On Jan 16, 2014, at 12:50 , Joel Sherrill <[email protected]> wrote:
>
> gcc optimizes calls to printf with fixed strings (e.g. no formatting
> parameters)
> into calls to puts.
>
In the absence of any header files, and with a declaration of what "printf()"
is supposed to do, this code snippet, without any optimization enabled, and
without including any header files, and with a declaration of what the external
printf() function does, generates a call to puts() on gcc (GCC) 4.4.7 20120313
(Red Hat 4.4.7-4).
Are there C standards that makes this less surprising than it is to me? Is
"printf()" now a language feature?
int printf(const char *s, ...);
int main(int ac, char *av[])
{
printf("Hello world!\n");
return 0;
}
Peter
-----------------
Peter Dufault
HD Associates, Inc. Software and System Engineering
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