[Bug target/78095] [7 Regression] valgrind build error on ppc64le

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78095

--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
At least it needs a big fat explanation in
https://gcc.gnu.org/gcc-7/changes.html