Date: Mon, 05 Sep 2022 12:27:02 +0200 From: Alexander Leidinger <Alexander@leidinger.net> To: freebsd-emulation@freebsd.org Subject: Re: FreeBSD Port: emulators/linux_base-c7 Message-ID: <20220905122702.Horde.IllUrUMSxQN1IySIR4Ir2yR@webmail.leidinger.net> In-Reply-To: <37fbc957-c034-021f-e6cc-fef12cbac6d7@yahoo.com> References: <2072052490.883976.1661779180805.ref@mail.yahoo.com> <2072052490.883976.1661779180805@mail.yahoo.com> <7584B833-8829-41B3-9039-3E89FA5DCB0C@punkt.de> <37fbc957-c034-021f-e6cc-fef12cbac6d7@yahoo.com>
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[-- Attachment #1 --] Quoting Zeus Odin <zeus.odin@yahoo.com> (from Mon, 29 Aug 2022 09:48:48 -0400): > I have a multi-boot system with Arch Linux, FreeBSD, OS X, and > Windoze. Arch Linux kernel version is up to 5.19.2. Should that > affect our decision? > > [zeus@olympus ~]$ uname -a > Linux olympus.gods.org 5.19.2-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 17 > Aug 2022 13:48:51 +0000 x86_64 GNU/Linux > [zeus@olympus ~]$ uname -srm > Linux 5.19.2-arch1-1 x86_64 > > Will look at sysctl compat.linux.osrelease. Could someone give any > direction in rebuilding my base-c7 or perhaps I can create base-c8. > Thanks. If you want to add a new linux_base port, the following links will provide helpful info to understand what is involved and what shall or shall not be in a linux_base port: https://www.leidinger.net/blog/2010/09/28/the-freebsd-linuxulator-explained-for-users/ https://www.leidinger.net/blog/2011/08/29/howto-create-a-new-linux_base-port/ https://www.leidinger.net/blog/2011/09/01/howto-add-linux-infrastructure-ports-for-a-new-linux_base-port/ Increasing the linux version string (compat.linux.osrelease) may have implications. Linux software may use that to enable certain features of the software which relies on kernel behavior or linux syscalls. If you change that, it may cause console messages about unimplemented syscalls. If you are lucky, you / your software doesn't really need the features of the kernel. Even the current version string is "lying". We do not support all the features of the announced linux version. But for the linux programs in ports it is good enough and some checks about the kernel version are overly restrictive in some linux programs / libraries. Note, there is no "linux compat kernel" to recompile from source. The linuxolator is not an emulator, it is a compatibility shim (= it translates from linux syscalls to FreeBSD syscalls = some are the same and no translation is needed, and some are a little bit different and need only a little mapping between numbers or the data-layout). So if your software complains about a missing syscall (or respectively the kernel tells about unimplemented syscalls in the console), it means you can not take some stuff from linux and run it, it means some FreeBSD code needs to be written to make it work. Bye, Alexander. -- http://www.Leidinger.net Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF http://www.FreeBSD.org netchild@FreeBSD.org : PGP 0x8F31830F9F2772BF [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIzBAABCAAdFiEER9UlYXp1PSd08nWXEg2wmwP42IYFAmMVzvYACgkQEg2wmwP4 2IbP8A//WPXkNBLFoRn/7iPD4MeXA454rESDWEF04Mu/4K/GJOCkt2Iba7SwN2HX O0rHLGm9ZW6tA7dx9kMFkuaRugAnesnvDmB7BhisWpCQHSOMnOIZ7QrwT1kq6m1k dGfzHP3Ay+l/natnSjSSAB3WVuekBDn5/hQ5E2SG5jFQoyVrB8MaioFhK1nqiuia V9agWh4zJwuDLeBqqlnnFoUr0lb4r0H1lisalxrxGcdynxSmINFjFfL+hrMzXho8 k6rrGFpmLXjzeYWs5psMVAsLkcTRwnKwVms0hblcvT5Mgw9o6yBp1HxoL5YFLC1v d3W63BkvaI+qRjL50Ym9spluKblGUvbfZK5/mZHbvtJdKjISGPpa3NU1YmPtQtdX 9cDTWJvB/5tXkyItsQ5szfq9U3e3uecGqjji+2qFgarfTVKpQ4gSKiHcoDfL/6Rp FUW/ogRQVzCi1mfDYDAEOc2Qm49IABY5pRzW8uqqK8e0wgd9NsA2jrxBGiSv33Ak oH8S+hqy0Lbngc/b40uT0jvoZc7ZzO7YfKmGRzAEGtJqRVSzbslZlEtQH0ai6792 RmCmg24+RQ065EKVnxHyWm4srWq7NHrgDx2dmWyBJApI22dPOEGDe0QH2BaUPfsI kM9vg9FAgi0XH9pfE5mQqrVjisupCFQR9uUlkgZbNB9ftfD+GEU= =aLoQ -----END PGP SIGNATURE-----help
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