document environment variables for haxe and haxelib

[nadako]

i often need a reminder on what environment variable do i need to set up for haxe and haxelib to make it work in non-standard setups, like I have here - having haxe and libs under the project repository.

so I think it makes sense to add a section describing environment variables that make sense for haxe, like HAXE_STD_PATH

[nadako]

• HAXE_STD_PATH - specifies path to the haxe std library (used by haxe itself)
• HAXELIB_PATH - specifies path for haxelib libraries (used by haxelib)
• HAXEPATH - specifies path to haxe installation (used by haxelib)

[markknol]

In which section should this be documented?

[Yann-P]

I ran into the same problem and nadako's comment helped me. This should be documented on the linux binary download page maybe?

Edit: to put a bit of context, I'm trying to use the 4.0.0-preview.4 linux build that directly contains the binaries. But there is no README to explain which environment variables to set ; adding the directory to the PATH does not look sufficient.