git: ffddfd3631de - stable/14 - release/Makefile.vm: Support read-only ports tree

The branch stable/14 has been updated by cperciva:

URL: https://cgit.FreeBSD.org/src/commit/?id=ffddfd3631de5b4104af5e0ee1331508ea2a46f3

commit ffddfd3631de5b4104af5e0ee1331508ea2a46f3
Author:     Colin Percival <cperciva@FreeBSD.org>
AuthorDate: 2024-04-11 16:24:59 +0000
Commit:     Colin Percival <cperciva@FreeBSD.org>
CommitDate: 2024-04-17 05:43:27 +0000

    release/Makefile.vm: Support read-only ports tree
    
    Build qemu (if needed) with WRKDIRPREFIX=/tmp/ports DISTDIR=/tmp/distfiles
    so that we can have a read-only /usr/ports and don't contaminate it.  This
    became an issue when I enabled parallel release building, since one image
    might be creating its ports.txz file at the same time as we're building
    qemu as a prerequisite for building another image.
    
    MFC after:      5 days
    
    (cherry picked from commit 6f454c211b295ad13e80fc5b858efc9bad33e33b)
---
 release/Makefile.vm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/release/Makefile.vm b/release/Makefile.vm
index a936e6cb98ca..54fee60b2e22 100644
--- a/release/Makefile.vm
+++ b/release/Makefile.vm
@@ -76,7 +76,10 @@ ${_V}!=	eval $$(awk '/^${_V}=/{print}' ${.CURDIR}/../sys/conf/newvers.sh); echo
 emulator-portinstall:
 .if !exists(/usr/local/bin/qemu-${TARGET_ARCH}-static)
 .if exists(${PORTSDIR}/emulators/qemu-user-static/Makefile)
-	env - UNAME_r=${UNAME_r} PATH=$$PATH make -C ${PORTSDIR}/emulators/qemu-user-static BATCH=1 all install clean
+	env - UNAME_r=${UNAME_r} PATH=$$PATH \
+	    make -C ${PORTSDIR}/emulators/qemu-user-static \
+	    BATCH=1 WRKDIRPREFIX=/tmp/ports DISTDIR=/tmp/distfiles \
+	    all install clean
 .else
 .if !exists(/usr/local/sbin/pkg-static)
 	env ASSUME_ALWAYS_YES=yes pkg bootstrap -y