Accepting request 499887 from 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 (forwarded request 499876 from bmwiedemann)

OBS-URL: https://build.opensuse.org/request/show/499887
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/gzip?expand=0&rev=44

gzip.changes

@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+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
+
+- changing the way how gcc profiling is generating to have a reproducible
+  build
+
 -------------------------------------------------------------------
 Tue Apr 11 14:08:21 UTC 2017 - kstreitova@suse.com
 

gzip.spec

@@ -66,8 +66,8 @@ profile_gzip()
 {
   tmpfile=$(mktemp)
   trap "rm -f $tmpfile $tmpfile.gz" EXIT
-  tar -cf $tmpfile %{_prefix} || true
-  time ./gzip $tmpfile
+  xz -cd %{SOURCE0} > $tmpfile
+  time ./gzip < $tmpfile > $tmpfile.gz
   time ./gzip -d < $tmpfile.gz > /dev/null
 }
 %if %{do_profiling}