Looks like the JIT flags definitions are not properly parenthesized.
It might not matter too much for their current usage, but it might
save a bit of confusion later.
git grep "^#define .*<<.*[^)]$" indicates these are the only offenders.
Patch attached.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services