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Note (probably harmless): No library found for -lcrypto
Writing Makefile for Crypt::OpenSSL::Bignum

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

cp Bignum.pm blib\lib\Crypt\OpenSSL\Bignum.pm
cp Bignum/CTX.pm blib\lib\Crypt\OpenSSL\Bignum\CTX.pm
	C:\cpanrun\build\5-10-0\bin\perl.exe C:\cpanrun\build\5-10-0\lib\ExtUtils\xsubpp  -typemap C:\cpanrun\build\5-10-0\lib\ExtUtils\typemap -typemap typemap  Bignum.xs > Bignum.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv Bignum.xsc Bignum.c
	cl -c    -nologo -GF -W3 -MD -Zi -DNDEBUG -O1 -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DUSE_SITECUSTOMIZE -DPRIVLIB_LAST_IN_INC -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO -DPERL_MSVCRT_READFIX -MD -Zi -DNDEBUG -O1    -DVERSION=\"0.04\"  -DXS_VERSION=\"0.04\"  "-IC:\cpanrun\build\5-10-0\lib\CORE"  -DPERL5 -DOPENSSL_NO_KRB5 Bignum.c
Bignum.c
Bignum.xs(5) : fatal error C1083: Cannot open include file: 'openssl/ssl.h': No such file or directory
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.