Right, the first step would be for a WSL user to figure out what's wrong with builds on the WSL and show us how to fix it; I heard through the grapevine that if you try it, initdb doesn't work (it must be something pretty subtle in the configure phase or something like that, since the Ubuntu .deb apparently works, except for the issue reported in this thread).
That's correct - initdb doesn't work when you've built on WSL as *somehow* HAVE_FDATASYNC is set to 1 by configure - but it ends up not being included by #ifdef blocks. This causes the following PANIC
PANIC: unrecognized wal_sync_method: 1
Which happens because wal_sync is set to 1, but in src/backend/access/transam/xlog.c that block in the switch is inside the #ifdef so never gets checked,
--
James
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