On Mon, Sep 14, 2015 at 11:11:21AM -0300, Bruno Schneider wrote: > I'm trying to compile C++ code with the built-in "add with oveflow > check" functions[1]. But the compiler complains the built-ins have not > been declared. I'm using g++ 4.9.2. You need GCC 5 or later for those builtins. > [1] https://gcc.gnu.org/onlinedocs/gcc/Integer-Overflow-Builtins.html That is the documentation for the latest released version of the compiler. onlinedocs/gcc-4.9.2/gcc/ etc. for your specific version. Segher
