Comment # 28 on bug 1040589 from Martin Li��ka

We've got a team meeting and we discuss the topic quite thoroughly.
There's an analysis why the mentioned packages have not reproducible builds:

1) GCC: it's using garbage collected memory and similar mechanisms that are
dependent on memory layout (ASLR, heap allocation). That makes it complicated
to achieve a reproducible builds.

2) Python: I haven't analyzed the package, but I would expect it's affected by
similar problem.

3) gzip - looks stable to me right now
4) xz - likewise
5) sed - analyzed here: https://bugzilla.suse.com/show_bug.cgi?id=1040589#c9
6) hello - the package looks stable
7) bash:

I did concat of gcov-dump of all gcda and gcno files (by adding --coverage):
$ find /var/tmp/ -name '*.gcda' 2>/dev/null | sort | xargs -L1 gcov-dump -l >
..

and using a simple script:
https://github.com/marxin/script-misc/blob/master/gcov-diff.py

$ ./gcov-diff.py /tmp/gcda1 /tmp/gcda2 /tmp/gcno1 | colordiff
Difference for fn 1039863413 (fmtumax fmtulong.c:84)
--- 
+++ 
@@ -1,6 +1,6 @@
     01a10000:  60:COUNTERS arcs 30 counts
                    0: 0 0 275415 91 0 0 0 0
-                   8: 198528 76887 12 184735 0 0 0 0
+                   8: 198528 76887 12 184812 0 0 0 0
                   16: 0 0 0 0 0 0 0 0
                   24: 0 0 0 0 0 91
     01a30000:   8:COUNTERS interval 4 counts

Difference for fn 1133735831 (mbschr mbschr.c:43)
--- 
+++ 
@@ -1,5 +1,5 @@
     01a10000:  24:COUNTERS arcs 12 counts
-                   0: 1720761 1105721 1105721 669139 1665477 667538 667538
667533
-                   8: 1035 6682747 668104 1987469
+                   0: 1720761 1105721 1105721 669139 1665499 667538 667538
667533
+                   8: 1035 6682747 668104 1987491
     01af0000:   2:COUNTERS time_profiler 1 counts
                    0: 38

Difference for fn 1191969440 (timeval_to_cpu timeval.c:73)
--- 
+++ 
@@ -1,6 +1,6 @@
     01a10000:  16:COUNTERS arcs 8 counts
                    0: 6 0 0 0 36 24 0 6
     01a70000:   6:COUNTERS single 3 counts
-                   0: 9 4 6
+                   0: 11 2 6
     01af0000:   2:COUNTERS time_profiler 1 counts
                    0: 265

Difference for fn 58810953 (make_word_flags make_cmd.c:102)
--- 
+++ 
@@ -1,5 +1,5 @@
     01a10000:  22:COUNTERS arcs 11 counts
-          %2