[Xen-changelog] [xen master] use more fixed strings to build the hypervisor

[patchbot@xxxxxxx]

commit ac977f542b92790f87edabbb9b16b4c52a85ed98
Author:     Olaf Hering <olaf@xxxxxxxxx>
AuthorDate: Wed Jan 7 11:09:50 2015 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jan 7 11:09:50 2015 +0100

    use more fixed strings to build the hypervisor
    
    It should be possible to repeatedly build identical sources and get
    identical binaries, even on different hosts at different build times.
    This fails for xen.gz and xen.efi because current time and buildhost
    get included in the binaries.
    
    Provide variables XEN_BUILD_DATE, XEN_BUILD_TIME and XEN_BUILD_HOST
    which the build environment can set to fixed strings to get a
    reproducible build.
    
    Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 xen/Makefile |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/xen/Makefile b/xen/Makefile
index 52643e8..98ae2d0 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -8,6 +8,9 @@ export XEN_FULLVERSION   = 
$(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
 
 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)
 
 export BASEDIR := $(CURDIR)
 export XEN_ROOT := $(BASEDIR)/..
@@ -126,11 +129,11 @@ delete-unfresh-files:
 
 # compile.h contains dynamic build info. Rebuilt on every 'make' invocation.
 include/xen/compile.h: include/xen/compile.h.in .banner
-       @sed -e 's/@@date@@/$(shell LC_ALL=C date)/g' \
-           -e 's/@@time@@/$(shell LC_ALL=C date +%T)/g' \
+       @sed -e 's/@@date@@/$(XEN_BUILD_DATE)/g' \
+           -e 's/@@time@@/$(XEN_BUILD_TIME)/g' \
            -e 's/@@whoami@@/$(XEN_WHOAMI)/g' \
            -e 's/@@domain@@/$(XEN_DOMAIN)/g' \
-           -e 's/@@hostname@@/$(shell hostname)/g' \
+           -e 's/@@hostname@@/$(XEN_BUILD_HOST)/g' \
            -e 's!@@compiler@@!$(shell $(CC) $(CFLAGS) --version 2>&1 | head 
-1)!g' \
            -e 's/@@version@@/$(XEN_VERSION)/g' \
            -e 's/@@subversion@@/$(XEN_SUBVERSION)/g' \
--
generated by git-patchbot for /home/xen/git/xen.git#master

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