Compilation Error with go-fitz and Homebrew-installed MuPDF due to Type Mismatch

[hiyced]

I am encountering a compilation error when trying to build a Go project that depends on github.com/gen2brain/go-fitz (v1.24.15). The error occurs specifically when linking against the MuPDF library installed via Homebrew (version 1.26.10).

Error Message:
# github.com/gen2brain/go-fitz ../../../../pkg/mod/github.com/gen2brain/go-fitz@v1.24.15/fitz_cgo.go:546:103: cannot use _Ctype_int(len(buf)) (value of int32 type _Ctype_int) as _Ctype_size_t value in variable declaration

Environment Details:

• Local MuPDF Version: 1.26.10 (installed via Homebrew)
• go-fitz Version: v1.24.15
• System: macOS 15.6.1

Analysis:
The error indicates a type mismatch in the CGo code of go-fitz. The code is trying to assign a value of type _Ctype_int (which is an int32 in this context) to a variable expecting _Ctype_size_t (typically size_t, an unsigned type whose size may vary by platform). This suggests a potential incompatibility between the expected types in the go-fitz wrapper and the actual types used by the MuPDF library installed via Homebrew.

Possible Causes:

1. The Homebrew version of MuPDF (1.26.10) may have introduced changes in type definitions or API signatures that are not yet handled by the current version of go-fitz.
2. The go-fitz wrapper may not fully support the latest MuPDF version, as it was likely tested against an older version of MuPDF.
3. There might be platform-specific differences in type sizes (e.g., size_t vs. int) between the environment where go-fitz was developed and the Homebrew build of MuPDF.

Request:
I would appreciate guidance on how to resolve this compilation issue. Possible solutions could include:

• Updating go-fitz to a newer version compatible with MuPDF 1.26.10.
• Modifying the go-fitz CGo code to handle the type mismatch appropriately.
• Using a specific version of MuPDF that is known to work with go-fitz v1.24.15.

Thank you for your support!

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