On 16/02/16 10:13 -0600, Richard Shaw wrote:
This seems like a pretty basic error in something that has worked fine for a very long time. Is there anything in the GCC 6 update that would cause this?
This no longer compiles with GCC 6: #define max(a, b) (a > b ? a : b) #include <stdlib.h> int i = max(0,1); The reason is that 'max' is used throughout the standard library, and it's undefined behaviour to define a macro that clashes with any name defined in the standard library. Previously <stdlib.h> was not provided by GCC's C++ std::lib, so didn't #undef min and max. Now GCC provides its own C++-conforming <stdlib.h> and so it does #undef min and #undef max. If that's the cause, the code might have been working fine but was always relying on undefined behaviour. I suggest #include <algorithm> and using std::max; -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx http://lists.fedoraproject.org/admin/lists/devel@xxxxxxxxxxxxxxxxxxxxxxx
