Do not run lightweight_test_fail16.cpp under CMake, as CTest doesn't like std::abort

doc/lightweight_test.qbk

@@ -51,8 +51,16 @@ When using `lightweight_test.hpp`, *do not forget* to
 
 namespace boost
 {
-    int report_errors();
-}
+
+int report_errors();
+
+namespace core
+{
+
+void lwt_init();
+
+} // namespace core
+} // namespace boost
 ``
 
 [endsect]
@@ -246,6 +254,25 @@ Return the error count from `main`.
 
 [endsect]
 
+[section lwt_init]
+
+``
+void boost::core::lwt_init()
+``
+
+Performs one-time initialization. Disables the interactive message
+boxes displayed by the Microsoft Windows debug runtime library on
+`abort`, failing `assert`, and other abnormal program terminations
+(to facilitate unattended testing), and ensures that in case
+`boost::report_errors` is not called (a common mistake), the program
+ends with a nonzero exit code.
+
+`lwt_init` is automatically called by the test macros. There is
+no need to call it explicitly, except in cases where a test fails due
+to e.g. an assertion failure before the first test macro is invoked.
+
+[endsect]
+
 [section Example]
 
 ``

include/boost/core/lightweight_test.hpp

@@ -42,7 +42,6 @@
 
 namespace boost
 {
-
 namespace detail
 {
 
@@ -519,6 +518,15 @@ inline int report_errors()
     return errors < 256? errors: 255;
 }
 
+namespace core
+{
+
+inline void lwt_init()
+{
+    boost::detail::test_results();
+}
+
+} // namespace core
 } // namespace boost
 
 #define BOOST_TEST(expr) ( ::boost::detail::test_impl(#expr, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION, (expr)? true: false) )

test/Jamfile.v2

@@ -148,6 +148,7 @@ run-fail lightweight_test_fail12.cpp ;
 run-fail lightweight_test_fail13.cpp ;
 run-fail lightweight_test_fail14.cpp ;
 run-fail lightweight_test_fail15.cpp ;
+run-fail lightweight_test_fail16.cpp : ;
 run-fail lightweight_test_lt_fail.cpp ;
 run-fail lightweight_test_le_fail.cpp ;
 run-fail lightweight_test_gt_fail.cpp ;

test/lightweight_test_fail16.cpp

@@ -0,0 +1,12 @@
+// Copyright 2022 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/core/lightweight_test.hpp>
+
+// Should fail, because boost::report_errors() hasn't been called
+
+int main()
+{
+    boost::core::lwt_init();
+}