Debian Bug report logs - #1020881
kafs-client: reproducible-builds: Embedded build paths in binaries

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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: kafs-client: reproducible-builds: Embedded build paths in binaries

Date: Tue, 27 Sep 2022 14:41:56 -0700

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

Source: kafs-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 various binaries or triggers differences
in buildid:

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

  /usr/libexec/kafs-dns

  /build/1st/kafs-client-0.5/src/dns_main.c:221
  vs.
  /build/2/kafs-client-0.5/2nd/src/dns_main.c:221

The attached patch to the upstream Makefile fixes this by adding
-ffile-prefix-map to CFLAGS.

According to my local tests, with this patch applied kafs-client should
build reproducibly on tests.reproducible-builds.org!

Thanks for maintaining kafs-client!

live well,
  vagrant

[0001-Makefile-Add-ffile-prefix-map-to-CFLAGS-to-avoid-emb.patch (text/x-diff, inline)]

From eecef6a737037f42c241d4ffe3a814cdfe94ae08 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Tue, 27 Sep 2022 21:37:47 +0000
Subject: [PATCH] Makefile: Add -ffile-prefix-map to CFLAGS to avoid embedding
 build paths.

https://reproducible-builds.org/docs/build-path/
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 00fe618..2c28567 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CFLAGS		= -g -O2 -Wall -Wsign-compare
+CFLAGS		= -g -O2 -Wall -Wsign-compare -ffile-prefix-map=$(CURDIR)=.
 MKDIR		= mkdir
 INSTALL		= install
 DESTDIR		=
-- 
2.37.2

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