Language

• The GNU C Reference Manual
• The GNU C Library Reference Manual
• The GNU C Preprocessor
• C reference
• comp.lang.c FAQ
• Modern C – Jens Gustedt

Memory allocation

• Wikipedia article on C dynamic memory allocation

Flexible arrays

• Bounded Flexible Arrays in C – Kees Cook
• Arrays of Length Zero – GCC

Undefined behavior

• How ISO C became unusable for operating systems development
• A Guide to Undefined Behavior in C and C++
• What Every C Programmer Should Know About Undefined Behavior

Make

• GNU Make Manual
• A Super-Simple Makefile for Medium-Sized C/C++ Projects

Volatile keyword

• How to Use C’s volatile Keyword (Barr Group)
• Nine ways to break your systems code using volatile

Coding standards

• Updated version of the Indian Hill C Style and Coding Standards

Test

• Wikipedia: a list of C unit testing frameworks
• From ThrowTheSwitch.org:
  • Unity: unit testing
  • CMock: generation of stubs and mocks
  • Ceedling: test build management

Obfuscation

• Some obfuscation tricks

Network programming

• Beej’s Guide to Network Programming Using Internet Sockets

Misc.

• The Development of the C Language – Dennis M. Ritchie