Glibc feature _FORTIFY_SOURCE

_FORTIFY_SOURCE is a Glibc feature which adds memory and string functionprotection. There is no home site for this feature, but it is described wellon this page: http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html

ref:

1. http://www.linuxfromscratch.org/hints/downloads/files/ssp.txt

2.https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html

3.http://manpages.courier-mta.org/htmlman7/feature_test_macros.7.html