Make defines in pg_config_manual.h conditional?

Andres Freund <andres@anarazel.de> writes:

ATM the defines in pg_config_manual.h are largely unconditional - which
means the file has to be edited instead of being able to override things
via CFLAGS/COPT. Is there any good reason for doing so?

YES. If you do things like that, the installed version of
pg_config_manual.h will not reflect the way the backend was built,
which is likely to break pgxs-type builds of addon modules later.

Just edit the file.

regards, tom lane

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