make(1): run tests with different shells as well, reduce output

usr.bin/make/test-variants.sh

@@ -1,5 +1,5 @@
 #! /bin/sh
-# $NetBSD: test-variants.sh,v 1.5 2020/10/23 17:59:25 rillig Exp $
+# $NetBSD: test-variants.sh,v 1.6 2020/11/20 00:24:21 rillig Exp $
 #
 # Build several variants of make and run the tests on them.
 #
@@ -24,7 +24,8 @@ testcase() {
 	&& env -i PATH="$PATH" USETOOLS="no" "$@" \
 		sh -ce "make -ks all" \
 	&& size *.o make \
-	&& env -i PATH="$PATH" USETOOLS="no" MALLOC_OPTIONS="JA" "$@" \
+	&& env -i PATH="$PATH" USETOOLS="no" MALLOC_OPTIONS="JA" \
+		_MKMSG_TEST=":" "$@" \
 		sh -ce "make -s test" \
 	|| fail
 }
@@ -178,4 +179,10 @@ testcase USE_GCC10=yes GCC10BASE=$HOME/pkg/gcc10 USER_CFLAGS="\
 -Wno-error=conversion -Wno-error=sign-conversion -Wno-error=unused-macros \
 -Wno-error=unused-parameter -Wno-error=duplicated-branches"
 
+for shell in /usr/pkg/bin/bash /usr/pkg/bin/dash; do
+	if [ -x "$shell" ]; then
+		testcase USER_CPPFLAGS=-DDEFSHELL_CUSTOM="\\\"$shell\\\""
+	fi
+done
+
 test "$failed" = "no"