What does "#define _GNU_SOURCE" imply?

What does "#define _GNU_SOURCE" imply?

c posix gnu

c

What is the role of libc(glibc) in our linux app?

c linux gnu

c

Invoking GCC as "cc" versus "gcc"

c linux gcc compiler-construction gnu

c

Why use asprintf() instead of sprintf()?

c printf gnu asprintf

c

What is GLIBC? What is it used for?

c gnu glibc standard-library

c

attribute((const)) vs attribute((pure)) in GNU C

c gcc attributes constants gnu

c

Are gnu syslog(), openlog() and closelog() thread-safe?

c linux gnu syslog

c

How does one go about understanding GNU source code?

c project gnu

c

Library for parsing arguments GNU-style? [closed]

c linux arguments gnu

c