Don't use more test threads than make wants

Makefile

@@ -15,6 +15,7 @@ DESTDIR=
 USEDEBIANLIBS=no
 PROD=$(USEDEBIANLIBS)
 USEEXTERNALLIBS=no
+PARA=$(shell perl -000 -e 'print ( "$(MAKEFLAGS)" =~ /-j(\d+)/ ? "j$1:c" : "")')
 
 # Perl options
 #PERLOPTIONS="INSTALLDIRS=vendor"
@@ -374,13 +375,13 @@ manager:	manager_conf handler
 test:		all common_test handler_test portal_test manager_test
 
 common_test:	common
-	@HARNESS_OPTIONS=j8:c $(MAKE) -C ${SRCCOMMONDIR} test
+	@HARNESS_OPTIONS=$(PARA) $(MAKE) -C ${SRCCOMMONDIR} test
 
 handler_test:	handler
 	@$(MAKE) -C ${SRCHANDLERDIR} test
 
 portal_test:	portal
-	@HARNESS_OPTIONS=j8:c $(MAKE) -C ${SRCPORTALDIR} test
+	@HARNESS_OPTIONS=$(PARA) $(MAKE) -C ${SRCPORTALDIR} test
 
 manager_test:	manager
 	@$(MAKE) -C ${SRCMANAGERDIR} test

lemonldap-ng-portal/.proverc

@@ -2,4 +2,3 @@
 -I ../lemonldap-ng-common/blib/lib
 -I ../lemonldap-ng-handler/blib/lib
 --blib
---jobs 8