Re: [sdcc-devel] Changing the default option from --std-sdcc89 to --std-c99

[Maarten B. <sou...@ds...>]

Hi,

I have no problem with making the 99 version the default, but I doubt
whether disabling sdcc extensions by default is desirable. And I know of
no compiler that has its extensions disabled by default, be it commercial
or free. So to be clear, my vote is for --std-sdcc99.

Maarten

> Currently, sdcc defaults to --std-sdcc89.
> I suggest to change this to --std-c99 (and also compile the std lib
> using that option instead of --std-sdcc99).
>
> IMO, --std-c99 is a good default value (i.e. something reasonable for
> users that haven't read all of the manual):
>
> 1) It seems the omission of integer promotion on explicitly cast
> arguments of vararg functions isn't going away anytime soon (at least
> Maarten seems to be in favor of keeping it). Omitting them by default
> seems dangerous to me, since it can break standard-conforming code. This
> means --std-c89 or --std-c99 would be ok default values.
>
> 2) Some of the functions in the standard library use inline versions
> when user code is compiled using --std-c99 or --std-sdcc99. Thus
> increasing the default standard version from C89/C90 to C99 results in
> better code being generated by default.
>
> Philipp