(gcc.info.gz) C Implementation

 
 4 C Implementation-defined behavior
 ***********************************
 
 A conforming implementation of ISO C is required to document its choice
 of behavior in each of the areas that are designated "implementation
 defined".  The following lists all such areas, along with the section
 numbers from the ISO/IEC 9899:1990 and ISO/IEC 9899:1999 standards.
 Some areas are only implementation-defined in one version of the
 standard.
 
  Some choices depend on the externally determined ABI for the platform
 (including standard character encodings) which GCC follows; these are
 listed as "determined by ABI" below.   Binary Compatibility
 Compatibility, and `http://gcc.gnu.org/readings.html'.  Some choices
 are documented in the preprocessor manual.  
 Implementation-defined behavior (cpp)Implementation-defined behavior.
 Some choices are made by the library and operating system (or other
 environment when compiling for a freestanding environment); refer to
 their documentation for details.

 
* Translation implementation
* Environment implementation
* Identifiers implementation
* Characters implementation
* Integers implementation
* Floating point implementation
* Arrays and pointers implementation
* Hints implementation
* Structures unions enumerations and bit-fields implementation
* Qualifiers implementation
* Declarators implementation
* Statements implementation
* Preprocessing directives implementation
* Library functions implementation
* Architecture implementation
* Locale-specific behavior implementation

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