https://sourceware.org/bugzilla/show_bug.cgi?id=23466
Bug ID: 23466
Summary: Issues with Windows reproducible builds starting with
commit 13e570f80cbfb299a8858ce6830e91a6cb40ab7b
Product: binutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: boklm at torproject dot org
Target Milestone: ---
We are building Tor Browser for Windows using binutils and mingw-w64. We are
doing reproducible builds (http://reproducible-builds.org/) and with binutils
2.25 and later versions we have issues to reproduce our builds. After
git-bisecting, we start seeing this issue with commit
13e570f80cbfb299a8858ce6830e91a6cb40ab7b. We are currently using binutils
2.26.1 with a patch reverting 13e570f80cbfb299a8858ce6830e91a6cb40ab7b, as the
commit cannot be easily reverted on later versions.
When running objdump -x on 2 builds of the same dll file, we have this diff
(followed by many other reloc lines):
2,3c2,3
< 1/libEGL.dll: file format pei-i386
< 1/libEGL.dll
---
> 2/libEGL.dll: file format pei-i386
> 2/libEGL.dll
39c39
< CheckSum 003422cf
---
> CheckSum 00342445
55c55
< Entry 5 0032c000 00019b70 Base Relocation Directory [.reloc]
---
> Entry 5 0032c000 00019b74 Base Relocation Directory [.reloc]
27642,27649c27642,27649
< reloc 27130 offset cc3 [30b13cf4] HIGHLOW
< reloc 27131 offset cd0 [30b13d01] HIGHLOW
< reloc 27132 offset cd7 [30b13d08] HIGHLOW
< reloc 27133 offset d81 [30b13db2] HIGHLOW
< reloc 27134 offset dd2 [30b13e03] HIGHLOW
< reloc 27135 offset dd9 [30b13e0a] HIGHLOW
< reloc 27136 offset de0 [30b13e11] HIGHLOW
< reloc 27137 offset e83 [30b13eb4] HIGHLOW
---
> reloc 27130 offset cc2 [30b13cf3] HIGHLOW
> reloc 27131 offset cc9 [30b13cfa] HIGHLOW
> reloc 27132 offset cd0 [30b13d01] HIGHLOW
> reloc 27133 offset d73 [30b13da4] HIGHLOW
> reloc 27134 offset dc3 [30b13df4] HIGHLOW
> reloc 27135 offset dd0 [30b13e01] HIGHLOW
> reloc 27136 offset dd7 [30b13e08] HIGHLOW
> reloc 27137 offset e81 [30b13eb2] HIGHLOW
30163,30166c30163,30166
< reloc 29656 offset d2f [30b13d60] HIGHLOW
< reloc 29657 offset d42 [30b13d73] HIGHLOW
< reloc 29658 offset dbf [30b13df0] HIGHLOW
< reloc 29659 offset dd2 [30b13e03] HIGHLOW
---
> reloc 29656 offset cff [30b13d30] HIGHLOW
> reloc 29657 offset d12 [30b13d43] HIGHLOW
> reloc 29658 offset d8f [30b13dc0] HIGHLOW
> reloc 29659 offset da2 [30b13dd3] HIGHLOW
36415,36416c36415,36416
< reloc 35916 offset dd2 [30b13e03] HIGHLOW
< reloc 35917 offset dda [30b13e0b] HIGHLOW
Our ticket where we discussed this issue:
https://trac.torproject.org/projects/tor/ticket/16472#comment:74
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