libwebp build failing on macOS x86_64

[dunglas]

See https://github.com/php/frankenphp/actions/runs/20300181338/job/58303577504

@henderkes do you have an idea of what's going on?
Maybe should we stop providing Mac Intel builds at some point?

[henderkes]

/Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/math.h:627:41: error: _Float16 is not supported on this target
627 | extern _Float16 __copysignf16(_Float16, _Float16) __API_AVAILABLE(macos(15.0), ios(18.0), watchos(11.0), tvos(18.0));

Yeah that doesn't make much sense to me.

I think sooner or later we just have to get rid of macos intel and glibc 2.17. The patch list is just too long. @crazywhalecc perhaps you can look at this, I'm not getting an intel mac :P

[crazywhalecc]

Looks like it's a compiler bug, I'll test locally later

[crazywhalecc]

Fixed in main branch.

[dunglas]

Thank you!!