undefined: fitz.New about go-fitz

[gen2brain]

You could also use e.g. zig, something like this CGO_ENABLED=1 CC="zig cc -target x86_64-windows-gnu" GOOS=windows, or maybe with clang, i.e. CC="clang --target=x86_64-pc-freebsd" CGO_ENABLED=1 GOOS=freebsd. In go-fitz case, there are no additional libraries that you need to have, all it needs is to link precompiled static library.

[gen2brain]

You are trying to cross-compile the CGO project. Of course, you cannot just change GOOS and be done. When you cross-compile, the Go will disable CGO, i.e. it will set CGO_ENABLED=0, so enable it, i.e. GOOS=linux CGO_ENABLED=1. Then you will see real errors, i.e. you are missing the correct C toolchain.

[MichaelCharles]

Thanks, I made further progress on this since I last commented. My problem has nothing to do with Fitz itself, but as you said, cross compiling. I'd like to post what I ended up doing here in case it ever turns up in someone's Google search results.

I figured the easiest way to get around this would be to build from inside of a Docker container. So I made a Dockerfile like so,

FROM golang:1.21.6

RUN apt-get update

RUN apt-get install -y gcc-x86-64-linux-gnu

ENV CGO_ENABLED=1
ENV CC=x86_64-linux-gnu-gcc

Which includes gcc-x86-64-linux-gnu as a cross compiler, and then built the dockerfile into an image:

docker build -t gobuild:latest .

From there, I used the new image to build my project:

docker run --rm -v "$(CURDIR)":/usr/src/myapp -w /usr/src/myapp gobuild:latest bash -c "export GO111MODULE=on && env GOARCH=amd64 go build  -ldflags=\"-s -w\" -o bin/thumbnail cmd/thumbnail/main.go"

And that let me build without errors! I'm running into a further problem there with my serverless function hanging on invocation, but that is likely an entirely unrelated issue.