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Date:	Wed, 7 Dec 2022 12:50:38 +0100
To:	cygwin AT cygwin DOT com
Subject:	Re: gcc -pg broken after cygwin update?
Message-ID:	<Y5B+DvKl+fzjtZTk@calimero.vinschen.de>
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	Daniel Abrahamsson <daniel DOT abrahamsson AT prover DOT com>
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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 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).


Thanks,
Corinna

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