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Xen: improve build reproducibility

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Enable reproducible builds of the hypervisor binaries by defining
build variables and setting compiler flags to support this.

Signed-off-by: Christopher Clark <christopher.clark6@baesystems.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
This commit is contained in:
Christopher Clark 2018-08-12 18:55:26 -07:00 committed by Bruce Ashfield
parent f5f8849df6
commit 9ca16e1a6e
1 changed files with 27 additions and 0 deletions
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27
recipes-extended/xen/xen.inc
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@ -870,6 +870,24 @@ EXTRA_OEMAKE += "ETHERBOOT_ROMS=${STAGING_DIR_HOST}/usr/share/firmware/rtl8139.r
EXTRA_OEMAKE += "WGET=/bin/false" EXTRA_OEMAKE += "WGET=/bin/false"
EXTRA_OEMAKE += "GIT=/bin/false" EXTRA_OEMAKE += "GIT=/bin/false"
# Improve build reproducibility: provide values for build variables.
def get_build_time_vars(d):
source_date_epoch = d.getVar('SOURCE_DATE_EPOCH')
if source_date_epoch is not None:
import datetime
utc_datetime = datetime.datetime.utcfromtimestamp(float(source_date_epoch))
return " XEN_BUILD_DATE=" + utc_datetime.strftime("%Y-%m-%d") + \
" XEN_BUILD_TIME=" + utc_datetime.strftime("%H:%M:%S")
return ""
EXTRA_OEMAKE += "${@['', 'XEN_WHOAMI=${PF} XEN_DOMAIN=${DISTRO} XEN_BUILD_HOST=${PN}-buildhost'] \
[d.getVar('BUILD_REPRODUCIBLE_BINARIES') == '1']}${@get_build_time_vars(d)}"
# Improve build reproducibility: compiler flags to remove filesystem differences.
# Suppress __FILE__ via an alternative builtin.
CC += "${@['', '-gno-record-gcc-switches -Wno-builtin-macro-redefined -D__FILE__=__VERSION__ ' + \
'-fdebug-prefix-map=${WORKDIR}=${PN}'] \
[d.getVar('BUILD_REPRODUCIBLE_BINARIES') == '1']}"
# check for XSM in package config to allow XSM_ENABLE to be set # check for XSM in package config to allow XSM_ENABLE to be set
python () { python () {
pkgconfig = d.getVar('PACKAGECONFIG') pkgconfig = d.getVar('PACKAGECONFIG')
@ -889,6 +907,15 @@ do_post_patch() {
# libsystemd-daemon -> libsystemd for newer systemd versions # libsystemd-daemon -> libsystemd for newer systemd versions
sed -i 's#libsystemd-daemon#libsystemd#' ${S}/tools/configure sed -i 's#libsystemd-daemon#libsystemd#' ${S}/tools/configure
# Improve build reproducibility: disable insertion of the build timestamp
# into the x86 EFI hypervisor binary.
# binutils should allow a user-supplied timestamp or use SOURCE_DATE_EPOCH
# for PE but currently does not.
if [ "${BUILD_REPRODUCIBLE_BINARIES}" = "1" ] ; then
sed '/^EFI_LDFLAGS = /{a EFI_LDFLAGS += --no-insert-timestamp
}' -i "${S}/xen/arch/x86/Makefile"
fi
} }
addtask post_patch after do_patch before do_configure addtask post_patch after do_patch before do_configure