test-common: Use $(wildcard ) rather than $(shell echo )

This is probably a bit faster, but more relevantly it would DTRT if
for some reason there were no applicable tests.  Which is going to
happen in a moment, when we add some machinery before the applicable
test.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/test-common.sd.mk b/test-common.sd.mk
index bf9c6cf26a25a9ec4276209bfc80dc2b8c574dcc..0d6cebfa3bd1e18ceab7289f1d4738fe0c6b8441 100644 (file)
--- a/test-common.sd.mk
+++ b/test-common.sd.mk
@@ -1,7 +1,7 @@
 
 include common.make
 
-&TESTSCRIPTS ?= $(shell echo &^/t-*[0-9a-z])
+&TESTSCRIPTS ?= $(wildcard &^/t-*[0-9a-z])
 &TESTNAMES := $(patsubst t-%,%,$(notdir $(&TESTSCRIPTS)))
 
 &DEPS += $(src)/test-common.tcl