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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
Date: Thu, 07 Jan 2021 13:32:26 +0000 [thread overview]
Message-ID: <bug-98414-4-7VhsVBCSSz@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-98414-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #9)
> (In reply to Jakub Jelinek from comment #8)
> > I don't. LIBUBSAN_SPEC comes from gcc.c, while the libstdc++ stuff comes
> > from cp/g++spec.c and the ordering between the two is hard to achieve, plus
> > it is unclear if we shouldn't for -static-libubsan instead just add another
> > -lstdc++ copy (but one honoring -static-libstdc++).
>
> Hm, and what about something like that:
>
> diff --git a/config/bootstrap-ubsan.mk b/config/bootstrap-ubsan.mk
> index 1d85fe1c836..b2a474ae158 100644
> --- a/config/bootstrap-ubsan.mk
> +++ b/config/bootstrap-ubsan.mk
> @@ -2,7 +2,7 @@
>
> STAGE2_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP
> STAGE3_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP
> -POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan
> -DUBSAN_BOOTSTRAP \
> +POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -lstdc++
> -DUBSAN_BOOTSTRAP \
> -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ \
> -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/ \
> -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/.libs
That's not going to work:
./xgcc -B./ -B/usr/local/x86_64-pc-linux-gnu/bin/ -isystem
/usr/local/x86_64-pc-linux-gnu/include -isystem
/usr/local/x86_64-pc-linux-gnu/sys-include
-L/home/mliska/Programming/gcc/objdir/gcc/../ld -xc++ -nostdinc /dev/null -S -o
/dev/null -fself-test=../../gcc/testsuite/selftests
./cc1./cc1plus: : /usr/lib64/libstdc++.so.6/usr/lib64/libstdc++.so.6: : version
`GLIBCXX_3.4.29' not found (required by ./cc1)version `GLIBCXX_3.4.29' not
found (required by ./cc1plus)
leaving to Nathan.
next prev parent reply other threads:[~2021-01-07 13:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-21 15:22 [Bug bootstrap/98414] New: [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' marxin at gcc dot gnu.org
2020-12-21 15:23 ` [Bug bootstrap/98414] " marxin at gcc dot gnu.org
2021-01-05 9:37 ` rguenth at gcc dot gnu.org
2021-01-05 10:37 ` marxin at gcc dot gnu.org
2021-01-05 12:40 ` [Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a marxin at gcc dot gnu.org
2021-01-05 13:44 ` nathan at gcc dot gnu.org
2021-01-05 13:51 ` jakub at gcc dot gnu.org
2021-01-05 14:08 ` marxin at gcc dot gnu.org
2021-01-05 14:10 ` marxin at gcc dot gnu.org
2021-01-05 14:14 ` jakub at gcc dot gnu.org
2021-01-05 14:24 ` marxin at gcc dot gnu.org
2021-01-07 13:32 ` marxin at gcc dot gnu.org [this message]
2021-01-11 9:54 ` marxin at gcc dot gnu.org
2021-01-11 9:59 ` marxin at gcc dot gnu.org
2021-01-11 10:02 ` jakub at gcc dot gnu.org
2021-01-11 10:06 ` marxin at gcc dot gnu.org
2021-01-11 10:22 ` marxin at gcc dot gnu.org
2021-01-11 10:48 ` marxin at gcc dot gnu.org
2021-01-11 12:55 ` nathan at gcc dot gnu.org
2021-01-12 18:33 ` nathan at gcc dot gnu.org
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