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-rw-r--r--cpp/src/tests/Makefile.am4
1 files changed, 4 insertions, 0 deletions
diff --git a/cpp/src/tests/Makefile.am b/cpp/src/tests/Makefile.am
index a9c2559a1f..d4a32f7a3d 100644
--- a/cpp/src/tests/Makefile.am
+++ b/cpp/src/tests/Makefile.am
@@ -121,3 +121,7 @@ check-unit:
.valgrindrc: .valgrindrc-default
cp $(srcdir)/.valgrindrc-default .valgrindrc
+# Tell GNU make not to build targets in this directory in parallel.
+# This is necessary because with two or more identical and simultaneous
+# ltmain invocations, one may corrupt the temporaries of the other.
+.NOTPARALLEL: