Package: jansson
Version: 2.7-3
Severity: wishlist
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: timestamps

Hi!

While working on the "reproducible builds" effort [1], we have noticed
that jansson could not be built reproducibly.

The attached patch removes extra timestamps from the build system.
Once applied, jansson can be built reproducibly in our current
experimental framework.

 [1]: https://wiki.debian.org/ReproducibleBuilds
diff -urNp jansson-2.7.old/debian/rules jansson-2.7/debian/rules
--- jansson-2.7.old/debian/rules	2015-06-23 08:11:19.000000000 -0300
+++ jansson-2.7/debian/rules	2015-06-24 00:19:44.637089407 -0300
@@ -1,11 +1,15 @@
 #!/usr/bin/make -f
 
+LAST_CHANGE = $(shell dpkg-parsechangelog -S Date)
+BUILD_DATE  = $(shell LC_ALL=C date -u "+%B %d, %Y" -d "$(LAST_CHANGE)")
+SPHINXOPTS := -D today=\"$(BUILD_DATE)\"
+
 %:
 	dh $@ --with=autoreconf,sphinxdoc
 
 override_dh_auto_build:
 	dh_auto_build
-	$(MAKE) html
+	$(MAKE) html SPHINXOPTS="$(SPHINXOPTS)"
 
 override_dh_strip:
 	dh_strip --dbg-package=libjansson-dbg
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