[Bug 58916] New: winemac.drv no longer builds for i386

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58916

Bug ID: 58916
           Summary: winemac.drv no longer builds for i386
           Product: Wine
           Version: 10.18
          Hardware: x86
                OS: MacOS
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P2
         Component: winemac.drv
          Assignee: [e-mail]
          Reporter: [e-mail]

Created attachment 79598
  --> http://bugs.winehq.org/attachment.cgi?id=79598
main.log from MacPorts 10.12 buildbot

/usr/bin/clang -arch i386 -m32 -c -o dlls/winemac.drv/surface.o
dlls/winemac.drv/surface.c -Idlls/winemac.drv -Iinclude -D__WINESRC__ \
  -DWINE_UNIX_LIB -Wall -pipe -fvisibility=hidden -fno-stack-protector
-fno-strict-aliasing \
  -Wdeclaration-after-statement -Wempty-body -Wignored-qualifiers -Winit-self
-Wpointer-arith \
  -Wstrict-prototypes -Wtype-limits -Wvla -Wwrite-strings -fPIC
-fasynchronous-unwind-tables \
  -pipe -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
dlls/winemac.drv/cocoa_window.m:1018:17: error: synthesized property
'contentViewMaskLayer' must either be named the same as a compatible instance
variable or must explicitly name an instance variable
    @synthesize contentViewMaskLayer;

macOS Catalina and later all build without issue only macOS Sierra & macOS High
Sierra are having this issue, macOS Mojave is not listed as MacPorts does not
officially support building for i386 & x86_64 out-of-box but I'd assume it's
the same for this version for the i386 build.