implies

Glibc 2.3.2源代码(解压后有100多M)

# The gnu subdirectory exists for things common to both Linux-based and
# Hurd-based GNU systems.
gnu

# Linux shares most of the syscalls which are also common to BSD and SVR4.
unix/common

# Linux as of version 1.3.29 has all functions of the mmap family
# which are described in POSIX.4.  Missing is only madvise() so
# we define a stub here.
unix/mman

# Linux has network support in the kernel.
unix/inet