Re: make BuiltinTrancheNames less ugly

On 2024-Jan-23, Heikki Linnakangas wrote:

> On 23/01/2024 12:25, Alvaro Herrera wrote:

> > 2. More invasively, rework generate-lwlocknames.pl so that both lwlocks
> > and these builtin tranche names appear in a single array. (We could do
> > so by #include'ing lwlocknames.c at the top of the array).

> Idea 2 seems pretty straightforward, +1 for that.

This is what I came up with. For the compilation framework (both
Makefile and meson) I mostly just copied what we do in src/backend/node,
which seems to have passed CI just fine, but maybe there are better ways
to achieve it.

... oh, actually FreeBSD failed with this strange problem while linking:
[11:39:43.550] ld: error: undefined symbol: __dtraceenabled_postgresql___lwlock__wait__start
[11:39:43.551] >>> referenced by lwlock.c:1277 (../src/backend/storage/lmgr/lwlock.c:1277)
[11:39:43.551] >>> lwlock.a.p/lwlock.c.o:(LWLockAcquire) in archive src/backend/storage/lmgr/lwlock.a
[11:39:43.551] >>> referenced by lwlock.c:1442 (../src/backend/storage/lmgr/lwlock.c:1442)
[11:39:43.551] >>> lwlock.a.p/lwlock.c.o:(LWLockAcquireOrWait) in archive src/backend/storage/lmgr/lwlock.a
[11:39:43.551] >>> referenced by lwlock.c:1660 (../src/backend/storage/lmgr/lwlock.c:1660)
[11:39:43.551] >>> lwlock.a.p/lwlock.c.o:(LWLockWaitForVar) in archive src/backend/storage/lmgr/lwlock.a
[11:39:43.551]
[ further similar lines ]
https://cirrus-ci.com/task/5055489315176448?logs=build#L1091

I have no idea what this means or how is it related to what I'm doing.

IMO it would be less ugly to have the origin file lwlocknames.txt be not
a text file but a .h with a macro that can be defined by interested
parties so that they can extract what they want from the file, like
PG_CMDTAG or PG_KEYWORD. Using Perl for this seems dirty ...

--
Álvaro Herrera 48°01'N 7°57'E — https://www.EnterpriseDB.com/
"In Europe they call me Niklaus Wirth; in the US they call me Nickel's worth.
That's because in Europe they call me by name, and in the US by value!"