On Fri, Nov 29, 2013 at 11:22:00AM -0800, H.J. Lu wrote:
> On Mon, Nov 18, 2013 at 6:44 AM, Marek Polacek <pola...@redhat.com> wrote:
> > On Mon, Nov 18, 2013 at 02:51:41PM +0100, Jakub Jelinek wrote:
> >> On Wed, Nov 13, 2013 at 12:13:48AM +0100, Marek Polacek wrote:
> >> > --- gcc/config/bootstrap-ubsan.mk.mp 2013-11-12
> >> > 13:46:13.345182065 +0100
> >> > +++ gcc/config/bootstrap-ubsan.mk 2013-11-12 13:46:49.812314016 +0100
> >> > @@ -2,6 +2,6 @@
> >> >
> >> > STAGE2_CFLAGS += -fsanitize=undefined
> >> > STAGE3_CFLAGS += -fsanitize=undefined
> >> > -POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -lpthread \
> >> > +POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -lpthread
> >> > -ldl \
> >>
> >> Hopefully with my pending patch you can remove the -lpthread -ldl again,
> >> but
> >> ok for now.
> >
>
> You shouldn't use -ldl directly. Not all OSes have libdl. You
> should extract the libdl check from gcc/configure.ac and
> set LIBDL instead by changing gcc/Makefile.in
-static-libubsan should add all the libraries needed of libubsan.a by now,
so -lpthread -ldl should be just removed from POSTSTAGE1_LDFLAGS.
Jakub
