How can we determine the libarary version at compile time?

[wb2osz]

I'm trying to update an application, written in C, so it will work with both gpiod v1 and v2.
This would require conditional compilation based on the library version.
/usr/include/gpiod.h, on Raspberrry Pi OS trixie, does not seem to contain a version number.
Do you have any suggestions on how to determine the library version number at compile time?
Thanks.

[brgl]

No, I believe this is always a bad idea so didn't want to enable it. You can probably get that information from pkgconfig when configuring your project.