maint: Generate AUTHORS and ChangeLog reproducibly.

* Makefile.am (gen-ChangeLog): Set LC_ALL=en_US.UTF-8 TZ=UTC0.
(gen-AUTHORS): Likewise.

Change-Id: I109ceffdf07b8dde6385b6b509366c47564c9f31

1 files changed, 4 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index a5e49bc406e..7af88b29886 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -974,6 +974,8 @@ gen-tarball-version:
 
 gen-ChangeLog:
         $(AM_V_GEN)if test -e .git; then                \
+          export LC_ALL=en_US.UTF-8;                    \
+          export TZ=UTC0;                               \
           $(top_srcdir)/build-aux/gitlog-to-changelog   \
             > $(distdir)/ChangeLog.tmp;                 \
           rm -f $(distdir)/ChangeLog;                   \
@@ -983,6 +985,8 @@ gen-ChangeLog:
 gen-AUTHORS:
         $(AM_V_GEN)if test -e .git; then                        \
           rm -f "$(distdir)/AUTHORS";                           \
+          export LC_ALL=en_US.UTF-8;                            \
+          export TZ=UTC0;                                       \
           $(top_builddir)/pre-inst-env "$(GUILE)"               \
             "$(top_srcdir)/build-aux/generate-authors.scm"      \
             "$(top_srcdir)" "$(distdir)/AUTHORS";               \