[bug #57218] [PATCH] Reproducible builds support is broken and embeds timezone

[G. Branden Robinson]

Follow-up Comment #13, bug #57218 (project groff):

Today's commits significantly improve the situation.


2020-12-25  G. Branden Robinson <g.branden.robinson@gmail.com>

        * doc/doc.am (.texi.dvi): Call texi2dvi with FORCE_SOURCE_DATE=1
        in the environment, avoiding an embedded timestamp in the
        generated groff.dvi file, which frustrated reproducible builds.
        Thanks to Werner Lemberg for the suggestion.

        * src/roff/groff/tests/string_case_xform_unicode_escape.sh: Fix
        test to no longer use Bash process substitution, resulting in
        nondeterministic file descriptor numbers appearing in test logs,
        frustrating reproducible builds.

        * contrib/pdfmark/pdfmark.am (PDFROFF): Call pdfroff without
        `--keep-temporary-files` option.  Temporary directories are
        created with mktemp(1) and files with an embedded process
        identifier, which frustrates reproducible builds.

        See <https://savannah.gnu.org/bugs/?57218>.


Attaching new, much shorter (2KiB), diff of two sequential builds using
SOURCE_DATE_EPOCH.

(file #50566)
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Additional Item Attachment:

File name: groff-repro-build_2020-12-25.diff Size:2 KB
   
<https://file.savannah.gnu.org/file/groff-repro-build_2020-12-25.diff?file_id=50566>



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