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d="scan'208";a="112968613" From: Anthony PERARD To: CC: Anthony PERARD , Jason Andryuk , Andrew Cooper , "George Dunlap" , Jan Beulich , "Julien Grall" , Stefano Stabellini , Wei Liu Subject: [XEN PATCH 2/3] build: evaluate XEN_BUILD_* and XEN_DOMAIN on first use Date: Wed, 21 Jun 2023 17:19:58 +0100 Message-ID: <20230621161959.1061178-3-anthony.perard@citrix.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230621161959.1061178-1-anthony.perard@citrix.com> References: <20230621161959.1061178-1-anthony.perard@citrix.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1687364460480100005 Content-Type: text/plain; charset="utf-8" With GNU make 4.4, the number of execution of the command present in these $(shell ) increased greatly. This is probably because as of make 4.4, exported variable are also added to the environment of $(shell ) construct. Also, `make -d` shows a lot of these: Makefile:15: not recursively expanding XEN_BUILD_DATE to export to shel= l function Makefile:16: not recursively expanding XEN_BUILD_TIME to export to shel= l function Makefile:17: not recursively expanding XEN_BUILD_HOST to export to shel= l function Makefile:14: not recursively expanding XEN_DOMAIN to export to shell fu= nction So, to avoid having these command been run more than necessery, we will use a construct to evaluate on first use. Reported-by: Jason Andryuk Signed-off-by: Anthony PERARD --- xen/Makefile | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/xen/Makefile b/xen/Makefile index 9631e45cfb9b..b58c2a7f4539 100644 --- a/xen/Makefile +++ b/xen/Makefile @@ -11,10 +11,10 @@ export XEN_FULLVERSION =3D $(XEN_VERSION).$(XEN_SUBVE= RSION)$(XEN_EXTRAVERSION) -include xen-version =20 export XEN_WHOAMI ?=3D $(USER) -export XEN_DOMAIN ?=3D $(shell ([ -x /bin/dnsdomainname ] && /bin/dnsdomai= nname) || ([ -x /bin/domainname ] && /bin/domainname || echo [unknown])) -export XEN_BUILD_DATE ?=3D $(shell LC_ALL=3DC date) -export XEN_BUILD_TIME ?=3D $(shell LC_ALL=3DC date +%T) -export XEN_BUILD_HOST ?=3D $(shell hostname) +export XEN_DOMAIN ?=3D $(eval XEN_DOMAIN :=3D $(shell ([ -x /bin/dnsdomain= name ] && /bin/dnsdomainname) || ([ -x /bin/domainname ] && /bin/domainname= || echo [unknown])))$(XEN_DOMAIN) +export XEN_BUILD_DATE ?=3D $(eval XEN_BUILD_DATE :=3D $(shell LC_ALL=3DC d= ate))$(XEN_BUILD_DATE) +export XEN_BUILD_TIME ?=3D $(eval XEN_BUILD_TIME :=3D $(shell LC_ALL=3DC d= ate +%T))$(XEN_BUILD_TIME) +export XEN_BUILD_HOST ?=3D $(eval XEN_BUILD_HOST :=3D $(shell hostname))$(= XEN_BUILD_HOST) =20 # Best effort attempt to find a python interpreter, defaulting to Python 3= if # available. Fall back to just `python` if `which` is nowhere to be found. --=20 Anthony PERARD