Bug#1000946: gcc-riscv64-unknown-elf: reproducible builds: embeds path to various binaries

[Vagrant Cascadian]

Source: gcc-riscv64-unknown-elf
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: usrmerge shell
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org, keithp at keithp.com

The paths to various binaries are embedded which differs on a usrmerge
vs. non-usrmerge system.

  https://tests.reproducible-builds.org/debian/rb-pkg/bookworm/amd64/diffoscope-results/gcc-riscv64-unknown-elf.html

  /usr/lib/gcc/riscv64-unknown-elf/8.3.0/install-tools/fixincl

  /bin/sed
  vs.
  /usr/bin/sed

  /usr/lib/gcc/riscv64-unknown-elf/8.3.0/install-tools/mkheaders

  mkinstalldirs="/bin/bash·${itoolsdir}/mkinstalldirs"
  vs.
  mkinstalldirs="/bin/sh·${itoolsdir}/mkinstalldirs"

Patch attached which passes variables to configure to use the
non-usrmerge locations, as usrmerge installations typically have
compatibility symlinks, but not vice-versa. The patch also sets
variables to ensure consistent values for bash, which can be triggered
when /bin/sh points to bash.

This patch alone does not fix all reproducibility issues (e.g. build
paths, which are only tested on unstable and experimental), but should
build reproducibly in bookworm/testing once binutils-riscv64-unknown-elf
is built with deterministic archives enabled.


Thanks for maintaining gcc-riscv64-unknown-elf!


live well,
  vagrant

p.s. more deja-vu?
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