[Bug bootstrap/63853] [5.0 Regression] The use of strchrnul breaks bootstrap on x86_64-apple-darwin14.

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63853

--- Comment #14 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Thanks for the commit. Any plan to take into account the Jakub's remarks in
comment 11?