On Tuesday, 21 December 2021 at 19:49:26 UTC, Steven
Schveighoffer wrote:
If this is a compiler-supplied version, then I don't think you
are allowed to set it explicitly.
moreover... commented out in condig.d like this:
```d
version (FreeBSD_12) enum __FreeBSD_version = 1202000;
//else version (FreeBSD_11) enum __FreeBSD_version = 1104000;
//else version (FreeBSD_10) enum __FreeBSD_version = 1004000;
//else version (FreeBSD_9) enum __FreeBSD_version = 903000;
//else version (FreeBSD_8) enum __FreeBSD_version = 804000;
//else static assert(false, "Unsupported version of FreeBSD");
```
and...
```
@bsd:~/d> dmd freebsdver
/usr/include/d/dmd/core/sys/posix/sys/types.d(201): Error:
undefined identifier `__FreeBSD_version`
/usr/include/d/dmd/core/sys/posix/stdio.d(393): Error: undefined
identifier `__FreeBSD_version`
/usr/include/d/dmd/core/sys/freebsd/sys/event.d(42): Error:
undefined identifier `__FreeBSD_version`
/usr/include/d/dmd/core/sys/freebsd/sys/event.d(173): Error:
undefined identifier `__FreeBSD_version`
```
