Hi, I've just noticed this in your r266209 change from November:

On 16/11/18 10:42 +0000, Renlin Li wrote:
+    return [check_v3_target_prop_cached et_parallel_mode {
+       global cxxflags
+       global v3-libgomp
        # If 'make check-parallel' is running the test succeeds.
        if { ${v3-libgomp} == 1 && [regexp "libgomp" $cxxflags] } {
-           set et_parallel_mode 1
+           return1 1

Is this a typo? It should be "return 1" not "return1 1" right?

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