[PATCH inputproto] specs: Set TZ=UTC before calling asciidoc

[Andreas Boll]

Set TZ=UTC before calling asciidoc to make the embedded dates invariant
to timezones in order to make the package build reproducibly.

Fixes bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=795981

Suggested-by: Eduard Sanou <dhole at openmailbox.org>
Signed-off-by: Andreas Boll <andreas.boll.dev at gmail.com>
---
 specs/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/specs/Makefile.am b/specs/Makefile.am
index a83cf40..d04f4d0 100644
--- a/specs/Makefile.am
+++ b/specs/Makefile.am
@@ -6,7 +6,7 @@ doc_DATA = XI2proto.html XIproto.html
 dist_doc_DATA = XI2proto.txt XIproto.txt
 
 %.html: %.txt
-	$(AM_V_GEN)$(ASCIIDOC) -o $@ $<
+	TZ=UTC $(AM_V_GEN)$(ASCIIDOC) -o $@ $<
 
 CLEANFILES = $(doc_DATA)
 
-- 
2.1.4