How to Successfully Compile gopacket on Windows 64-bit: A Step-by-Step Solution

Compiling gopacket on Windows 64-bit: A Comprehensive Guide

Problem:

Unable to compile gopacket on Windows 10 in 64-bit mode (GOARCH=amd64), despite successful compilation in 32-bit mode (GOARCH=386). The error encountered is:

c:/WpdPack/Lib/x64/wpcap.lib: error adding symbols: File in wrong format
collect2.exe: error ld returned 1 exit status

Solution:

To successfully compile gopacket on Windows 64-bit, the following steps are essential:

1. Install Required Components:

   • Install go_amd64 and add it to your PATH.
   • Install TDM GCC x64 and add its binaries to your PATH.
   • Add TDM-GCCx86_64-w64-mingw32bin to your PATH.
   • Install Winpcap.

2. Generate Missing Static Libraries:

   • Download the Winpcap Developers' Pack and extract it to C:.
   • Copy wpcap.dll and packet.dll from c:windowssystem32 to a temporary folder.
   • Generate .def files by running gendef wpcap.dll and gendef packet.dll.

   • Create libwpcap.a and libpacket.a static libraries using dlltool commands:

     • dlltool --as-flags=--64 -m i386:x86-64 -k --output-lib libwpcap.a --input-def wpcap.def
     • dlltool --as-flags=--64 -m i386:x86-64 -k --output-lib libpacket.a --input-def packet.def
   • Copy both generated .a files to c:WpdPackLibx64.

3. Compilation:

   • With these preparations completed, gopacket should now compile without errors.

Additional Notes:

• The provided solution requires the installation of TDM GCC x64, which provides necessary tools for 64-bit compilation on Windows.
• Copying wpcap.dll and packet.dll to a temporary folder is essential as Admin privileges may be required to run gendef on them in their system locations.
• Ensure that all paths are correctly set and that necessary variables (e.g., GOARCH) are appropriately specified.

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