c89 will not build 5.9 on Solaris

On FreeBSD

configure with CC=c89 fails
  CC='cc -std=c89' is overridden by configure with -std=gnu11

On 3/12/2024 16:44, Clinton Bunch wrote:
>
> I was looking at the development guide and saw this:
>
> The primary language is ANSI C as defined by the 1989 standard, but the
>    code should always be compatible with late K&R era compilers ("The C
>    Programming Language" 1st edition, plus "void" and "enum").  There are
>    many hacks to avoid the need to actually restrict the code to K&R C --
>    check out the configure tests -- but always bear the compatibility
>    requirements in mind.  In particular, preprocessing directives must
>    have the "#" unindented, and string pasting is not available.
>
> 5.9 does not compile with gcc's c89 on EL 8 or 9 (Rocky specifically).
> I intend to test FreeBSD and Solaris as well, but haven't yet.
>
> I will point out the C99 standard is now a quarter century old. I 
> propose that we update the development guide to remove the bit about 
> the 1989 standard (much less K&R compatibility) since it is no longer 
> true, and I personally question if it even makes sense as a goal 30+ 
> years in to development.