Skip tests if test subdir is missing

Problem reported by Jeffrey Walton in:
https://lists.gnu.org/r/emacs-devel/2019-05/msg00041.html
* Makefile.in (CHECK_TARGETS): New macro; use it
to simplify 'check' and similar rules.
($(CHECK_TARGETS)): If tests are missing, do not fail
after issuing a diagnostic.  Just skip the tests.

1 files changed, 8 insertions, 10 deletions

diff --git a/Makefile.in b/Makefile.in
index 06da415a4ab..21362a91963 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -950,17 +950,15 @@ extraclean: $(extraclean_dirs:=_extraclean)
 TAGS tags: lib lib-src # src
         $(MAKE) -C src tags
 
-.PHONY: have-tests
-have-tests:
-        @if test ! -d test; then \
-          echo "You do not seem to have the test/ directory."; \
-          echo "Maybe you are using a release tarfile, rather than a repository checkout."; \
-         exit 1; \
-        fi
-
-.PHONY: check check-maybe check-expensive check-all
-check check-maybe check-expensive check-all: have-tests all
+CHECK_TARGETS = check check-maybe check-expensive check-all
+.PHONY: $(CHECK_TARGETS)
+$(CHECK_TARGETS): all
+ifeq ($(wildcard test),test)
         $(MAKE) -C test $@
+else
+        @echo "You do not seem to have the test/ directory."
+        @echo "Maybe you used a release tarfile that lacks tests."
+endif
 
 dist:
         cd ${srcdir}; ./make-dist