(\"hi\").empty(); } catch(std::experimental::filesystem::filesystem_error) { return 1; }
+}
+" CXX_HAS_CXX_EXPERIMENTAL_FILESYSTEM)
+endif()
+if(NOT CXX_HAS_CXX17_FILESYSTEM AND NOT CXX_HAS_CXX_EXPERIMENTAL_FILESYSTEM)
   indented_message(STATUS "NOTE: Standard <filesystem> not found in the current compiler configuration (try forcing C++ 17 or later?), attempting to figure out what <experimental/filesystem> linker flags to use for this STL ...")
   # Are we on libstdc++ or libc++?
   check_cxx_source_compiles("
-- 
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