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Description: Set Fdutils.texi date to build Fdutils.dvi reproducibly
Inspired by:
https://wiki.debian.org/ReproducibleBuilds/TimestampsInDviGeneratedByLaTeX
Author: Matteo Cypriani <mcy@lm7.fr>
Last-Update: 2021-02-02
--- a/doc/Makefile.in
+++ b/doc/Makefile.in
@@ -83,6 +83,9 @@
Fdutils.texi: $(TEXISRC) texi-linearize$(EXEEXT_FOR_BUILD)
./texi-linearize$(EXEEXT_FOR_BUILD) $(srcdir) fdutils.texi > $@
+ minutes_since_midnight=$$(expr `date -u "+%H" -r $<` '*' 60 + `date -u "+%M" -r $<`); \
+ creation_time=$$(date -u "+\\\year=%Y\\\month=%m\\\day=%d\\\time=$$minutes_since_midnight" -r $<); \
+ sed -i "1s/^/$$creation_time/" Fdutils.texi
# Don't cd, to avoid breaking install-sh references.
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