https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98921
--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> --- (In reply to Andreas Schwab from comment #2) > diff --git a/gcc/d/dmd/dmangle.c b/gcc/d/dmd/dmangle.c > index f6eee52afbf..73d9ac5367f 100644 > --- a/gcc/d/dmd/dmangle.c > +++ b/gcc/d/dmd/dmangle.c > @@ -822,7 +822,7 @@ public: > void visit(IntegerExp *e) > { > if ((sinteger_t)e->value < 0) > - buf->printf("N%lld", -e->value); > + buf->printf("N%llu", -e->value); > else > buf->printf("i%lld", e->value); > } Thanks! The upstream D implementation of the compiler adds a special formatter for printing of integers. I've tested that a backport of it on powerpc64le-linux and confirmed it fixes this pr.