tests: new convenience target 'check-parallel'

To force the test scripts to invoke make in parallel mode.  This should
enhance coverage of use cases (make concurrency) that are becoming more
and more important with today multicore fast machines.

* Makefile.am (check-parallel): New .PHONY target.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --git a/Makefile.am b/Makefile.am
index 602d8ee..15b87c9 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -524,6 +524,12 @@ check-no-trailing-backslash-in-recipes:
          CONFIG_SHELL='$(abs_top_builddir)/t/ax/shell-no-trail-bslash'
 .PHONY: check-no-trailing-backslash-in-recipes
 
+# Automake-generated Makefiles should work when run with parallel make.
+check-parallel:
+       $(AM_V_GEN)$(MAKE) $(AM_MAKEFLAGS) check \
+         AM_TESTSUITE_MAKE="$${AM_TESTSUITE_MAKE-$${MAKE-make}} -j4"
+.PHONY: check-parallel
+
 ## Checking the list of tests.
 test_subdirs = t t/pm contrib/t
 include $(srcdir)/t/CheckListOfTests.am