Why Am I Getting the '64-bit Mode Not Compiled In' Error When Using C in Go?

Why Did I Receive an Error Message Stating "64-bit Mode Not Compiled In"?

When attempting to incorporate C code into a Go project, an error message stating "sorry, unimplemented: 64-bit mode not compiled in" may arise. This error typically occurs when the compiler used to build the Go project is not compatible with the 64-bit architecture of the target system.

Troubleshooting the Issue

To resolve this error, the following steps can be taken:

1. Check the Compiler Version

Ensure that the compiler used to build the Go project supports the target system's architecture. For a 64-bit Windows OS, verify that the compiler used is a 64-bit version, such as tdm64-gcc-5.1.0-2.exe or MinGW-w64 x64-4.8.1-release-posix-seh-rev5.

2. Adjust Path Variables

Add the path to the 64-bit compiler to the system's PATH environment variable. This ensures that the compiler will be used during the build process.

3. Remove Conflicting Compilers

If multiple compilers are installed on the system, ensure that only the intended compiler is included in the PATH variable. Conflicting compilers can cause the error to occur.

Recommended Solutions

1. Install tdm64-gcc-5.1.0-2.exe

This compiler has been found to be compatible with both 32-bit and 64-bit Go builds on 64-bit Windows OS.

2. Use MinGW-w64

MinGW-w64 is another suitable option for building Go projects on 64-bit Windows OS, but it supports 64-bit builds exclusively.

Conclusion

By following these recommendations, the error "sorry, unimplemented: 64-bit mode not compiled in" can be resolved, allowing for seamless integration of C code into Go projects.

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