cmake.bbclass: use weakest ??= assignment for default OECMAKE_SOURCEPATH
Make it slightly easier to support situations where the default path needs to be over-ridden more than once. (From OE-Core rev: 07390e3d45cdf244079a6b91175512ebac789da0) Signed-off-by: Andre McCurdy <armccurdy@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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# Path to the CMake file to process.
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OECMAKE_SOURCEPATH ?= "${S}"
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OECMAKE_SOURCEPATH ??= "${S}"
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DEPENDS_prepend = "cmake-native "
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B = "${WORKDIR}/build"
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