Log Message:
From bulk build report, it says
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 # error "Compiler threading support is not turned on. Please set the
     correct command line options for threading: -pthread (Linux),
     -pthreads (Solaris) or -mthreads (Mingw32)"
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and not sure it is right suggestion, but adding the line
+CXXFLAGS.SunOS+=       -pthreads