I found the makefile it was executing, but i have no idea what the problem might be...
Aren't there any precompiled versions of this sdk? It would work for me, if tey wuldn't be
terribly outdatet...
I'll send the makefile, if it helps. It was located at <ndless directory>\ndless-sdk\toolchain\build .
Unfortunatley i have no idea what those default commands might be...

Spellcheck is your friend.
There may be some people with precompiled versions of the SDK on windows that might be willing to share with you. At this point unless someone who works on it comes forward with a solution, you may want to open an issue here: https://github.com/ndless-nspire/Ndless/issues/new

From what I can tell it's failing when attempting to determine what directory it's running in. @ExtendeD @Legimet or @Vogtinator do you have any idea what is going on here? It's failing on the following code@r=`${PWD_COMMAND}`; export r; \

I only see .gitmodules in there.
EDIT: Wrong folder.  Sorry. There are ".downloaded" and ".gitgnore".

Like this? I left the files created in the prievious run of build_toolchain.sh.

It has nothing to do with genzehn. Did you install gcc-g++ (the C++ compiler) in cygwin? I think that is the issue.

Make sure you have all of the dependencies in the list given on https://hackspire.org/index.php/C_and_assembly_development_introduction

php (5.6+), libboost-devel, libboost_program_options*, binutils, gcc-core, gcc-g++, git, mpfr, mpfr-devel, gmp, libgmp-devel, libmpc3, libmpc-devel, make, zlib-devel, wget

You can install these with the cygwin installer.

Also, you still need to fix the zehn.h symlink, but it is located in ndless-sdk/tools/genzehn. You need to replace it with the file in ndless-sdk/include.

Is this link done in a way that cygwin libraries can't handle?

Unfortunately, Git on Windows doesn't enable support for symlinks by default because of differences between Windows symlinks and POSIX symlinks: https://github.com/git-for-windows/git/wiki/Symbolic-Links

Perhaps it does. Someone with Windows would have to test it and update the instructions if necessary.

I still don't know why it does not work...
Maybe i could use a copy of someone's toolchain folder? Would this work?
Eems, you said some people had precompiled packages. Do you know how i could  reach those persons?

It's Eeems not Eems.
You still haven't answered @Legimet's questions.
Have you followed the steps he outlined here:

It has nothing to do with genzehn. Did you install gcc-g++ (the C++ compiler) in cygwin? I think that is the issue.

Make sure you have all of the dependencies in the list given on https://hackspire.org/index.php/C_and_assembly_development_introduction

Quote

php (5.6+), libboost-devel, libboost_program_options*, binutils, gcc-core, gcc-g++, git, mpfr, mpfr-devel, gmp, libgmp-devel, libmpc3, libmpc-devel, make, zlib-devel, wget

You can install these with the cygwin installer.

Also, you still need to fix the zehn.h symlink, but it is located in ndless-sdk/tools/genzehn. You need to replace it with the file in ndless-sdk/include.

As for the precompiled packages, I'm not sure who actually have them. You could create an issue asking for it here: https://github.com/ndless-nspire/Ndless/issues
It would still probably be best to just sort out the issues that @Legimet mentioned.

1. Tried it on linux. Didn't work.
2. I already had gcc installed.
3. The binaries don't have to be as up-to-date. I only want the compiled stuff to work on my calculartor without crashing it.