Make sure that Configure will defined DSO_WIN32 for the Win32 targets. I feel...

# Windows NT, Microsoft Visual C++ 4.0

"VC-NT","cl:::::BN_LLONG RC4_INDEX ${x86_gcc_opts}:::",

"VC-WIN32","cl:::::BN_LLONG RC4_INDEX ${x86_gcc_opts}:::",

"VC-NT","cl:::::BN_LLONG RC4_INDEX ${x86_gcc_opts}::::::::::win32",

"VC-WIN32","cl:::::BN_LLONG RC4_INDEX ${x86_gcc_opts}::::::::::win32",

"VC-WIN16","cl:::(unknown)::MD2_CHAR DES_UNROLL DES_PTR RC4_INDEX THIRTY_TWO_BIT:::",

"VC-W31-16","cl:::(unknown)::BN_LLONG MD2_CHAR DES_UNROLL DES_PTR RC4_INDEX SIXTEEN_BIT:::",

"VC-W31-32","cl:::::BN_LLONG MD2_CHAR DES_UNROLL DES_PTR RC4_INDEX THIRTY_TWO_BIT:::",

"VC-MSDOS","cl:::(unknown)::BN_LLONG MD2_CHAR DES_UNROLL DES_PTR RC4_INDEX SIXTEEN_BIT:::",

# Borland C++ 4.5

"BC-32","bcc32:::::BN_LLONG DES_PTR RC4_INDEX:::",

"BC-32","bcc32:::::BN_LLONG DES_PTR RC4_INDEX::::::::::win32",

"BC-16","bcc:::(unknown)::BN_LLONG DES_PTR RC4_INDEX SIXTEEN_BIT:::",

# Mingw32

# (Note: the real CFLAGS for Windows builds are defined by util/mk1mf.pl

# and its library files in util/pl/*)

"Mingw32", "gcc:-DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall::::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:",

"Mingw32", "gcc:-DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall::::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}::::::::::win32",

# CygWin32

"CygWin32", "gcc:-DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall::::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:",

"CygWin32", "gcc:-DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall::::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}::::::::::win32",

# Ultrix from Bernhard Simon <simon@zid.tuwien.ac.at>

"ultrix-cc","cc:-std1 -O -Olimit 1000 -DL_ENDIAN::(unknown)::::::",