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Discussion of C11.

Links:

• C11: A New C Standard Aiming at Safer Programming
• C in a Nutshell (2e)
• 21st Century C
• cppreference.com

• clang
• valgrind
• meld [for graphical diff]
• strace; ltrace
• splint
• pkg-config
• gdb; lldb

• List the properties of “embedded C”.

• 21st Century C
• GCC extensions
• SEI CERT C Coding Standard

• digraphs/trigraphs
• “return”ing from main, no need as it's default return zero

• simple language, most work done by library routines (standard + math)
• “translation unit”
• predefined identifier __func__
• scopes:
  • file
  • block
  • function prototype
  • function

• scalar
  • arithmetic
    • basic
    • enums
  • pointers
• aggregate
  • array
  • structure

• #define

• include_next

• because C is a very simple language

• ptrdiff_t, size_t
• inline functions
• flexible array/structure member
• multi-threading
• type-generic macros
• variadic macros
• assert(), static_assert(), _Static_assert()
• new library functions(?)
• include_next
• compound literals
• variadic functions (p. 127)
• “restrict” type qualifier
• offsetof()
• generic selections (_Generic)
• Define “embedded C”.
• syntactic analysers
• setjmp/longjmp
• exit/quick_exit/_Exit/at_exit/at_quick_exit

auto      extern    short     while
break     float     signed    _Alignas
case      for       sizeof    _Alignof
char      goto      static    _Atomic
const     if        struct    _Bool
continue  inline    switch    _Complex
default   int       typedef   _Generic
do        long      union     _Imaginary
double    register  unsigned  _Noreturn
else      restrict  void      _Static_assert
enum      return    volatile  _Thread_local

• name spaces
  • labels
  • tags (struct, union, enum)
  • struct or union members
  • all others
• scopes
  • file
  • block
  • function prototype
  • function
• GNU glibc contains:
  • standard library
  • math library
• multi-threading
  • thread local
  • quick_exit()
• anonymous structs/unions
• type-generic functions
• memory alignment control
• _Noreturn function specifier
• Unicode support
• static assertions
• bounds-checking functions

• long long
• _Bool (reserved keyword)

• declaration versus definition
• no nested functions but can declare a function inside another one
• wide versus multibyte characters
• digraphs and trigraphs
• scope:
  • file
  • block
  • prototype
  • function (includes labels)
• alignment
  • _Alignof
  • _Alignas
• __func__
• generic selections
• compound literals

• element designators

• C11 threads versus POSIX threads (threads.h)