Debian Bug report logs - #1003802
upb: reproducible-builds: BuildId differences triggered by RPATH

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Vagrant Cascadian <vagrant@reproducible-builds.org>

To: submit@bugs.debian.org

Subject: upb: reproducible-builds: BuildId differences triggered by RPATH

Date: Sat, 15 Jan 2022 15:46:37 -0800

[Message part 1 (text/plain, inline)]

Source: upb
Severity: normal
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: buildpath
X-Debbugs-Cc: reproducible-bugs@lists.alioth.debian.org

The RPATH contains the build path resulting in different buildid:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/upb.html

The attached patch to debian/rules passes
-DCMAKE_BUILD_RPATH_USE_ORIGIN=ON via a dh_auto_configure override,
which should use a relative path for RPATH.

Alternately, updating the packaging to debhelper compat level 14 should
fix this, although it is currently an experimental compat level.


With this patch applied, upb should build reproducibly on
tests.reproducible-builds.org!


Thanks for maintaining upb!


live well,
  vagrant

[0001-debian-rules-Pass-DCMAKE_BUILD_RPATH_USE_ORIGIN-ON-v.patch (text/x-diff, inline)]

From 19d90874187bb3cfc9bc41f68f085d587fd6d01f Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Sat, 15 Jan 2022 23:43:37 +0000
Subject: [PATCH] debian/rules: Pass -DCMAKE_BUILD_RPATH_USE_ORIGIN=ON via
 dh_auto_configure override.

This avoids embedding the full path in RPATH, which triggers BuildId
differences.

https://tests.reproducible-builds.org/debian/issues/unstable/cmake_rpath_contains_build_path_issue.html
---
 debian/rules | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/debian/rules b/debian/rules
index 10c5c7f..6aab9d8 100755
--- a/debian/rules
+++ b/debian/rules
@@ -6,7 +6,7 @@
 
 
 override_dh_auto_configure:
-	dh_auto_configure -- -DBUILD_SHARED_LIBS:BOOL=ON
+	dh_auto_configure -- -DBUILD_SHARED_LIBS:BOOL=ON -DCMAKE_BUILD_RPATH_USE_ORIGIN=ON
 
 %:
 	dh $@
-- 
2.34.1

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