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([2001:8b0:aba:5f3c:9a5c:ae3c:1b90:53c1]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42138c41becsm79594215e9.30.2024.06.03.14.22.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jun 2024 14:22:07 -0700 (PDT) Message-ID: <648acd46523f9be85df778aa235d082312ead1ff.camel@linuxfoundation.org> Subject: Re: [oe-core] [RFC] meson.bbclass: pkg-config vs pkgconf From: Richard Purdie To: Randolph Sapp , alex.kanavin@gmail.com, openembedded-core@lists.openembedded.org, Ryan Eatmon , Denys Dmytriyenko , cordlandwehr@kde.org, "alexandre.belloni@bootlin.com" Date: Mon, 03 Jun 2024 22:22:03 +0100 In-Reply-To: References: Autocrypt: addr=richard.purdie@linuxfoundation.org; prefer-encrypt=mutual; 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YNvg== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.0-1 MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 03 Jun 2024 21:22:16 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/200281 On Mon, 2024-06-03 at 13:02 -0500, Randolph Sapp wrote: > Forgive my ignorance, but is there any particular reason why pkg- > config is preferred over pkgconf for meson related recipes? Yes, as to try and mix both pkg-config and pkgconf would be a path to madness. > It seems the two treat the usage of the PKG_CONFIG_SYSROOT_DIR > variable differently, resulting in issues when build scripts > attempting to use package config variables directly. Right, this is basically the problem. We have a long history of using pkg-config, we worked with upstream to merge sysroot support and it is the standard we built around. pkgconf then came along and decided it would be a great idea to have some slightly different behaviour. We did originally plan to have a switchable virtual/ provider but due to the differences in behaviour it doesn't work. Things are bad enough that there are two standards. Saying "if building with meson, it behaves differently again" would be a nightmare. I have been asked to switch everything to pkgconf however I suspect that would also involve carrying patches and would end up as ton of work to be incompatible with a different set of software. I'm therefore not keen on that either. > If there's not an explicit reason we're preferring pkg-config, would=20 > anyone be opposed to switching it out for pkgconf for meson related=20 > packages? Of course, with a note about this behavior discrepancy. It=20 > would reduce these Yocto specific patches and align meson behavior > with distros that currently default to pkgconf. Personally, I think it would just confuse things even more. xcb-proto might get used by meson or non-meson software. Mesa might get used by either too. Keeping it simple and saying "pkg-config behaviour" everywhere is simpler IMO. Cheers, Richard