Configuring for VC-WIN32 no-gmp [default] OPENSSL_NO_GMP (skip dir) no-jpake [experimental] OPENSSL_NO_JPAKE (skip dir) no-krb5 [krb5-flavor not specified] OPENSSL_NO_KRB5 no-md2 [default] OPENSSL_NO_MD2 (skip dir) no-rc5 [default] OPENSSL_NO_RC5 (skip dir) no-rfc3779 [default] OPENSSL_NO_RFC3779 (skip dir) no-shared [default] no-store [experimental] OPENSSL_NO_STORE (skip dir) no-zlib [default] no-zlib-dynamic [default] IsMK1MF=1 CC =cl CFLAG =-DOPENSSL_THREADS -DDSO_WIN32 -W3 -WX -Gs0 -GF -Gy -nologo -DOPENSSL_SYSNAME_WIN32 -DWIN32_LEAN_AND_MEAN -DL_ENDIAN ... < more of the definitions here > EX_LIBS = CPUID_OBJ =x86cpuid.o BN_ASM =bn-586.o co-586.o x86-mont.o DES_ENC =des-586.o crypt586.o AES_ENC =aes-586.o BF_ENC =bf-586.o CAST_ENC =cast-586.o RC4_ENC =rc4-586.o RC5_ENC =rc5-586.o MD5_OBJ_ASM =md5-586.o SHA1_OBJ_ASM =sha1-586.o sha256-586.o sha512-586.o RMD160_OBJ_ASM=rmd-586.o CMLL_ENC= =cmll-x86.o PROCESSOR = RANLIB =true ARFLAGS = PERL =perl THIRTY_TWO_BIT mode BN_LLONG mode RC4_INDEX mode RC4_CHUNK is undefined Configured for VC-WIN32.If you look at the CFLAG values, you will find -DOPENSSL_SYSNAME_WIN32, this actually disable the #include in the o_str.c If look into the file o_str.c, you’ll see:
#if !defined(OPENSSL_IMPLEMENTS_strncasecmp) && \ !defined(OPENSSL_SYSNAME_WIN32) && \ !defined(NETWARE_CLIB) # include #endifSo two checks here. First make sure you are running the command under Visual Studio Command Prompt and the CFLAG has the mentioned flag. Also, you can open up the Configure file in the OpenSSL folder. Do a find on “OPENSSL_SYSNAME_WIN32″, you will see it in VC-WIN32 target. You can add it there or re-download the OpenSSL if it’s not there. Hope it helps.