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Date: Wed, 7 Dec 2022 13:40:58 +0100
To: cygwin AT cygwin DOT com
Subject: Re: gcc -pg broken after cygwin update?
Message-ID: <Y5CJ2puxN+/Reahf@calimero.vinschen.de>
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Daniel Abrahamsson <daniel DOT abrahamsson AT prover DOT com>
References: <AS8PR08MB6936BAD1D7274720E4449505E91A9 AT AS8PR08MB6936 DOT eurprd08 DOT prod DOT outlook DOT com>
<Y5B+DvKl+fzjtZTk AT calimero DOT vinschen DOT de>
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From: Corinna Vinschen via Cygwin <cygwin AT cygwin DOT com>
Reply-To: cygwin AT cygwin DOT com
Cc: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>,
Daniel Abrahamsson <daniel DOT abrahamsson AT prover DOT com>
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On Dec 7 12:50, Corinna Vinschen via Cygwin wrote:
> On Dec 7 08:58, Daniel Abrahamsson via Cygwin wrote:
> > Hi,
> >
> > This morning I updated cygwin, and after that gcc started producing errors like this:
> >
> > > gcc -Wall -Wextra -Werror -pedantic -Wno-unused-parameter -g -pg -DVERBOSE -c -o ../obj/<somefile>.o <somefile>.c
> > > gcc -o ../bin/<mybin> ../obj/<somefile>.o -pg
> > > /usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld: ../obj/<somefile>.o: in function `exit_eval_failure':
> > /home/daab/dev/someproj/src/<somefile>.c:17: undefined reference to `__fentry__'
> >
> > If I drop the "pg" flags from the compilation and linking stages, everything works.
> >
> > I typically update cygwin packages once per week, but now it has been
> > maybe a month since I last updated. As far as I can tell from the
> > cygwin-announce archives, there has not been any gcc updates in that
> > period, but I do note that cygwin itself has been updated. Could that
> > be related?
>
> Thanks for the report.
>
> This is a dumb bug I introduced into the build system in 3.4.0. I fixed
> that in the git repo, but the automated build of the matching test
> release cygwin-3.5.0-0.17.g95f5b0a62036 is currently not building due to
> some hiccup on cygwin.com. I'll send a new mail as soon as this is
> fixed and you can test it (provided you run at least Windows 8.1).
Automated builds have been picked up again and the Cygwin test package
3.5.0-0.17.g95f5b0a62036 should be available later today. You can
install it using setup.exe, just like any other test release.
Don't forget to install the matching cygwin-devel package, too, that's
the one containing the library libgmon.a, which is what gets linked in
with `gcc -pg'.
Thanks,
Corinna
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