On Wed, 14 Nov 2007, Justin C. Sherrill wrote:

> In file included from ./tag.h:25,
>                  from layouts/floating.c:22:
> /usr/include/regex.h:47: error: syntax error before "regoff_t"
> /usr/include/regex.h:51: error: syntax error before "size_t"
> /usr/include/regex.h:57: error: syntax error before "regoff_t"
> /usr/include/regex.h:101: error: syntax error before "regerror"
> /usr/include/regex.h:101: error: syntax error before "size_t"
> /usr/include/regex.h:103: error: syntax error before "size_t"
> *** Error code 1

Maybe that tag.h or layouts/floating.c need to include stdio.h or 
sys/types.h.

Also the DragonFly regex(3) man page says:

     #include <sys/types.h>
     #include <regex.h>