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-rw-r--r--doc/Makefile.am2
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 541c2fc20..6a0e39cf4 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -177,6 +177,8 @@ defsincdate: $(gnupg_TEXINFOS)
if test -e $(top_srcdir)/.git; then \
(cd $(srcdir) && git log -1 --format='%ct' \
-- $(gnupg_TEXINFOS) 2>/dev/null) >>defsincdate; \
+ elif test x"$SOURCE_DATE_EPOCH" != x; then \
+ echo "$SOURCE_DATE_EPOCH" >>defsincdate ; \
fi
defs.inc : defsincdate Makefile mkdefsinc