In win32.c there is a function definition

DllExport int
win32_open_osfhandle(intptr_t handle, int flags)
{
#ifdef USE_FIXED_OSFHANDLE
    if (IsWin95())
    return my_open_osfhandle(handle, flags);
#endif
    return _open_osfhandle(handle, flags);
}
[download]

Which since I'm not using Win95 (is anyone anymore?), suggests I should have an _open_osfhandle() definition somewhere. But a grep of the sources shows no such thing:

\perl\src\perl-5.8.8\lib\CORE\perlhost.h:    return win32_open_osfhand
+le(osfhandle, flags);
\perl\src\perl-5.8.8\lib\CORE\win32.h:/* Define USE_FIXED_OSFHANDLE to
+ fix MSVCRT's _open_osfhandle() on W95.
\perl\src\perl-5.8.8\lib\CORE\win32iop.h:DllExport  int         win32_
+open_osfhandle(intptr_t handle, int flags);
\perl\src\perl-5.8.8\lib\CORE\win32iop.h:#define _open_osfhandle      
+          win32_open_osfhandle
\perl\src\perl-5.8.8\makedef.pl:                            win32_open
+_osfhandle
\perl\src\perl-5.8.8\makedef.pl:                        nw_open_osfhan
+dle
\perl\src\perl-5.8.8\NetWare\nw5.c:nw_open_osfhandle(long handle, int 
+flags)
\perl\src\perl-5.8.8\NetWare\nw5iop.h:int               nw_open_osfhan
+dle(long handle, int flags);
\perl\src\perl-5.8.8\NetWare\nwperlhost.h:    return nw_open_osfhandle
+(osfhandle, flags);
\perl\src\perl-5.8.8\NetWare\nwperlsys.h:    return nw_open_osfhandle(
+osfhandle, flags);
\perl\src\perl-5.8.8\win32\perldll.def: win32_open_osfhandle
\perl\src\perl-5.8.8\win32\perlhost.h:    return win32_open_osfhandle(
+osfhandle, flags);
\perl\src\perl-5.8.8\win32\win32.c:*int my_open_osfhandle(intptr_t osf
+handle, int flags) - open C Runtime file handle
\perl\src\perl-5.8.8\win32\win32.c:    int fh = _open_osfhandle((intpt
+r_t)hF, 0);
\perl\src\perl-5.8.8\win32\win32.c:my_open_osfhandle(intptr_t osfhandl
+e, int flags)
\perl\src\perl-5.8.8\win32\win32.c:                int fd = win32_open
+_osfhandle((intptr_t)fh, 0);
\perl\src\perl-5.8.8\win32\win32.c:win32_open_osfhandle(intptr_t handl
+e, int flags)
\perl\src\perl-5.8.8\win32\win32.c:    return my_open_osfhandle(handle
+, flags);
\perl\src\perl-5.8.8\win32\win32.c:    return _open_osfhandle(handle, 
+flags);
\perl\src\perl-5.8.8\win32\win32.h:/* Define USE_FIXED_OSFHANDLE to fi
+x MSVCRT's _open_osfhandle() on W95.
\perl\src\perl-5.8.8\win32\win32io.c:        fd = win32_open_osfhandle
+((intptr_t) h, PerlIOUnix_oflags(tmode));
\perl\src\perl-5.8.8\win32\win32io.c:        int fd = win32_open_osfha
+ndle((intptr_t) new, PerlIOUnix_oflags(PerlIO_modestr(o,mode)));
\perl\src\perl-5.8.8\win32\win32iop.h:DllExport  int            win32_
+open_osfhandle(intptr_t handle, int flags);
\perl\src\perl-5.8.8\win32\win32iop.h:#define _open_osfhandle         
+  win32_open_osfhandle
\perl\src\perl-5.8.8\win32\win32sck.c:# define OPEN_SOCKET(x)   win32_
+open_osfhandle(x,O_RDWR|O_BINARY)
\perl\src\perl-5.8.8\wince\perlhost.h:    return win32_open_osfhandle(
+osfhandle, flags);
\perl\src\perl-5.8.8\wince\win32.h:/* Define USE_FIXED_OSFHANDLE to fi
+x MSVCRT's _open_osfhandle() on W95.
\perl\src\perl-5.8.8\wince\win32io.c:  fd = win32_open_osfhandle((intp
+tr_t) h, PerlIOUnix_oflags(tmode));
\perl\src\perl-5.8.8\wince\win32io.c:   int fd = win32_open_osfhandle(
+(intptr_t) new, PerlIOUnix_oflags(PerlIO_modestr(o,mode)));
\perl\src\perl-5.8.8\wince\win32iop.h:DllExport  int            win32_
+open_osfhandle(long handle, int flags);
\perl\src\perl-5.8.8\wince\win32iop.h:#define _open_osfhandle         
+  win32_open_osfhandle
\perl\src\perl-5.8.8\wince\wince.c:             int fd = win32_open_os
+fhandle((intptr_t)fh, 0);
\perl\src\perl-5.8.8\wince\wince.c:win32_open_osfhandle(intptr_t osfha
+ndle, int flags)
\perl\src\perl-5.8.8\wince\wince.c:    Perl_croak_nocontext("win32_ope
+n_osfhandle() TBD on this platform");
[download]

The only resolution for win32_open_osfhandle() I can see is

\perl\src\perl-5.8.8\win32\win32iop.h:#define _open_osfhandle         
+  win32_open_osfhandle
[download]

Which doesn't help much. What am I missing?