git: e179ee000ef2 - stable/14 - loader: Add WITH/WITHOUT_LOADER_PXEBOOT build option
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Date: Tue, 13 Aug 2024 17:31:40 UTC
The branch stable/14 has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=e179ee000ef2731a7baa6edc32ed8bfcca751f8b commit e179ee000ef2731a7baa6edc32ed8bfcca751f8b Author: Warner Losh <imp@FreeBSD.org> AuthorDate: 2024-08-05 21:19:21 +0000 Commit: Warner Losh <imp@FreeBSD.org> CommitDate: 2024-08-13 17:31:38 +0000 loader: Add WITH/WITHOUT_LOADER_PXEBOOT build option Make it possible to disable pxeboot. This loader will fail to build when it's too large. When /boot/loader needs to be larger like that, this options will disable a component whose build will fail. It is an explicit option rather than implicit when things are too large to force the user to make the explicit tradeoffs rather than wonder why they have a stale pxeboot or other odd failure mode. MFC After: 3 days Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D46212 (cherry picked from commit 20d35d5817851df3a6d20e75df2e14a192b94940) --- share/mk/src.opts.mk | 1 + stand/i386/Makefile | 2 +- tools/build/options/WITHOUT_LOADER_PXEBOOT | 10 ++++++++++ tools/build/options/WITH_LOADER_PXEBOOT | 25 +++++++++++++++++++++++++ 4 files changed, 37 insertions(+), 1 deletion(-) diff --git a/share/mk/src.opts.mk b/share/mk/src.opts.mk index 788c6a9b956f..3ff71df3e0da 100644 --- a/share/mk/src.opts.mk +++ b/share/mk/src.opts.mk @@ -132,6 +132,7 @@ __DEFAULT_YES_OPTIONS = \ LOADER_KBOOT \ LOADER_LUA \ LOADER_OFW \ + LOADER_PXEBOOT \ LOADER_UBOOT \ LOCALES \ LOCATE \ diff --git a/stand/i386/Makefile b/stand/i386/Makefile index 883cd4a556bb..5e52b1e12c30 100644 --- a/stand/i386/Makefile +++ b/stand/i386/Makefile @@ -17,7 +17,7 @@ SUBDIR.${MK_LOADER_LUA}+= loader_lua SUBDIR.yes+= loader_simp # special boot programs, 'self-extracting boot2+loader' -SUBDIR.yes+= pxeldr +SUBDIR.${MK_LOADER_PXEBOOT}+= pxeldr SUBDIR.${MK_LOADER_ZFS}+= zfsboot gptzfsboot diff --git a/tools/build/options/WITHOUT_LOADER_PXEBOOT b/tools/build/options/WITHOUT_LOADER_PXEBOOT new file mode 100644 index 000000000000..e6b09381884e --- /dev/null +++ b/tools/build/options/WITHOUT_LOADER_PXEBOOT @@ -0,0 +1,10 @@ +Do not build pxeboot on i386/amd64. +When the pxeboot is too large, or unneeded, it may be disabled with this option. +See +.Va WITH_LOADER_PXEBOOT +for how to adjust the defaults when you need both a larger +.Pa /boot/loader +and +.Pa /boot/pxeboot +.Pp +This option only has an effect on x86. diff --git a/tools/build/options/WITH_LOADER_PXEBOOT b/tools/build/options/WITH_LOADER_PXEBOOT new file mode 100644 index 000000000000..01d4a0b86a66 --- /dev/null +++ b/tools/build/options/WITH_LOADER_PXEBOOT @@ -0,0 +1,25 @@ +Build pxeboot on i386/amd64. +The PXE Boot loader package needs more space than we may have in the boot loader. +If you need to increase +.Va LOADERSIZE +beyond 500000, then building +.Xr pxeboot 8 +will fail. +To allow a larger +.Va LOADERSIZE +for some environments, it may be necessary to disable pxeboot builds or adjust +its defaults. +You can set the default loader for pxeboot to use independently of the system +default by setting +.Va PXEBOOT_DEFAULT_INTERP +to one of +.Dq lua , +.Dq 4th , +or +.Dq simp . +The limit on the size of the loader used for +.Xr pxeboot 8 +can be set independently with +.Va PXEBOOTSIZE . +.Pp +This option only has an effect on x86.