junk.c
junk.xs(21) : error C2275: 'SV' : illegal use of this type as an expression
        C:\Perl64\lib\CORE\perl.h(2400) : see declaration of 'SV'
junk.xs(21) : error C2065: 'sp' : undeclared identifier
junk.xs(21) : error C2100: illegal indirection
junk.xs(23) : error C2143: syntax error : missing ';' before 'type'
junk.xs(30) : error C2065: 'sp' : undeclared identifier
junk.xs(30) : error C2113: '-' : pointer can only be subtracted from another pointer
junk.xs(33) : error C2065: 'sp' : undeclared identifier
junk.xs(33) : warning C4047: '<' : 'SV **' differs in levels of indirection from 'int'
junk.xs(33) : error C2065: 'sp' : undeclared identifier
junk.xs(33) : error C2065: 'sp' : undeclared identifier
junk.xs(33) : warning C4047: 'function' : 'SV **' differs in levels of indirection from 'int'
junk.xs(33) : warning C4024: 'Perl_stack_grow' : different types for formal and actual parameter 2
junk.xs(33) : error C2065: 'sp' : undeclared identifier
junk.xs(33) : warning C4047: 'function' : 'SV **' differs in levels of indirection from 'int'
junk.xs(33) : warning C4024: 'Perl_stack_grow' : different types for formal and actual parameter 3
junk.xs(33) : warning C4047: '=' : 'int' differs in levels of indirection from 'SV **'
junk.xs(33) : error C2065: 'sp' : undeclared identifier
junk.xs(33) : error C2100: illegal indirection
junk.xs(33) : warning C4047: '=' : 'int' differs in levels of indirection from 'SV *'
junk.xs(33) : error C2106: '=' : left operand must be l-value
junk.xs(36) : error C2065: 'sp' : undeclared identifier
junk.xs(36) : warning C4047: '=' : 'SV **' differs in levels of indirection from 'int'
junk.xs(40) : error C2065: 'count' : undeclared identifier
junk.xs(44) : error C2065: 'sp' : undeclared identifier
junk.xs(44) : warning C4047: '=' : 'int' differs in levels of indirection from 'SV **'
junk.xs(49) : error C2065: 'count' : undeclared identifier
junk.xs(52) : error C2065: 'sp' : undeclared identifier
junk.xs(52) : error C2100: illegal indirection
junk.xs(52) : warning C4047: '=' : 'SV *' differs in levels of indirection from 'int'
junk.xs(52) : warning C4244: '=' : conversion from 'IV' to 'int', possible loss of data
junk.xs(56) : error C2065: 'sp' : undeclared identifier
junk.xs(56) : warning C4047: '=' : 'SV **' differs in levels of indirection from 'int'
NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\Bin\amd64\cl.EXE"' : return code '0x2'
Stop.