Using the command line and nmake (VC++ 2010 Express)

Setup the build system

• Download and install Microsoft Visual C++ 2008 Express [1]
• Download and install Microsoft Visual C++ 2010 Express [2]
• Download and install Windows SDK v7.1 [3]
• Download and install ActivePerl v.5.16.3.1604 (x64) for the Make scripts and/or Perl Net-SNMP modules [4]
  Restart Windows!
• Download Win64 OpenSSL v1.0.1j (full), install to C:\OpenSSL [5]
  Probably best to choose "The Windows system directory" during install, when prompted for the location to copy OpenSSL DLLs. Unless you want to modify PATH environment variables and you know what you're doing.
• Download Net-SNMP v5.7.2.1 ZIP [6], extract to path without spaces (e.g. C:\projects\net-snmp-5.7.2.1)

Visual C++ 2010 Express cannot open/convert Visual C++ 6.0 projects.

Use Visual C++ 2008 Express to open C:\projects\net-snmp-5.7.2.1\win32\win32.dsw and convert the Solution and corresponding Projects to a recent Visual Studio version. Afterwards, you can open the resulting Solution with VC++ 2010 Express.

Edit .\snmplib\read_config.c, move line 545 to line 539.

Microsoft Visual C++ does not follow the C99 code standard and therefore does not permit variable declaration in the middle of a code block.

Before:

538: if (when == EITHER_CONFIG || lptr->config_time == when) {
539:            DEBUGMSGTL(("read_config:parser",
540:                        "Found a parser.  Calling it: %s / %s\n", token,
541:                        cptr));
542:            /*
543:             * Make sure cptr is non-null
544:             */
545:            char tmpbuf[1];
546:            if (!cptr) {
547:                tmpbuf[0] = '\0';
548:                cptr = tmpbuf;
549:            }

After:

538: if (when == EITHER_CONFIG || lptr->config_time == when) {
539:            char tmpbuf[1];
540:            DEBUGMSGTL(("read_config:parser",
541:                        "Found a parser.  Calling it: %s / %s\n", token,
542:                        cptr));
543:            /*
544:             * Make sure cptr is non-null
545:             */
546:            if (!cptr) {
547:                tmpbuf[0] = '\0';
548:                cptr = tmpbuf;
549:            }

Build Net-SNMP

Open a command prompt with the correct options:

• cmd /V:ON /E:ON

Set the environment variables for Visual Studio as well as the SDK (modify paths to match your install locations)

• "C:\Program Files\Microsoft SDKs\Windows\v7.1\Bin\setenv.cmd" /release /x64

Set the Visual C++ install directory environment variable to what Net-SNMP expects

• SET VCINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\

Append the following environment variables to include OpenSSL headers and libraries

• SET INCLUDE=%INCLUDE%;C:\OpenSSL\include
• SET LIB=%LIB%;C:\OpenSSL\lib\VC\static

Run the build script

• c:\projects\net-snmp-5.7.2.1\win32\build.bat

Change the following options to "enable" the corresponding features

• 1 OpenSSL support enabled
• 2 Platform SDK support enabled
• 5 Perl modules enabled
• 6 Install perl modules enabled
• 9 IPv6 transports enabled
• 10 winExtDLL agent enabled
• 11 Link type static

Press 'F', followed by Enter to finish and start building.

Common Issues

• The build process fails while running Perl module tests. Restart Windows after installing ActivePerl