Specifications

CAVR-4
Part 2. Compiler reference
Implementation-defined behavior
267
%p in printf() (7.9.6.1)
The argument to a %p conversion specifier, print pointer, to printf() is treated as
having the type
void *. The value will be printed as a hexadecimal number, similar to
using the %x conversion specifier.
%p in scanf() (7.9.6.2)
The %p conversion specifier, scan pointer, to scanf() reads a hexadecimal number and
converts it into a value with the type void *.
Reading ranges in scanf() (7.9.6.2)
A - (dash) character is always treated as a range symbol.
File position errors (7.9.9.1, 7.9.9.4)
On file position errors, the functions fgetpos and ftell store EFPOS in errno.
Message generated by perror() (7.9.10.4)
The generated message is:
usersuppliedprefix:errormessage
Allocating zero bytes of memory (7.10.3)
The calloc(), malloc(), and realloc() functions accept zero as an argument.
Memory will be allocated, a valid pointer to that memory is returned, and the memory
block can be modified later by
realloc.
Behavior of abort() (7.10.4.1)
The abort() function does not flush stream buffers, and it does not handle files,
because this is an unsupported feature.
Behavior of exit() (7.10.4.3)
The argument passed to the exit function will be the return value returned by the main
function to
cstartup.
Environment (7.10.4.4)
The set of available environment names and the method for altering the environment list
is described in Environment interaction, page 73.