Original HN announcement&#x2F;discussion [<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=8974024" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=8974024</a>].  CFLAGS additions produce smaller binaries.  HelloWorld in 608 bytes (i386) and 792 bytes (x86_64).  An example of sbrk&#x2F;brk provided in the test folder.