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From: Franz Fehringer <fehrin2@gmail.com>
Subject: Re: ioperm / iopl / pciutils
Date: Thu, 2 Feb 2023 08:33:27 +0100
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 <Y9je7wwRy25SPVJu@calimero.vinschen.de>
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Am 31.01.2023 um 10:27 schrieb Corinna Vinschen via Cygwin:
> On Jan 29 18:22, Franz Fehringer via Cygwin wrote:
>> Hi all,
>>
>> Is there any Cygwin package providing the iopl et al. routines?
>> Google uncovers an ioperm package but that seems to be nothing current.
>> My goal is to compile https://github.com/pciutils/pciutils with Cygwin.
> 
> Cygwin doesn't have any Linux-like or POSIX-like API (device names,
> ioctl's and whatnot) to access PCI directly.
> 
> 
> Corinna
> 

On https://github.com/pciutils/pciutils the claim is

In runs on the following systems:
	Linux		(via /sys/bus/pci, /proc/bus/pci or i386 ports)

and http://ftp.uni-kl.de/pub/windows/cygwin/release/ioperm/setup.hint says

# $Id: setup.hint,v 1.4 2003/01/31 14:58:56 telka Exp $

sdesc: "support for ioperm()/iopl() functions"
ldesc: "This package adds support for ioperm()/iopl() functions to Cygwin.
This support includes sys/io.h and sys/perm.h header files together
with development and runtime libraries."
category: Devel Libs System
requires: cygwin libpopt0

So there possibly was once iopl support?