+# Set this variable to "yes" before calling this script to disregard all cmake
+# warnings in a particular environment (CI or a local working copy). Set it
+# to "yes" in this script or in build.sh when a matrix subset is known to be
+# not cmake warning-free because of the version or whatever other factor
+# that the scripts can detect both in and out of CI.
+: "${TCPDUMP_CMAKE_TAINTED:=no}"
+# Set this variable to "yes" before calling this script to disregard all
+# warnings in a particular environment (CI or a local working copy). Set it
+# to "yes" in this script or in build.sh when a matrix subset is known to be
+# not warning-free because of the OS, the compiler or whatever other factor
+# that the scripts can detect both in and out of CI.
+: "${TCPDUMP_TAINTED:=no}"
+# Some OSes have native make without parallel jobs support and sometimes have
+# GNU Make available as "gmake".
+: "${MAKE_BIN:=make}"