Debian Bug report logs - #1020889
libapache2-mod-auth-pgsql: reproducible-builds: Embedded build paths in mod_auth_pgsql.so

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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: libapache2-mod-auth-pgsql: reproducible-builds: Embedded build paths in mod_auth_pgsql.so

Date: Tue, 27 Sep 2022 16:14:22 -0700

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

Source: libapache2-mod-auth-pgsql
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/apache2/modules/mod_auth_pgsql.so:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/diffoscope-results/libapache2-mod-auth-pgsql.html

  /build/1st/libapache2-mod-auth-pgsql-2.0.3/mod_auth_pgsql.c:298
  vs.
  /build/2/libapache2-mod-auth-pgsql-2.0.3/2nd/mod_auth_pgsql.c:298

The attached patch to the upstream Makefile debian/rules fixes this by
passing -ffile-prefix-map to apxs2.

According to my local tests, with this patch applied
libapache2-mod-auth-pgsql should build reproducibly on
tests.reproducible-builds.org!

Thanks for maintaining libapache2-mod-auth-pgsql!

live well,
  vagrant

[0001-Makefile-call-apxs2-using-ffile-prefix-map-to-avoid-.patch (text/x-diff, inline)]

From 9ed137525ae08db8e93ee7097d87c2467fda27aa Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Tue, 27 Sep 2022 23:09:04 +0000
Subject: [PATCH] Makefile: call apxs2 using -ffile-prefix-map 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 eccaea6..fb17c60 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ PGSQL_LIB=/usr/lib
 PGSQL_INCLUDE=$(shell pg_config --includedir)
 
 shared:
-	${APACHE2_HOME}/bin/apxs2 -a -c -I ${PGSQL_INCLUDE} -L ${PGSQL_LIB} -lpq mod_auth_pgsql.c
+	${APACHE2_HOME}/bin/apxs2 -a -c -Wc,-ffile-prefix-map=$(CURDIR)=. -I ${PGSQL_INCLUDE} -L ${PGSQL_LIB} -lpq mod_auth_pgsql.c
 
 indent:
 	indent -kr -ts4 mod_auth_pgsql.c
-- 
2.37.2

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