I have 40 years experience porting code and Drivers to various OSes and processors...OSes like Freescale MQX, TI DSP Bios, WxWidgets APIs, and/or Linux. Most of my C code is written with the 'write once' philosophy.
I know I shouldn't reply to an obvious troll like this, but this attitude of yours bothers me. I've seen that 'can't be done' attitude fthat you are demonstrating in your post.....quite frankly it sucks.
Saying "easily and effortlessly it will integrate into cross-platforms" does not imply that the software is easy to write to begin with. I was implying that the 98% more effort to consider your approach was actually more work up-front when writing your code.....like maybe making your code 'Modular' to begin with, and also follow the standards that all compilers follow (C programming following ANSI standards for example) rather than picking those shortcuts that, for example, only MS compilers let you use, or the Qt macros that require the MOC compiler (ie - compiler shortcuts that no other compiler for other platforms understand).
I'm sorry you are working 60 hour weeks....I used to do that too, until I learned how to work more efficiently (Write source once again) which lets me work normal business hours. Maybe you should consider the 'Work smarter, not harder philosophy', instead of this 'It can't be done because I can't imagine it philosophy' you seem to have.
And, with your post, you have proven it is you without any experience. Maybe you should back off and learn something?