Re: gettimeofday.c windows version?

[Paul Eggert]

On 2022-12-11 10:55, Eli Zaretskii wrote:
> my main development machine runs Windows XP.

Yeah, it's sort of like the UCLA CS Dept. still operates a Solaris 10 
sparc server that was long the central platform, and I still keep 
porting to it. I expect MS-Windows XP has more users than Solaris 10 
sparc, even though the Solaris 10 is still commercially supported (by 
Oracle) whereas MS-Windows XP is not (by Microsoft). Although few if any 
ordinary users will run Emacs 30+ on either platform, Emacs still keeps 
being ported to them if only to keep the greybeards happy. :-)


That being said, I'm not quite understanding the underlying issue here. 
Is it that MinGW has "#define _WIN32_WINNT 0x502", which as I understand 
from [1] means MinGW says it assumes MS-Windows Server 2003 and later, 
whereas Eli wants Emacs 30+ to be portable even further back to 
MS-Windows XP (i.e., _WIN32_WINNT == 0x0501)? Or is it more complicated 
than that?

If it's merely the abovementioned issue, Gnulib already in some cases 
ports to _WIN32_WINNT <= 0x501 in some cases, so would it be painful for 
it to do so here too? (But then, I haven't seen a specific patch 
proposed that meets Eli's concerns - perhaps I missed it?)

[1]: 
https://learn.microsoft.com/en-us/cpp/porting/modifying-winver-and-win32-winnt