Source: binutils Severity: normal Tags: patch User: reproducible-bui...@lists.alioth.debian.org Usertags: buildpath X-Debbugs-Cc: reproducible-b...@lists.alioth.debian.org
The build path is embedded in debugging symbols: https://tests.reproducible-builds.org/debian/rb-pkg/unstable/armhf/diffoscope-results/binutils.html /usr/lib/debug/.dwz/arm-linux-gnueabihf/binutils-arm-linux-gnueabihf.debug /build/1st/binutils-2.40/builddir-single/binutils vs. /build/2/binutils-2.40/2nd/builddir-single/binutils The attached patch to debian/rules fixes this by passing the -ffile-prefix-map in CFLAGS and CXXFLAGS, which strips the build path from occurences of __FILE__ and in debug symbols. Unfortunately, this patch alone does not solve all reproducibility issues, but applying this patch should significantly reduce the differences, making it easier to debug remaining issues. Thanks for maintaining binutils! live well, vagrant
From 50a1fd550c04ed9656df87e95477187f693e6954 Mon Sep 17 00:00:00 2001 From: Vagrant Cascadian <vagr...@reproducible-builds.org> Date: Tue, 4 Apr 2023 16:16:37 -0700 Subject: [PATCH 2/2] debian/rules: Add -ffile-prefix-map to CFLAGS and CXXFLAGS. This avoids embedding the full paths to files used in the __FILE__ macro and and in debug symbols. https://tests.reproducible-builds.org/debian/issues/unstable/gcc_captures_build_path_issue.html --- debian/rules | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/debian/rules b/debian/rules index a697df43..a681e3da 100755 --- a/debian/rules +++ b/debian/rules @@ -289,8 +289,8 @@ ifneq (,$(filter $(DEB_HOST_ARCH), $(gold_targets))) gold_provides = -Vgold:Provides=binutils-gold endif -CFLAGS = -g -O2 -CXXFLAGS = -g -O2 +CFLAGS = -g -O2 -ffile-prefix-map=$(CURDIR)=. +CXXFLAGS = -g -O2 -ffile-prefix-map=$(CURDIR)=. LDFLAGS = CROSS := $(DEB_HOST_GNU_TYPE)- CC = $(CROSS)gcc -- 2.39.2
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