libublksrv: Build fixes for 32-bit systems and external integration

ublk-org / ublksrv

ublk: userspace block device driver

MIT License

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Closed dhavale closed 1 week ago

dhavale commented 1 week ago

There are 2 commits in this request

First one wraps a defining _GNU_SOURCE under #ifndef so we avoid redefinition build errors
Second one fixes eventfd write() call to use uint64_t at all the places. This fixes error on 32-bit platforms where we were using 4byte wide data type.