What is this: Could NOT find Perl (missing: PERL_EXECUTABLE)?

[bonmotwang]

Just curious what does this mean?
My projects compile OK, but always wanted to know why the compiler is looking for Perl.
Thanks.

[ESP_Angus]

Hi bonmotwang,

ESP-IDF build system uses the mbedTLS library's own CMakelists.txt file to build the library, and it prints this warning when it runs.

I'm not certain what Perl is used for in mbedTLS (maybe somewhere in the test code?) but it's not needed at all to build ESP-IDF.

Sorry for the unecessary confusion caused by the warning.

Angus