How to check if char pointer is a constant!?

"Daniel." <[email protected]> Thu, 7 Jul 2016 16:40:56 -0300

Newsgroups	gmane.linux.c-programming
Message-ID	<CAF3SDA6G32Kub4rK5BSmx7TkWoXnGWW2ESyHnM_+3t-naVPDww@mail.gmail.com>

Hi everybody,

I have some function, say
void empty(char *p) { p[0] = '\0'; }

If I call it like this empty("Hello") it will segfaults since "Hello"
is put in readonly section of the program. Is there a way to check for
this?! Maybe some nasty gcc extension!?

Regards,

-- 
"Do or do not. There is no try"
  Yoda Master
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