getenv undefined reference

RE: getenv undefined reference

Richix — Wed, 15 Jul 2020 10:19:46 GMT

Hi again,

With your help I figured out the problem. I just needed to remove some of the library from lua that need to use os dependent modules. Lua work fine from my very first tests. Ja I am beginner in lua so...

To your question: I am not trying to develop any runtime environment on the nRF52840, therefore such getenv function does not make sens....

Thanks again

RE: getenv undefined reference

haakonsh — Tue, 14 Jul 2020 09:11:45 GMT

Are you building a Lua runtime environment for the nRF52840?

RE: getenv undefined reference

Richix — Tue, 14 Jul 2020 08:52:50 GMT

OK haakonsh, you helped already a lot. I need to go deeper in the lua script and I think I will come back here with some solution in a few days. I will also answer your question later.

RE: getenv undefined reference

haakonsh — Tue, 14 Jul 2020 08:49:02 GMT

We have no support for Lua.

What is it that the Lua library is trying to do with the getenv function though?

RE: getenv undefined reference

Richix — Tue, 14 Jul 2020 08:20:57 GMT

OK, Indeed I am not si familiar with such environment function. I want to use lua script on the nrf52840 development kit. I imported the library of this script on the nrf52840. One module of the lua script use the getenv, therfore I get the error shwon in my first message. Do you have some experience at nordic for the embedding of lua script (and not eLua) in nrf52840 platform?

RE: getenv undefined reference

haakonsh — Tue, 14 Jul 2020 08:00:11 GMT

getenv does not make any sense on any platform without an os and a file system. Why are you interrested in geting the path to an environmental variable?

RE: getenv undefined reference

Richix — Mon, 13 Jul 2020 15:20:18 GMT

OK thank you for your reply.

Would it be possible to use equivalent funtion such as getenv (or library) on embedded system like the nrf kit?

RE: getenv undefined reference

haakonsh — Mon, 13 Jul 2020 15:08:11 GMT

I'm not familiar with getnv, but from its description in https://www.tutorialspoint.com/c_standard_library/c_function_getenv.htm it sounds like a system call to an OS with a file system.

I doubt there's an implementation in the c libraries for arm embedded devices(gnuarmemb - https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm) for cortex-m family devices.