Try exporting CC for ARM64

wine.spec

@@ -699,6 +699,12 @@ sed -i -e 's!^loader server: libs/port libs/wine tools.*!& include!' Makefile.in
 # http://bugs.winehq.org/show_bug.cgi?id=25073
 export CFLAGS="`echo $RPM_OPT_FLAGS | sed -e 's/-Wp,-D_FORTIFY_SOURCE=2//'` -Wno-error"
 
+%ifarch aarch64
+# ARM64 now requires clang
+# https://source.winehq.org/git/wine.git/commit/8fb8cc03c3edb599dd98f369e14a08f899cbff95
+export CC="/usr/bin/clang"
+%endif
+
 %configure \
  --sysconfdir=%{_sysconfdir}/wine \
  --x-includes=%{_includedir} --x-libraries=%{_libdir} \