Bug#1000945: binutils-riscv64-unknown-elf: reproducible builds: Enable deterministic archives

[Vagrant Cascadian]

Package: binutils-riscv64-unknown-elf
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps toolchain
Control: affects -1 gcc-riscv64-unknown-elf
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org, keithp at keithp.com

binutils-riscv64-unknown-elf is not built with deterministic archives enabled,
which causes reproducibility issues in packages using it:

  https://tests.reproducible-builds.org/debian/issues/unstable/timestamps_in_static_libraries_issue.html

The attached patch adds --enable-deterministic-archives to the configure
arguments in debian/rules.

FWIW, the --enable-deterministic-archives feature was enabled Debian's "binutils"
package in 2015.

With this feature enabled in binutils-riscv64-unknown-elf, it makes
gcc-riscv64-unknown-elf much closer to building reproducibly when using
a stable build path.

Thanks for maintaining binutils-riscv64-unknown-elf!

live well,
  vagrant

p.s. this feels a bit like deja-vu, only the architecture has changed.
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