[beast: 16/24] BUILD: catch cases where an empty ChangeLog is generated

[Tim Janik <timj src gnome org>]

commit 986419e8187841743564c84b19e98281c0d1fd61
Author: Tim Janik <timj gnu org>
Date:   Mon Sep 14 13:02:16 2015 +0200

    BUILD: catch cases where an empty ChangeLog is generated

 Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 1241dd1..51344ed 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -51,6 +51,7 @@ ChangeLog: $(GITSTAMPS)
        $(Q) sed 's/^/  /; s/^  ^^// ; s/[[:space:]]\+$$// '    -i xgen-$(@F) # Tab-indent commit bodies, 
kill trailing whitespaces
        $(Q) sed '/^\s*$$/{ N; /^\s*\n\s*$$/D }'                -i xgen-$(@F) # Compress multiple newlines
        $(Q) mv xgen-$(@F) $@
+       $(Q) test -s $@ || { mv $@ $  empty ; ls -al --full-time $  empty ; exit 1 ; }
 noinst_DATA          += ChangeLog
 MAINTAINERCLEANFILES += ChangeLog
 EXTRA_DIST           += ChangeLog