Scott: I'm just looking for Pascal compilers that run on macOS. My programs follow the original compilers in which the files listed at the top of the program are directly read and written to by the Pascal program. GPC used to do this. P2C (which I maintain apparently) translates to C and then provides this. I don't know what ISO that corresponds to.

For your second point, I assume you are talking about the Pascal-P1-P6 thing? (not sure I understand your point about "name change breaks the code")

I write scripts that call compilers with the parameters needed to compile my programs. If the name of the compiler changes then the scripts break. For example, if the Unix 'ls' command were named ls763 and then a new version were named ls764 lots of code would break.

Can Pascal-P be used on the Mac? Well, actually yes. Pascal-P6 includes sufficient tooling to port without GPC (see the interpreter written in C). I don't really push that capability because P6 is still in development, and also because interpreters are not really my thing (yes, I know that sounds funny). I like compilers. To me interpreters are more of a fun toy than not, although I note that there is a group pushing interpreters as "VM"s for professional use. Pascal-P5 has actually been written up as such. Again, not bad, just not my thing.

Ok, maybe when P6 is stablized and GPC independent it can be used to compile on macOS.

I should mention there is a branch from P5 known as P5c that that changed the compiler into a Pascal to C translator that accomplishes porting in a different way. You would have to look into that yourself, I'm not really up to speed on that.

That's interesting, thanks. https://sourceforge.net/projects/pascal-p5c/ Tom Thomas D. Schneider, Ph.D. Senior Investigator National Institutes of Health National Cancer Institute Center for Cancer Research RNA Biology Laboratory Biological Information Theory Group Frederick, Maryland 21702-1201 schneidt@mail.nih.gov https://alum.mit.edu/www/toms