Ok, I made a script to grep all the `#define` and `#undef` symbols in `config.h` and Geany appears to be fairly careful using `ifdef` `ifndef` or `defined()`,
Good :)
Scintilla has at least one place where it compares a symbol to 0, but I think its its own internal one so fine.
Fine as well.
But ctags!!!! `if HAVE_FOO && HAVE_BAR && HAVE_BLETCH` all over the place. This relies on the identifiers having been defined `1` or it would become `if && &&` after the defined but empty identifiers were substituted. Sigh!!!
Feel like making a PR upstream? :)
So I guess we have no choice but to continue defining `1` until C23 when `true` will be accepted :-)
Well meson would just emit an empty `#define FOO` if you use `cfg_data.set('FOO', true)` -- e.g. when using a boolean, it emits either an empty `#define` or a `#undef`. So kinda irrelevant :)