From f141a3a53fe44c343d8599112f38830016e45044 Mon Sep 17 00:00:00 2001
From: "Niall Douglas (s [underscore] sourceforge {at} nedprod [dot] com)"
 <spamtrap@nedprod.com>
Date: Tue, 19 Jun 2018 21:16:09 +0100
Subject: Add single-header sanity check.

---
 CMakeLists.txt | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5feb59e5..fd9a94d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,8 +168,18 @@ foreach(lib afio_sl afio_dl)
   target_compile_definitions(${lib} INTERFACE AFIO_HEADERS_ONLY=0) 
   target_compile_definitions(${lib} PRIVATE AFIO_SOURCE=1) 
 endforeach()
+set(compiler_has_cxx_17 0)
+foreach(feature ${CMAKE_CXX_COMPILE_FEATURES})
+  if(feature STREQUAL "cxx_std_17")
+    set(compiler_has_cxx_17 1)
+  endif()
+endforeach()
 # The single header test requires C++ 17
-target_compile_features(afio-example_single-header PRIVATE cxx_std_17)
+if(compiler_has_cxx_17)
+  target_compile_features(afio-example_single-header PRIVATE cxx_std_17)
+else()
+  set_target_properties(afio-example_single-header PROPERTIES EXCLUDE_FROM_ALL ON EXCLUDE_FROM_DEFAULT_BUILD ON)
+endif()
 
 # For all possible configurations of this library, add each test
 include(QuickCppLibMakeStandardTests)
-- 
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