Bug#1009934: openssl: reproducible-builds: Embeded compiler flags contain build paths

[Vagrant Cascadian]

Source: openssl
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: buildpath
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

The compiler flags usually contain the build path on Debian package
builds, and openssl embeds the compiler flags used in various binaries:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/armhf/diffoscope-results/openssl.html

  /usr/lib/libcrypto.so.1.1

  compiler:·gcc·-fPIC...-ffile-prefix-map=/build/1st/openssl-1.1.1n=.·-fstack-...
  vs.
  compiler:·gcc·-fPIC...-ffile-prefix-map=/build/2/openssl-1.1.1n/2nd=.·-fstack-...


The attached patch fixes this by adjusting util/mkbuildinf.pl to strip
the buildpath out and replace it with the with the placeholder string
"BUILDPATH".


Unfortunately, there are other outstanding issues affecting the
reproducibility of openssl, but applying this patch should reduce the
differences, making it easier to debug the remaining issues.


Thanks for maintaining openssl!


live well,
  vagrant
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