Bug#1021893: device-tree-compiler: reproducible builds: Embeds build time in in various binaries

[Vagrant Cascadian]

Source: device-tree-compiler
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

The build time is embedded in various binaries:

  https://tests.reproducible-builds.org/debian/rb-pkg/bookworm/amd64/diffoscope-results/device-tree-compiler.html

  /usr/bin/convert-dtsv0

  /build/1st/device-tree-compiler-1.6.1/srcpos.c:101
  vs.
  /build/2/device-tree-compiler-1.6.1/2nd/srcpos.c:101

The attached patch to debian/rules fixes this by passing the default
CFLAGS via EXTRA_CFLAGS, which includes the -ffile-prefix-map compiler
option.

According to my local tests, with this patch applied, device-tree-compiler should build
reproducibly on tests.reproducible-builds.org!

Thanks for maintaining device-tree-compiler!

live well,
  vagrant
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