looks on /usr/include/sys/features.h
for details.
Default is _GNU_SOURCE that includes everthing.
Check if your project is restricting the definition with -std or ansi
__POSIX_VISIBLE is ruining my pthreading on cygwin
looks on /usr/include/sys/features.h
for details.
Default is _GNU_SOURCE that includes everthing.
Check if your project is restricting the definition with -std or ansi