qemu @9.0.2: error: initializing 'NSEdgeInsets' (aka 'struct NSEdgeInsets') with an expression of incompatible type 'id'

[RobertPHeller (Robert Heller)]

I am trying to install qemu:

sudo port install qemu

and I am getting an error:

:info:build FAILED: libcommon.fa.p/ui_cocoa.m.o 
:info:build /usr/bin/clang -m64 -mcx16 -Ilibcommon.fa.p -Isubprojects/dtc/libfdt -I../qemu-9.0.2/subprojects/dtc/libfdt -I/opt/local/include/p11-kit-1 -I/opt/local/include/pixman-1 -I/opt/local/include/libpng16 -I/opt/local/include/spice-server -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/libexec/openssl3/include -I/opt/local/include/spice-1 -I/opt/local/include/libusb-1.0 -I/opt/local/include/gio-unix-2.0 -I/opt/local/include/slirp -fdiagnostics-color=auto -Wall -Winvalid-pch -std=gnu11 -O2 -g -Wempty-body -Wendif-labels -Wexpansion-to-defined -Wformat-security -Wformat-y2k -Wignored-qualifiers -Winit-self -Wmissing-format-attribute -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wredundant-decls -Wstrict-prototypes -Wtype-limits -Wundef -Wvla -Wwrite-strings -Wno-gnu-variable-sized-type-not-at-end -Wno-initializer-overrides -Wno-missing-include-dirs -Wno-shift-negative-value -Wno-string-plus-int -Wno-tautological-type-limit-compare -Wno-typedef-redefinition -iquote . -iquote /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_emulators_qemu/qemu/work/qemu-9.0.2 -iquote /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_emulators_qemu/qemu/work/qemu-9.0.2/include -iquote /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_emulators_qemu/qemu/work/qemu-9.0.2/host/include/x86_64 -iquote /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_emulators_qemu/qemu/work/qemu-9.0.2/host/include/generic -iquote /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_emulators_qemu/qemu/work/qemu-9.0.2/tcg/i386 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-strict-aliasing -fno-common -fwrapv -fno-pie -pipe -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -arch x86_64 -D_DARWIN_C_SOURCE -DNCURSES_WIDECHAR -DNCURSES_WIDECHAR=1 -DSTRUCT_IOVEC_DEFINED -MD -MQ libcommon.fa.p/ui_cocoa.m.o -MF libcommon.fa.p/ui_cocoa.m.o.d -o libcommon.fa.p/ui_cocoa.m.o -c ../qemu-9.0.2/ui/cocoa.m
:info:build ../qemu-9.0.2/ui/cocoa.m:542:51: warning: instance method '-safeAreaInsets' not found (return type defaults to 'id') [-Wobjc-method-access]
:info:build     NSEdgeInsets insets = [[[self window] screen] safeAreaInsets];
:info:build                                                   ^~~~~~~~~~~~~~
:info:build /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSScreen.h:20:12: note: receiver is instance of class declared here
:info:build @interface NSScreen : NSObject
:info:build            ^
:info:build ../qemu-9.0.2/ui/cocoa.m:542:18: error: initializing 'NSEdgeInsets' (aka 'struct NSEdgeInsets') with an expression of incompatible type 'id'
:info:build     NSEdgeInsets insets = [[[self window] screen] safeAreaInsets];
:info:build                  ^        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build 1 warning and 1 error generated.
:info:build [1076/3645] /usr/bin/clang -m64 -mcx16 -Ilibcommon.fa.p -Isubproject

[ryandesign (Ryan Carsten Schmidt)]

Theqemu port enables the cocoa variant by default on macOS 10.14 and older. It may be the case that due to changes in the qemu code this variant can no longer build on 10.15. Try building without the cocoa variant:

sudo port clean qemu
sudo port install qemu -cocoa