DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 62AD9kRF2479689
Authentication-Results: delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results: delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter: OpenDKIM Filter v2.11.0 delorie.com 62AD9kRF2479689
Authentication-Results: delorie.com;
	dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=yY1Xep4o
X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 65BDE4BA23D3
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1773148184;
	bh=vDaQASuYraEd7AmQaAElrhG9MxPkpLhLGVfZ018plkU=;
	h=Date:Subject:To:References:In-Reply-To:List-Id:List-Unsubscribe:
	 List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc:
	 From;
	b=yY1Xep4oB5SO8B44ulZCwv/+UZsBFVSPTI3VkUb7/GkM18NZ1a+vAViBfBq+oVNSy
	 lBfvKLpn4uNnjbm4wkMTObqnYPqPP2MYJY+WppKv+2drqpRpkYVjPA43bmG/Ee5dPq
	 217IzSFpcA2ybVqbogklulgHyDAiEXGNmOFRqzNU=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CC4134B9DB5D
ARC-Filter: OpenARC Filter v1.0.0 sourceware.org CC4134B9DB5D
ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1773148127; cv=none;
 b=LL1fzIA+9XEGLvteSTsaqu7KTg90wqHjtkqexT3av5yfTDL2+kuREFn/Ax5Rf8lrkD3CLbODdId12lZrFLqrlNQIw9S4ORu24LFoqmL1/2I6MZqQ2dHeiSWyOfRw0Oo/Po8WegHyBnCALOm8NoErboInAwSxtqDHWkScO3/0pbw=
ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key;
 t=1773148127; c=relaxed/simple;
 bh=Yoa6tTFkXDWRrDVCK7ODmXwwyu0HRNV0FONhYK1uCZk=;
 h=Message-ID:Date:MIME-Version:From:Subject:To:DKIM-Signature;
 b=N/gLHwiiTu3+xOAKEw4h/3SgwjhNW+kHF/VGdqUWgVPKM21KmnQCMg5jzsJnf2IJIerJ/Ht0cZNNVZeivgHCjFQEbGF5T6lWpoRkIH9ZJYF2lF7NB5KVnoUnnLRTw0XmTDa6tQXqJVqkmSVyME5VYzhiwsoMGk/ijePIzXAtdR4=
ARC-Authentication-Results: i=1; server2.sourceware.org
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CC4134B9DB5D
Message-ID: <3b1aa006-d7db-4e6d-8519-9eb86a9f29ec@SystematicSW.ab.ca>
Date: Tue, 10 Mar 2026 07:08:44 -0600
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: gcc hangs even on simple compile tasks
Content-Language: en-CA
To: General Cygwin discussions and problem reports <cygwin AT cygwin DOT com>
References: <bd747629-3616-43c9-b05c-65610dc49842 AT cartchunk DOT org>
 <TYWPR01MB8789FF4AF379C3E536EF8F9EC17BA AT TYWPR01MB8789 DOT jpnprd01 DOT prod DOT outlook DOT com>
Organization: Systematic Software
In-Reply-To: <TYWPR01MB8789FF4AF379C3E536EF8F9EC17BA@TYWPR01MB8789.jpnprd01.prod.outlook.com>
X-Stat-Signature: cg6tbejrmbb5aticrjpdh55f6rm1utcz
X-Rspamd-Server: rspamout04
X-Rspamd-Queue-Id: CD1A030
X-Session-Marker: 427269616E2E496E676C69734053797374656D6174696353572E61622E6361
X-Session-ID: U2FsdGVkX1/mah0vdDMlVgW8LNVnYQ9gBXRpz53Xmo8=
X-HE-Tag: 1773148125-224534
X-HE-Meta: U2FsdGVkX1/HBlim/ag7z+8wpb5OYCqH6wCSGg26PNykucKbNumXbCZzHu4Uk1SQiRa0fBfh/A/pGX8M03fB3FHxggzef0UbgqtsI6QLO830xX/M7RjGQGw3aE8WYDFXKJ3kDCJanKGlrYJabIrZKlcDJBfeJFeToBzcTznUkGj/xAXTfipd6vHwkp6+6HulzBXjDTizhoG4MnZTreNlJRCDZUxYCZYj584PRJ4IQtRNs3IiP8aN7djA8d+XPgj0r2avF+Q0vVL/EYivw0Zw3fYK7sl0choTxTA0/rm+mEw5VHd9xjjVJMRQRUT5mIeF22fMoqm2aXT+WaVk4sGWgo/z1zENTMu/jVZqpWCIuGEhT/Yz/7T7z5yQYJKBHvKGy6yycwYe7elcG+nIAQW4IQirEFaR6EY1pBjUec8poKX/AFooXIb1zu0nqRVFXykOB7WCunuKTtu1FhEf0X++4u+4Kvc1OZ1CcAvrstgssdg=
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.30
Precedence: list
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe: <https://cygwin.com/mailman/options/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Brian Inglis via Cygwin <cygwin AT cygwin DOT com>
Reply-To: General Cygwin discussions and problem reports <cygwin AT cygwin DOT com>
Cc: Brian Inglis <Brian DOT Inglis AT SystematicSW DOT ab DOT ca>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Errors-To: cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>
Content-Transfer-Encoding: 8bit
X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 62AD9kRF2479689

On 2026-03-06 17:29, Annihilannic via Cygwin wrote:
> On 07/03/2026 09:37, Dick Pierce via Cygwin wrote:
>> Starting the end of last week, gcc has started behaving badly. Whether I invoke
>> it from a makefile or directly from bash, almost ALL of the timer, it hangs
>> forever, and Task Manager shows cc1 as "running", but consuming no CPU as
>> far as I can tell. If I kill it through task manager, the prompt returns
>> in bash (or make dies with an "interrupted" error.

>> But I'm stumped.

> Smells like a hardware problem to me - I'd suggest testing it thoroughly with 
> memtest86 or similar.
> 
> Also run it through `strace -f gcc -o hello.exe hello.c` a few times and see if 
> it's sticking in the same spot every time (which would indicate software)?

Never blame hardware until you have eliminated the likelihood of BLODA (Big List 
Of Dodgy Apps <https://www.cygwin.com/acronyms/#BLODA>: FAQ 4.44. What 
applications have been found to interfere with Cygwin? 
<https://cygwin.com/faq/faq.html#faq.using.bloda>): poorly written employee 
monitoring and control software, often marketed as "End Point Protection", 
"Security", or AV products, which can not deal with, and must bypass interfering 
with emulators, like Cygwin or Git for Windows MSYS2.

Export CYGWIN=detect_bloda (BLODA detection code 
<https://cygwin.com/legacy-ml/cygwin/2012-02/msg00797.html>) and/or run gcc 
under strace 'strace -o gcc.strace gcc -o hello hello.c' to see if there are any 
non-Cygwin and non-Windows (may still be installed under /Windows/Systems32/) 
DLLs loaded.

If you can, bypass products interfering with Cygwin programs under its 
<CYGWIN_ROOT>, or <CYGWIN_ROOT>/*bin/..., <CYGWIN_ROOT>/lib/..., 
<CYGWIN_ROOT>/libexec/... paths.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple