Am Freitag, 10. November 2017, 10:54:53 CET schrieb Jorge Almeida:
> I'm trying to use memset_s() but the system (glibc?) doesn't know
> about it. I also tried to compile against musl, same result.
> 
> There's precious little info about memset_s in the net. Does it exist
> at all? No man page.
> 
> (https://www.cs.helsinki.fi/group/boi2016/doc/cppreference/reference/en.cppr
> eference.com/w/c/string/byte/memset.html)
> 
> What I tried:
> 
> #include <unistd.h>
> #include <stdlib.h>
> #include <stdint.h>
> #define __STDC_WANT_LIB_EXT1__  1
> #include <string.h>
> #include <stdio.h>
> 
> int main(int argc, char** argv){
> #ifndef __STDC_LIB_EXT1__
> printf("CRAP\n");
> #else
> printf("COOL\n");
> #endif
> }
> 
> Compiled with -std=c11
> 
> You can guess what the output is.
> 
> Someone using it?
> 
> Jorge Almeida

It seems as though it is simply not implemented, I found a variety of links  
that all support this:

https://stackoverflow.com/a/40162721

https://stackoverflow.com/questions/38322363/when-will-the-safe-string-functions-of-c11-be-part-of-glibc

https://gcc.gnu.org/wiki/C11Status (which states that Annex K is not 
implemented)

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1967.htm

HTH
-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup