qemu @8.0.4: ERROR: No host machine compiler for 'audio/coreaudio.m'

[barracuda156]

When I try building qemu, I get the following configure error:

../qemu-8.0.4/meson.build:3420:13: ERROR: No host machine compiler for 'audio/coreaudio.m'

I tried to disable coreaudio altogether, passing --disable-coreaudio, but then it fails a step further with:

../qemu-8.0.4/meson.build:3810:58: ERROR: Tried to access compiler for language "objc", not specified for host machine.

Because Meson script coerces Obj C on Darwin:

if targetos == 'darwin'
  summary_info += {'Objective-C compiler': ' '.join(meson.get_compiler('objc').cmd_array())}
endif

Which is probably a bug (if no Cocoa and no Coreaudio, why ObjC?), but regardless of that, why GCC is not acknowledged in the first place?

Macports does pass --objcc=/opt/local/bin/gcc-mp-12.

[DesktopECHO]

I can confirm seeing this issue as well in High Sierra on Intel.

[ryandesign (Ryan Carsten Schmidt)]

It's not specific to PowerPC or GCC; it's specific to disabling the cocoa variant. Their meson build script makes the incorrect assumption that an Objective-C compiler is only required when building the Cocoa UI but it's also required to compile the CoreAudio driver regardless of the UI.

This is an upstream bug and getting it fixed could have been accelerated if someone had reported it to the developers. I've reported it there now: ​https://gitlab.com/qemu-project/qemu/-/issues/2138