[beast: 2/10] TESTS: filecheck: throw an error if the file checklist is empty

[Tim Janik <timj src gnome org>]

commit 5c15c09fc987ca4429c02cb047bcf54f2e45ebc7
Author: Tim Janik <timj gnu org>
Date:   Sun Jun 18 00:05:26 2017 +0200

    TESTS: filecheck: throw an error if the file checklist is empty
    
    Signed-off-by: Tim Janik <timj gnu org>

 tests/filecheck/Makefile.am |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/tests/filecheck/Makefile.am b/tests/filecheck/Makefile.am
index 9bda389..1100b8e 100644
--- a/tests/filecheck/Makefile.am
+++ b/tests/filecheck/Makefile.am
@@ -37,7 +37,8 @@ checklist-%-test: checklists
              && echo "  OK       Loading: $$tfile" ;           \
            fi ; done ; rm -f $(@F).log $(@F:-test=)
 checklists: distfiles.list # generate checklist-a .. checklist-e
-       $(Q) grep '\.bse$$' distfiles.list > checklist
+       $(Q) grep '\.bse$$' distfiles.list > checklist || \
+       { echo '$@: error: distfiles.list is empty' >&2; exit 1; }
        $(Q) split -n l/5 -a 1 checklist checklist-
        $(Q) rm -f checklist
 CLEANFILES += checklists checklist-? checklist-?-test checklist-?-test.log