Re: MinGW build broken with O_CLOEXEC undeclared

[Paul Eggert]

On 3/8/20 12:53 AM, martin rudalics wrote:
> Compiling master is currently broken on my Windows XP (MinGW gcc 4.8.1) as below
>
> ../../lib/futimens.c:31:1: warning: no previous prototype for 'futimens' 
> [-Wmissing-prototypes]
>   futimens (int fd, struct timespec const times[2])

Yes, I assume this is a consequence of the patch for Bug#39773 being installed.
The MinGW port will need to make sure that futimens and utimensat work, 
presumably by breaking apart fdutimens (which is no longer needed).

> ../../lib/open.c:127:49: error: 'O_CLOEXEC' undeclared (first use in this function) 

Did the MinGW port formerly compile open.c? If so, why is O_CLOEXEC undeclared 
now when it was declared formerly? If not, why is the MinGW port compiling 
open.c now?