CN0359 code compilation issue


For my client I have build my own conductivity and pH measurement unit based on CN0359 design

I would like to perform compilation of the CN0359 code but ADuCM360 IDE is no longer available. I have tried do  this by Keil and Eclipse both witch GCC but without succes. With KEIL i have 140 errors mainly due to lack of (or wrong) unistd.h file. In Eclipse everything seems ok but compiler says "nothing to compile" when i want to perform compilation.

Could some one give me a complete toolchain (mayby old ADuCM360 IDE? )witch ready to compilation CN0359 project, or give an instruction how to import CN0359 code to Keil or Eclipse ?