[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen stable-4.17] build: evaluate XEN_BUILD_* and XEN_DOMAIN immediately
commit a1f68fb56710c507f9c1ec8e8d784f5b1e4088f1 Author: Anthony PERARD <anthony.perard@xxxxxxxxxx> AuthorDate: Mon Jul 31 15:02:18 2023 +0200 Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> CommitDate: Tue Aug 22 13:43:05 2023 +0100 build: evaluate XEN_BUILD_* and XEN_DOMAIN immediately 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 shell function Makefile:16: not recursively expanding XEN_BUILD_TIME to export to shell function Makefile:17: not recursively expanding XEN_BUILD_HOST to export to shell function Makefile:14: not recursively expanding XEN_DOMAIN to export to shell function So to avoid having these command been run more than necessary, we will replace ?= by an equivalent but with immediate expansion. Reported-by: Jason Andryuk <jandryuk@xxxxxxxxx> Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx> Tested-by: Jason Andryuk <jandryuk@xxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> (cherry picked from commit 0c594c1b57ee2ecec5f70826c53a2cf02a9c2acb) --- xen/Makefile | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/xen/Makefile b/xen/Makefile index 1a3b9a081f..7bb9de7bdc 100644 --- a/xen/Makefile +++ b/xen/Makefile @@ -11,10 +11,18 @@ export XEN_FULLVERSION = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION) -include xen-version export XEN_WHOAMI ?= $(USER) -export XEN_DOMAIN ?= $(shell ([ -x /bin/dnsdomainname ] && /bin/dnsdomainname) || ([ -x /bin/domainname ] && /bin/domainname || echo [unknown])) -export XEN_BUILD_DATE ?= $(shell LC_ALL=C date) -export XEN_BUILD_TIME ?= $(shell LC_ALL=C date +%T) -export XEN_BUILD_HOST ?= $(shell hostname) +ifeq ($(origin XEN_DOMAIN), undefined) +export XEN_DOMAIN := $(shell ([ -x /bin/dnsdomainname ] && /bin/dnsdomainname) || ([ -x /bin/domainname ] && /bin/domainname || echo [unknown])) +endif +ifeq ($(origin XEN_BUILD_DATE), undefined) +export XEN_BUILD_DATE := $(shell LC_ALL=C date) +endif +ifeq ($(origin XEN_BUILD_TIME), undefined) +export XEN_BUILD_TIME := $(shell LC_ALL=C date +%T) +endif +ifeq ($(origin XEN_BUILD_HOST), undefined) +export XEN_BUILD_HOST := $(shell hostname) +endif # 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. -- generated by git-patchbot for /home/xen/git/xen.git#stable-4.17
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