From: Jonathan Wakely <jwakely.gcc@gmail.com>
To: Gerald Pfeifer <gerald@pfeifer.com>
Cc: Andreas Tobler <andreast@freebsd.org>,
Lorenzo Salvadore <developer@lorenzosalvadore.it>,
"gcc@gcc.gnu.org" <gcc@gcc.gnu.org>
Subject: Re: GCC testing on FreeBSD
Date: Sun, 28 Apr 2024 17:17:18 +0100 [thread overview]
Message-ID: <CAH6eHdRsgJFLC+M6PZfEx8fp0ydErkcFe6egZKmPjHgEuCvsLw@mail.gmail.com> (raw)
In-Reply-To: <866dda5e-c983-ac16-de71-05b685536cd7@pfeifer.com>
[-- Attachment #1: Type: text/plain, Size: 3721 bytes --]
On Sun, 28 Apr 2024, 11:24 Gerald Pfeifer, <gerald@pfeifer.com> wrote:
> Hi Jonathan,
>
> On Fri, 26 Apr 2024, Jonathan Wakely wrote:
> > How are you testing on FreeBSD?
> >
> > When I build GCC trunk on FreeBSD 14.0 and try to run the libstdc++
> > testsuite it fails due to lots of these errors:
> >
> > Excess errors:
> > /usr/local/bin/ld: /tmp//ccev946q.o: relocation R_X86_64_32 against
> > symbol `_ZTIN10__cxxabiv115__forced_unwindE@@CXXABI_1.3.2' can not be
> > used when making a PDE object; recompile with -fPIE
> > /usr/local/bin/ld: failed to set dynamic section sizes: bad value
>
> my first reaction was to recommend using binutils instead of /usr/bin/ld
> which is LLD 16.0.6 or similar (since a while ago FreeBSD switched to that
> toolchain as part of the base system).
>
> My nightly tester has been using GNU ld since
>
> # 2012-03-11 Configure using --with-as=$localbase/bin/as and
> # --with-ld=$localbase/bin/ld on *.freebsd.org.
>
> in the script invoked by cron, even before FreeBSD made that switch.
>
> Seeing /usr/local/bin/ld in the error message it appears you are doing
> that already, though?
>
Yes, I'm using GNU ld.
On IRC Andreas suggested that also using GNU objdump would solve my issue,
but I haven't tried yet.
> > Which suggests that -fPIE is missing from the default test flags.
> >
> > Have you seen this? Do you do something locally to work around it?
>
> All I have in terms of adjustments to the FreeBSD systems I build on via
> that script are the following
>
> CONFIGUREFLAGS="--with-gmp=$LOCALBASE --with-as=$LOCALBASE/bin/as
> $CONFIGUREFLAGS"
> LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LOCALBASE/lib
> PATH=$LOCALBASE/bin:$PATH
>
> where LOCALBASE looks like it would be /usr/local in your case. Nothing
> explicit around PIE there.
>
> Looking at the logs of a serialized build I triggered manually where I
> remove the --with-ld configure option, I see
>
> checking linker PIE support with copy reloc... no
> checking for -fno-PIE option... yes
> checking for -no-pie option... yes
>
> and then build invocations like
>
> c++ -std=c++11 -fno-PIE -c ...
>
> during all-stage1-target-libgcc which ultimately fails with - mystery?! -
>
> ld: error: unable to find library -lc
> collect2: error: ld returned 1 exit status
> gmake[3]: *** [Makefile:1005: libgcc_s.so] Error 1
>
> (Disclaimer: all my tests on FreeBSD 13.2, not FreeBSD 14 as in your
> case.)
>
>
> Looking at the lang/gcc* ports that I maintained for two decades until
> Lorenzo (copied now) kindly took them over two years ago I see the
> following change among others for newer versions:
>
> % git show b6a5871a0cf40
> commit b6a5871a0cf40dfc194217704e2dc03e2e91fb62
> Author: Lorenzo Salvadore <salvadore@FreeBSD.org>
> Date: Fri Feb 3 20:12:49 2023 +0100
>
> lang/gcc10: Mark PIE_UNSAFE
>
> Building the port with WITH_PIE fails if the BOOTSTRAP option is
> enabled. Mark PIE_UNSAFE when this option is enabled until a better
> solution is found.
>
> PR: 268901
>
> where https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268901 is the PR
> referenced.
>
> PIE_UNSAFE=yes in a port's Makefile (the equivalent to a spec file in RPM
> land) is used as follows in ports/Mk/Features/pie.mk:
>
> . if !defined(PIE_UNSAFE)
> PIE_CFLAGS?= -fPIE -fPIC
> CFLAGS+= ${PIE_CFLAGS}
> CXXFLAGS+= ${PIE_CFLAGS}
> LDFLAGS+= -pie
> STATIC_PIE_ARGS+= -static-pie
> . endif
>
>
> You are not using the Ports Infrastructure, I believe, so the above does
> not directly apply, may provide some additional background, though?
>
>
> Hope this helps - and please chime in Lorenzo and Andreas!
>
> Gerald
>
prev parent reply other threads:[~2024-04-28 16:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-26 11:06 Jonathan Wakely
2024-04-28 10:24 ` Gerald Pfeifer
2024-04-28 10:32 ` Rainer Orth
2024-04-28 13:39 ` Lorenzo Salvadore
2024-04-28 17:19 ` Rainer Orth
2024-04-28 18:38 ` Lorenzo Salvadore
2024-04-29 12:21 ` Rainer Orth
2024-04-28 16:17 ` Jonathan Wakely [this message]
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