Am 05.09.2018 um 07:55 schrieb John Selbie:
With this: g++ foo.cpp -c -std=c++11
It compiles fine everywhere else, except CygWin. Output on Cygwin:
I'm afraid that may mean everywhere else is wrong.
Yes, switching to -std=gnu++11 or adding -D_DEFAULT_SOURCE to the command
line line works.
But I don't understand why the need to enforce these extensions to get
access to some of the most common unix libraries?
Because that's what std=c++11 is meant and documented to do. It turns
off all extensions to the standard language. And yes, that does include
extensions to the standard libary, up to and including POSIX-specific
content.
For what you want to do, std=c++11 is simply the wrong setting.
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