Fudge dates and PDF IDs in the interest of build reproducibility.

debian/patches/28-fudge-pdf-doc-ids.patch

@@ -0,0 +1,27 @@
+From: Carlos Maddela <e7appew@gmail.com>
+Date: Thu, 5 Jan 2017 19:14:35 +1100
+Subject: Generate the same PDF document IDs for build reproducibility.
+
+Description: Generate the same PDF IDs for build reproducibility.
+Author: Carlos Maddela <e7appew@gmail.com>
+Origin: vendor
+Forwarded: not-needed
+Last-Update: 2016-12-21
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+---
+ documentation/user-manual/manual.tex | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/documentation/user-manual/manual.tex b/documentation/user-manual/manual.tex
+index 60fb51e..aaab4fa 100644
+--- a/documentation/user-manual/manual.tex
++++ b/documentation/user-manual/manual.tex
+@@ -65,6 +65,7 @@
+ \fancyfoot{}
+ \fancyfoot[LE,RO]{page \thepage\ of \pageref{LastPage}}
+ 
++\pdftrailerid{dvdisaster}
+ \begin{document}
+ 
+ \definecolor{lightorange}{RGB}{255,224,150}

debian/patches/series

@@ -19,3 +19,4 @@
 25-fix-man-pages.patch
 26-fix-display-of-manual.pdf.patch
 27-allow-opening-in-browser-again.patch
+28-fudge-pdf-doc-ids.patch

debian/rules

@@ -6,6 +6,10 @@ include /usr/share/dpkg/buildflags.mk
 export DEB_CFLAGS_MAINT_APPEND = $(CPPFLAGS) -Wall -Wno-deprecated-declarations -pedantic
 export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed
 
+export SOURCE_DATE_EPOCH := \
+	$(shell date --date="$$(dpkg-parsechangelog -S Date)" +%s)
+export FORCE_SOURCE_DATE = 1
+
 MUTABLE_FILES := build.h $(wildcard locale/*.po) \
 	documentation/config/version.tex