add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# From http://www.cmake.org/files/v3.8/cmake-3.8.2-SHA-256.txt
sha256 da3072794eb4c09f2d782fcee043847b99bb4cf8d4573978d9b2024214d6e92d  cmake-3.8.2.tar.gz