[Bug other/78711] gcc-6.2.0:: libjavamath.so inconsistent gmp link

[edeveaud at pasteur dot fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78711

--- Comment #5 from Eric <edeveaud at pasteur dot fr> ---
(In reply to Andreas Schwab from comment #4)
> The target libraries must always be built against the libraries of the
> target system.  You have to populate the sysroot accordingly.

as during gcc build gmp is built vs the target system I'm compiling on  I still
don't understand.