-O1/2/3 with -std=c++1y/11/98 - If is included i'm getting error: '_hypot' was not declared in this scope

Question

I\'ve just updated MinGW using mingw-get-setup and i\'m unable to build anyting that contains header if I use anything larger than

Answer 1

As noted by Keith, this is a bug in the MinGW.org header.

As an alternative to editing the MinGW.org header, you can use MinGW-w64, which provides everything MinGW.org provides, and a whole lot more. For a list of differences between the runtimes, see this wiki page.