Disable <=> tests when <compare> isn't available

Author: pdimov

test/array_thw_test.cpp

@@ -18,6 +18,11 @@ int main() {}
 BOOST_PRAGMA_MESSAGE( "Test skipped because __cpp_impl_three_way_comparison is defined to " BOOST_STRINGIZE(__cpp_impl_three_way_comparison) )
 int main() {}
 
+#elif !__has_include(<compare>)
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because <compare> is not available" )
+int main() {}
+
 #else
 
 template<class T, std::size_t N> void test()

test/array_thw_test_cx.cpp

@@ -18,6 +18,11 @@ int main() {}
 BOOST_PRAGMA_MESSAGE( "Test skipped because __cpp_impl_three_way_comparison is defined to " BOOST_STRINGIZE(__cpp_impl_three_way_comparison) )
 int main() {}
 
+#elif !__has_include(<compare>)
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because <compare> is not available" )
+int main() {}
+
 #else
 
 #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)