Shall do ... though it's not looking all that promising. I'm currently stuck on the following error that occurs (fairly early) when running dmake: 
del /f config.h
copy config_H.gc config.h
        1 file(s) copied.
cd .. && miniperl configpm
Invalid type 'Q' in pack at lib/Config_heavy.pl line 1088.
Compilation failed in require at configpm line 777.
dmake:  Error code 255, while making '..\lib\Config.pm'
dmake:  '..\lib\Config.pm' removed.

[download]
I've so far made the following amendments to config.gc: 
d_casti32        to 'undef'
d_longlong        to 'define'
d_quad            to 'define'
i_inttypes        to 'define'
ivsize            to '8'
ivtype            to 'long long'
nv_preserves_uv_bits    to '53'
quadkind        to '3'
use64bitint        to 'define'

[download]
Looks like there's a bit more to do, yet :-)
Did anyone associated with the Vanilla/Strawberry Perl project ever investigate this ?

Cheers,
Rob

In reply to Re^2: Win32, MinGW and -Duse64bitint by syphilis
in thread Win32, MinGW and -Duse64bitint by syphilis

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