5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/memchr.html}
9 Portability problems fixed by Gnulib:
12 This function dereferences too much memory on some platforms:
13 glibc 2.10 on x86_64, IA-64; glibc 2.11 on Alpha, AIX 7.2.
15 This function returns NULL if the character argument is not in the range
16 of an @code{unsigned char} on some platforms:
20 Portability problems not fixed by Gnulib: