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From <https://github.com/bmwiedemann/psm/commit/98acae1a6f2c9b2e6014eac4070a817c9d0fd8a2>.
From 98acae1a6f2c9b2e6014eac4070a817c9d0fd8a2 Mon Sep 17 00:00:00 2001
From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
Date: Sun, 23 Jul 2017 07:02:28 +0200
Subject: [PATCH] Allow to override build date
in order to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.
Also uses UTC to be independent of timezone settings.
---
Makefile | 2 +-
ipath/Makefile | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
index d79c4bd..99406ef 100644
--- a/Makefile
+++ b/Makefile
@@ -270,7 +270,7 @@ ${TARGLIB}.so.${MAJOR}: ${TARGLIB}.so.${MAJOR}.${MINOR}
# file around. Generate it such that the ident command can find it
# and strings -a | grep InfiniPath does a reasonable job as well.
${TARGLIB}.so.${MAJOR}.${MINOR}: ${${TARGLIB}-objs}
- date +'char psmi_infinipath_revision[] ="$$""Date: %F %R ${rpm_extra_description}InfiniPath $$";' > ${lib_build_dir}/_revision.c
+ date -u -d@$${SOURCE_DATE_EPOCH:-$$(date +%s)} +'char psmi_infinipath_revision[] ="$$""Date: %F %R ${rpm_extra_description}InfiniPath $$";' > ${lib_build_dir}/_revision.c
$(CC) -c $(BASECFLAGS) $(INCLUDES) _revision.c -o _revision.o
$(CC) $(LDFLAGS) -o $@ -Wl,-soname=${TARGLIB}.so.${MAJOR} -shared -Wl,--unique='*fastpath*' \
${${TARGLIB}-objs} _revision.o -L$(build_dir)/ipath $(LDLIBS)
diff --git a/ipath/Makefile b/ipath/Makefile
index 8c2cc6e..73abd6f 100644
--- a/ipath/Makefile
+++ b/ipath/Makefile
@@ -70,7 +70,7 @@ ${TARGLIB}.so.${MAJOR}: ${TARGLIB}.so.${MAJOR}.${MINOR}
# file around. Generate it such that the ident command can find it
# and strings -a | grep InfiniPath does a reasonable job as well.
${TARGLIB}.so.${MAJOR}.${MINOR}: ${${TARGLIB}-objs}
- date +'static __attribute__ ((unused)) char __psc_infinipath_revision[] ="$$""Date: %F %R ${rpm_extra_description}InfiniPath $$";' > _revision.c
+ date -u -d@$${SOURCE_DATE_EPOCH:-$$(date +%s)} +'static __attribute__ ((unused)) char __psc_infinipath_revision[] ="$$""Date: %F %R ${rpm_extra_description}InfiniPath $$";' > _revision.c
$(CC) -c $(BASECFLAGS) $(INCLUDES) _revision.c -o _revision.o
$(CC) -o $@ -Wl,-soname=${TARGLIB}.so.${MAJOR} -shared \
-Wl,--unique='*fastpath*' \
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