Building with pdfium warns incompatible pointer type

[jahanford]

Describe the bug
When building with pdfium in an Amazon Linux 2 docker container the make step warns of incompatible point type for the pdfload functions but still successfully completes build.

To Reproduce
Steps to reproduce the behavior:

1. Download pdfium binaries from https://github.com/bblanchon/pdfium-binaries
2. ./configure --with-pdfium-includes=/path/to/pdfium --with-pdfium-libraries=/path/to/lib
3. make
   (I can provide an example dockerfile if required)

Expected behavior
Build to complete without pointer warnings.

Actual behavior
Warnings printed at make step.

Screenshots

Environment

• OS: Windows 10 (Docker Container lambci/lambda)
• Vips 8.9.1

[jcupitt]

Hello @Projkt-James,

Yes, pdfium build has been broken for a while -- libvips has not kept up with changes in pdfium. Some brave person needs to spend an afternoon fixing it.

In the meantime, you need to build against poppler.

[jcupitt]

There's an issue tracking this: #1400

I'll close this one.