26.3 Environment

ISO Standard:	“The name and type of the function called at program start-up in a freestanding environment (5.1.2.1).”
Implementation:	`int main (void);`
ISO Standard:	“The effect of program termination in a freestanding environment (5.1.2.1).”
Implementation:	An infinite loop (branch to self) instruction will be executed.
ISO Standard:	“An alternative manner in which the main function may be defined (5.1.2.2.1).”
Implementation:	`int main (void);`
ISO Standard:	“The values given to the strings pointed to by the `argv` argument to `main` (5.1.2.2.1).”
Implementation:	No arguments are passed to main. Reference to `argc` or `argv` is undefined.
ISO Standard:	“What constitutes an interactive device (5.1.2.3).”
Implementation:	Application defined.
ISO Standard:	“Signals for which the equivalent of`signal(sig, SIG_IGN);` is executed at program start-up (7.14.1.1).”
Implementation:	Signals are application defined.
ISO Standard:	“The form of the status returned to the host environment to indicate unsuccessful termination when the `SIGABRT` signal is raised and not caught (7.20.4.1).”
Implementation:	The host environment is application defined.
ISO Standard:	“The forms of the status returned to the host environment by the `exit` function to report successful and unsuccessful termination (7.20.4.3).”
Implementation:	The host environment is application defined.
ISO Standard:	“The status returned to the host environment by the exit function if the value of its argument is other than zero, `EXIT_SUCCESS`, or `EXIT_FAILURE` (7.20.4.3).”
Implementation:	The host environment is application defined.
ISO Standard:	“The set of environment names and the method for altering the environment list used by the `getenv` function (7.20.4.4).”
Implementation:	The host environment is application defined.
ISO Standard:	“The manner of execution of the string by the system function (7.20.4.5).”
Implementation:	The host environment is application defined.

ISO Standard:

“The name and type of the function called at program start-up in a freestanding environment (5.1.2.1).”

Implementation:

int main (void);

ISO Standard:

“The effect of program termination in a freestanding environment (5.1.2.1).”

Implementation:

An infinite loop (branch to self) instruction will be executed.

ISO Standard:

“An alternative manner in which the main function may be defined (5.1.2.2.1).”

Implementation:

int main (void);

ISO Standard:

“The values given to the strings pointed to by the argv argument to main (5.1.2.2.1).”

Implementation:

No arguments are passed to main. Reference to argc or argv is undefined.

ISO Standard:

“What constitutes an interactive device (5.1.2.3).”

Implementation:

Application defined.

ISO Standard:

“Signals for which the equivalent of

 signal(sig,
                                    SIG_IGN);

is executed at program start-up (7.14.1.1).”

Implementation:

Signals are application defined.

ISO Standard:

“The form of the status returned to the host environment to indicate unsuccessful termination when the SIGABRT signal is raised and not caught (7.20.4.1).”

Implementation: