[I accidentally replied to Jonathan intead of to the list] Jonathan Wakely to Anton Shepelev: > > On the other hand, fileno is available in > > stdio.h on Linux with -std=C++11. Is it a de- > > fect, a courtesy of the developers, or a re- > > quirement for a POSIX OS? > > That's because g++ on GNU/Linux also defines > _GNU_SOURCE for ALL -std options (this is in addi- > tion to __STRICT_ANSI__ if you used a -std=c++NN > option). Defining _GNU_SOURCE exposes all POSIX > functions and GNU extensions. > > I intend to change that one day, so _GNU_SOURCE > will never be automatically defined by the compil- > er. Thank you for the explanation. Is it possible to make the current GCC with -std=CNN behave as you in- tend it to? Will, for example, the following suf- fice: gcc -std=c++11 -U_GNU_SOURCE ?
