I am compiling postgres on a intel mac machine
../../../../src/include/storage/s_lock.h:543:2: error: #error PostgreSQL
does not have native spinlock support on this platform. To continue the
compilation, rerun configure using --disable-spinlocks. However,
performance will be poor. Please report this to pgsql-bugs@postgresql.org.
In file included from ../../../../src/include/storage/spin.h:50,
from xlog.c:35:
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