On 10/28/22 12:59, John Baldwin wrote:
On 10/27/22 10:59 AM, Andrew Turner wrote:
The branch main has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=701ab6dba4a2232751cd91f79bfc1d8e96bf5316

commit 701ab6dba4a2232751cd91f79bfc1d8e96bf5316
Author:     Andrew Turner <and...@freebsd.org>
AuthorDate: 2022-10-27 17:01:44 +0000
Commit:     Andrew Turner <and...@freebsd.org>
CommitDate: 2022-10-27 17:59:33 +0000

     Stop building FDT-only modules in an ACPI only kernel
     When building a kernel without FDT these modules don't build. As they
     depend on FDT and don't work with ACPI disable them.
     Reviewed by:    imp, kevans
     Sponsored by:   The FreeBSD Foundation
     Differential Revision: https://reviews.freebsd.org/D37178

Hmm, the OPT_FDT handling seems a bit atypical.  Other optional components are tested for by ${KERN_OPTS:M<foo>} rather than empty(OPT_<foo>) under sys/modules.


Some time ago I experimented with trying to build a NOFDT kernel like this. I found that this type of construct worked well:

SUBDIR.${MK_FDT}= ${_allwinner} \
                  ${_if_cgem} \
                  ${_sdhci_fdt} \
                  ...

That is, use the existing SUBDIR.yes logic to conditionally exclude these already conditional subdirectories. It avoids multiple identical checks, whether you use ${KERN_OPTS:MFDT} or empty(OPT_FDT) forms. Something to consider.

Mitchell

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