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-rw-r--r--python/pymake/tests/parallel-toserial.mk31
1 files changed, 31 insertions, 0 deletions
diff --git a/python/pymake/tests/parallel-toserial.mk b/python/pymake/tests/parallel-toserial.mk
new file mode 100644
index 000000000..9a355eb33
--- /dev/null
+++ b/python/pymake/tests/parallel-toserial.mk
@@ -0,0 +1,31 @@
+#T commandline: ['-j4']
+
+# Test that -j1 in a submake has the proper effect.
+
+define SLOWCMD
+printf "$@:0:" >>$(RFILE)
+sleep 0.5
+printf "$@:1:" >>$(RFILE)
+endef
+
+all: p1 p2
+subtarget: s1 s2
+
+p1 p2: RFILE = presult
+s1 s2: RFILE = sresult
+
+p1 s1:
+ $(SLOWCMD)
+
+p2 s2:
+ sleep 0.1
+ $(SLOWCMD)
+
+all:
+ $(MAKE) -j1 -f $(TESTPATH)/parallel-toserial.mk subtarget
+ printf "presult: %s\n" "$$(cat presult)"
+ test "$$(cat presult)" = "p1:0:p2:0:p1:1:p2:1:"
+ printf "sresult: %s\n" "$$(cat sresult)"
+ test "$$(cat sresult)" = "s1:0:s1:1:s2:0:s2:1:"
+ @echo TEST-PASS
+