Bug#977001: blitz++: reproducible builds: build time embedded in bzconfig.h

[Vagrant Cascadian]

Source: blitz++
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 file /usr/include/blitz/gnu/bzconfig.h contains an embedded timestamp:

  https://tests.reproducible-builds.org/debian/rb-pkg/buster/amd64/diffoscope-results/blitz++.html

  421 #define·BZ__config_date·"Sun·Dec··6·02:21:14·-12·2020"·	421 #define·BZ__config_date·"Sun·Jan··9·11:08:27·+14·2022"·


The attached patch fixes this by patching to use the SOURCE_DATE_EPOCH
environment variable to set the value for DATE.

  https://reproducible-builds.org/docs/source-date-epoch/

The patch relies on gnu date extensions/syntax (--utc, --date) and may
need further work to make it portable across multiple date
implementations for upstream.


Thanks for maintaining blitz++


live well,
  vagrant

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