What Board it is MKR1000 or ESP8266?

I have a sketch that should run on a MKR1000 or and ESP8266 . How can I distinguish wich bord is running?
I looked #define in boards.h and cpunames.h but I couldn't find definitions for that boards
Help with this will be appreciated.
Regards,

esp8266 Arduino has defined ESP8266.
or

Thanks juraj. Do you know if thre is one for MKR1000?

There is a macro specifically for the MKR 1000 board: ARDUINO_SAMD_MKR1000.

There is also one for the samd architecture used by the "Arduino SAMD Boards" platform of the MKR1000: ARDUINO_ARCH_SAMD, which will be defined if you are compiling for any board of that architecture.

There are some additional macros that were defined at a lower level by the toolchain. I don't remember their exact names, but I can likely dig it up if you need it.

Thank you very much for the info

Regards

and boards for WiFiNINA have some extra defines too

Thanks your help was fantastic!!