Debian Bug report logs - #1020807
poster: reproducible-builds: build path embedded in /usr/bin/poster

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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: poster: reproducible-builds: build path embedded in /usr/bin/poster

Date: Mon, 26 Sep 2022 17:11:12 -0700

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

Source: poster
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/bin/pbyacc:

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

  /build/1st/poster-20050907/poster.c:181
  vs.
  /build/2/poster-20050907/2nd/poster.c:181

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

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

Thanks for maintaining poster!

live well,
  vagrant

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

From 28f86f2e8f5624a9086176fc4c270437c141c351 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Tue, 27 Sep 2022 00:06:02 +0000
Subject: [PATCH] Makefile: Add -ffile-prefix-map to CFLAGS to avoid embedding
 build path.

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

diff --git a/Makefile b/Makefile
index 633f45d..f9bcd05 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # on Debian:
 DEFINES  = -DHAVE_LIBPAPER
-CFLAGS = -O2 -g -Wall
+CFLAGS = -O2 -g -Wall -ffile-prefix-map=$(CURDIR)=.
 LIBS = -lm -lpaper
 # elsewhere
 #DEFINES = # nothing
-- 
2.37.2

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