Accepting request 499876 from home:bmwiedemann:branches:Base:System

Make build reproducible in spite of gcc profile based optimizations (boo#1040589)

The previous version would create an unused tar file called 'd'
and use an empty tmpfile for training gzip profiles
though it did make builds reproducible, it would lose some optimizations

OBS-URL: https://build.opensuse.org/request/show/499876
OBS-URL: https://build.opensuse.org/package/show/Base:System/gzip?expand=0&rev=52

gzip.changes

@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed May 31 02:54:52 UTC 2017 - bwiedemann@suse.com
+
+- Make build reproducible in spite of gcc profile based optimizations
+  (boo#1040589)
+
 -------------------------------------------------------------------
 Tue May 30 09:59:59 UTC 2017 - src@posteo.de
 

gzip.spec

@@ -66,7 +66,7 @@ profile_gzip()
 {
   tmpfile=$(mktemp)
   trap "rm -f $tmpfile $tmpfile.gz" EXIT
-  tar -cfd %{SOURCE0} > $tmpfile || true
+  xz -cd %{SOURCE0} > $tmpfile
   time ./gzip < $tmpfile > $tmpfile.gz
   time ./gzip -d < $tmpfile.gz > /dev/null
 }