Debian Bug report logs - #1011480
libxsettings-client: reproducible-builds: embedded build paths

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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: libxsettings-client: reproducible-builds: embedded build paths

Date: Mon, 23 May 2022 13:24:57 -0700

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

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

The build path is embedded in /usr/lib/libXsettings-client.so.0.0.0:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/diffoscope-results/libxsettings-client.html

  /build/1st/libxsettings-client-0.17/xsettings-client.c:340
  vs.
  /build/2/libxsettings-client-0.17/2nd/xsettings-client.c:340

The attached patch fixes this by setting -ffile-prefix-map in CFLAGS in
debian/rules, which avoids embedding the absolute build path.

Alternately, switching to use a newer debhelper compat level and the dh
build system would likely also fix this, as it includes -ffile-prefix-map
by default.


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


live well,
  vagrant

[0001-debian-rules-Pass-ffile-prefix-map-via-CFLAGS.patch (text/x-diff, inline)]

From d6c7a37cac9771a19cb4131d92970f5812e1cdce Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Mon, 23 May 2022 20:18:03 +0000
Subject: [PATCH] debian/rules: Pass -ffile-prefix-map via CFLAGS.

---
 debian/rules | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/debian/rules b/debian/rules
index 69c4f21..2ae7593 100755
--- a/debian/rules
+++ b/debian/rules
@@ -22,6 +22,9 @@ else
 	CFLAGS += -O2
 endif
 
+# Avoid embedding build path
+CFLAGS += -ffile-prefix-map=$(CURDIR)=.
+
 # shared library versions, option 1
 version=1.0.0
 major=1
-- 
2.36.1

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Message #10 received at 1011480-done@bugs.debian.org (full text, mbox, reply):

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

To: 1011480-done@bugs.debian.org

Subject: Re: libxsettings-client: reproducible-builds: embedded build paths

Date: Sat, 12 Nov 2022 23:14:28 -0800

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

Version: 0.17-11

On 2022-05-23, Vagrant Cascadian wrote:
> The build path is embedded in /usr/lib/libXsettings-client.so.0.0.0:
...
> The attached patch fixes this by setting -ffile-prefix-map in CFLAGS in
> debian/rules, which avoids embedding the absolute build path.
>
> Alternately, switching to use a newer debhelper compat level and the dh
> build system would likely also fix this, as it includes -ffile-prefix-map
> by default.

This was fixed by the switch to dh/debhelper-compat v13:

libxsettings-client (0.17-11) unstable; urgency=medium

  * QA upload.
  * debian/: Apply wrap-and-sort -abst.
  * debian/control:
    + Bump Standards-Version to 4.6.1.
    + Update Vcs-* fields.
    + Bump debhelper compat to v13.
  * debian/rules: Convert to dh sequencer.
  * debian/copyright: Rewrite in machine-readable format.
  * debian/patches: Add patch for .pc file to use correct libdir.

 -- Boyuan Yang <byang@debian.org>  Mon, 10 Oct 2022 16:53:27 -0400


live well,
  vagrant

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