Debian Bug report logs - #1020659
lookup: reproducible-builds: Embedded build path in /usr/bin/lookup

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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: lookup: reproducible-builds: Embedded build path in /usr/bin/lookup

Date: Sat, 24 Sep 2022 15:19:08 -0700

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

Source: lookup
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/lookup:

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

  /build/1st/lookup-1.08b/lookup.c:34
  vs.
  /build/2/lookup-1.08b/2nd/lookup.c:34

The attached patch fixes this by adding the -ffile-prefix-map argument
to CFLAGS in the upstream Makefile, and should be added to
debian/patches.

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

Thanks for maintaining lookup!

live well,
  vagrant

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

From 885cd0118a719cb1d73904557063d56318ced514 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Sat, 24 Sep 2022 22:14:17 +0000
Subject: [PATCH] Makefile: Pass -ffile-prefix-map in CFLAGS to avoid embedding
 build paths.

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

diff --git a/Makefile b/Makefile
index 7bfce46..57aac3f 100644
--- a/Makefile
+++ b/Makefile
@@ -96,6 +96,7 @@ LOCAL_LIB=jefflib.a
 LIBS= $(LOCAL_LIB) $(OTHERLIBS)
 
 CFLAGS= $(OPTIONS) $(EXTRA) $(CFLAGS_EXTRA)
+CFLAGS += -ffile-prefix-map=$(CURDIR)=.
 
 objs=lookup.o commands.o apply_regex.o eval.o
 
-- 
2.30.2

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