Another example, I use my own BOOL type that on an 8051 is a bit var, but on other CPU's is an unsigned char. So for the return val of a function it's handy to just do something like:

BOOL LcdInit(params...);
However, I can see no way LcdInit can be 'portable'. BOOL can be individually defined even without #if/#ifdef (I do such by including adef in builda, bdef in build b etc).

I am definitely not arguing against "code reuse" and neither am I arguing against a thing like your 'BOOL'. What I am arguang against is these "heroic measures" some insist on taking to make code without modification (save a #define) compile by Keil for a '51, compile by HiTech for a PIG, compile by IAR for an AVR, compile by .... for .... .

I am constantly reusing code and some slides in seamlessly some need a bit of attention, but none is written with attention to the explicit purpose of reuse. That it all end up being reusable is just wonderful.

Erik