Implement builders to build Boost from source code

tests/sources/main-headers.cpp

@@ -0,0 +1,22 @@
+#include <cassert>
+#include <exception>
+#include <iostream>
+#include <cstdint>
+
+#include <boost/safe_numerics/safe_integer.hpp>
+
+int main()
+{
+	std::cout << "Using safe numerics" << std::endl;
+    try{
+        using namespace boost::safe_numerics;
+        safe<int> x = INT_MAX - 5;
+        ++x;
+    }
+    catch(const std::exception & e){
+        std::cout << e.what() << std::endl;
+        std::cout << "error detected!" << std::endl;
+    }
+
+    return 0;
+}