[Bug]: exclusion of powerpc from libpng

[BODAPATIMAHESH]

What Operating System(s) are you seeing this problem on?

Linux (x86-64)

dlib version

master

Python version

No response

Compiler

GCC 11

Expected Behavior

powerpc specific source files should be part of libpng 1.6.37 version.

Current Behavior

libpng 1.6.37 does include support for PowerPC, but I don’t see any PowerPC-specific source files in the current dlib setup. Could you clarify why those files were excluded?

We’d like to leverage the PowerPC-specific optimizations for onnxruntime-extensions. If there isn’t a specific reason for their exclusion or deprecation, could you consider adding back the PowerPC-specific files that are present in the official libpng release?

Steps to Reproduce

Please check https://github.com/davisking/dlib/tree/master/dlib/external/libpng

Anything else?

No response

[davisking]

You should link to whatever version of libpng you want to use in your application. Dlib is not a package manager, so it's up to users to use whatever version of libpng they want. The copy in dlib is there only as a fall back for user convenience. Mostly for windows users that don't know what they are doing and so have no idea how to go get libpng themselves honestly. E.g. for students that are just learning to program. That kind of thing. Most users should install the system copy of libpng and use that instead.

[dlib-issue-bot]

Warning: this issue has been inactive for 35 days and will be automatically closed on 2026-05-22 if there is no further activity.

If you are waiting for a response but haven't received one it's possible your question is somehow inappropriate. E.g. it is off topic, you didn't follow the issue submission instructions, or your question is easily answerable by reading the FAQ, dlib's official compilation instructions, dlib's API documentation, or a Google search.

[dlib-issue-bot]

Warning: this issue has been inactive for 42 days and will be automatically closed on 2026-05-22 if there is no further activity.

If you are waiting for a response but haven't received one it's possible your question is somehow inappropriate. E.g. it is off topic, you didn't follow the issue submission instructions, or your question is easily answerable by reading the FAQ, dlib's official compilation instructions, dlib's API documentation, or a Google search.