我正在从 VC++ 环境提示符在 Win32 上安装 OpenSSL openssl-0.9.7。当我运行以下命令时：
nmake -f ms\ntdll.mak
我得到以下结果
Microsoft (R) Program Maintenance Utility Version 10.00.30319.01
Copyright (C) Microsoft Corporation. All rights reserved.
Building OpenSSL
copy nul+ .\crypto\buildinf.h tmp32dll\buildinf.h
nul
.\crypto\buildinf.h
1 file(s) copied.
cl /Fotmp32dll\cryptlib.obj -Iinc32 -Itmp32dll /MD /W3 /WX /G5 /Ox /O2
/Ob2 /Gs0 /GF /Gy /nologo -DOPENSSL_SYSNAME_WIN32 -DWIN32_LEAN_AND_MEAN -DL_ENDI
AN -DDSO_WIN32 -DBN_ASM -DMD5_ASM -DSHA1_ASM -DRMD160_ASM /Fdout32dll -DOPENSSL_
NO_KRB5 -D_WINDLL -DOPENSSL_BUILD_SHLIBCRYPTO -c .\crypto\cryptlib.c
cl : Command line warning D9002 : ignoring unknown option '/G5'
cryptlib.c
C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\errno.h(92) : error C22
20: warning treated as error - no 'object' file generated
C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\errno.h(92) : warning C
4005: 'EADDRINUSE' : macro redefinition
tmp32dll\e_os.h(156) : see previous definition of 'EADDRINUSE'
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 10.0\VC\BI
N\cl.EXE"' : return code '0x2'
Stop.
我正在使用 Visual Studio 2010。问题是什么以及如何解决？