Use of access(X_OK) check in pg_upgrade

I broke the Win32 build members by using access(X_OK) in pg_upgrade. I
have a fix for this but looking at pg_upgrade's exec.c, I see for
Win32:

if ((buf.st_mode & S_IXUSR) == 0)

I am confused why Windows supports S_IXUSR but not X_OK.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +