Date: Sat, 27 Jan 2024 17:42:05 -0800 From: "Simon J. Gerraty" <sjg@juniper.net> To: void <void@f-m.fm> Cc: <freebsd-current@FreeBSD.org>, <sjg@juniper.net> Subject: Re: meta mode Message-ID: <71141.1706406125@kaos.jnpr.net> In-Reply-To: <8c42cc06-d3de-432e-82ab-7fe040197223@app.fastmail.com> References: <8c42cc06-d3de-432e-82ab-7fe040197223@app.fastmail.com>
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> I use meta-mode in /etc/src-env.conf so that if (for example) a small > change in the kernel config is made, the machine doesn't take hours > recompiling. > But, from time to time, one might be required to make > cleanworld && make cleandir (to be sure) && make clean (to be *really* sure) Almost never (as Warner said). I have trees that go for years without ever being cleaned. Unless I'm collecting timing data for clean tree builds. If you use DIRDEPS_BUILD as well as META_MODE, there can be cases where you need the stage tree cleaned (staging is like auto-install to DESTDIR). The most common case is when a library has switched from staging its headers from $STAGE_ROOT/$MACHINE/usr/include to $STAGE_ROOT/common/usr/include (so they only get staged once), if you don't clean out $STAGE_ROOT/$MACHINE/usr/include, builds will continue to find headers there that should be found in $STAGE_ROOT/common/usr/include and thus revert Makefile.depend changes. We added a mechanism to allow triggering auto-clean of stage tree when such changes are made. --sjghelp
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