[Bug 55863] New: Wine fails to build on macOS with LLVM 17

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55863

Bug ID: 55863
           Summary: Wine fails to build on macOS with LLVM 17
           Product: Wine
           Version: 8.19
          Hardware: x86-64
                OS: Mac OS X
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]

When building Wine on macOS with LLVM 17 (i.e. from Homebrew), the build fails
with:

clang -arch x86_64 -m64 -c -o dlls/ntdll/unix/signal_x86_64.o
../dlls/ntdll/unix/signal_x86_64.c -Idlls/ntdll -I../dlls/ntdll -Iinclude \
  -I../include -D__WINESRC__ -D_NTSYSTEM_ -D_ACRTIMP= -DWINBASEAPI=
-DWINE_UNIX_LIB -Wall -pipe \
  -fcf-protection=none -fno-stack-protector -fno-strict-aliasing
-Wdeclaration-after-statement \
  -Wempty-body -Wignored-qualifiers -Winit-self -Wno-pragma-pack
-Wstrict-prototypes -Wtype-limits \
  -Wunused-but-set-parameter -Wvla -Wwrite-strings -Wpointer-arith -gdwarf-4
-fPIC \
  -fasynchronous-unwind-tables -g -O2 -fPIC -Wall -Wdeclaration-after-statement
-Wwrite-strings -Wtype-limits -march=core2 -mfpmath=sse -U_FORTIFY_SOURCE
-D_FORTIFY_SOURCE=0
In file included from ../dlls/ntdll/unix/signal_x86_64.c:81:
../dlls/ntdll/unix/dwarf.h:915:45: warning: taking the absolute value of
unsigned type 'ULONG_PTR' (aka 'unsigned long') has no effect
[-Wabsolute-value]
  915 |         case DW_OP_abs:         stack[sp] = labs(stack[sp]); break;
      |                                             ^
../dlls/ntdll/unix/dwarf.h:915:45: note: remove the call to 'labs' since
unsigned values cannot be negative
  915 |         case DW_OP_abs:         stack[sp] = labs(stack[sp]); break;
      |                                             ^~~~
<inline asm>:159:2: error: invalid CFI advance_loc expression
  159 |         .cfi_escape 0x10, 0x03, 0x02, 0x72, 0x08
      |         ^
<inline asm>:362:2: error: invalid CFI advance_loc expression
  362 |         .cfi_escape 0x10, 0x03, 0x02, 0x72, 0x08
      |         ^
1 warning and 2 errors generated.
make: *** [dlls/ntdll/unix/signal_x86_64.o] Error 1

This is caused by a recent LLVM change to "reject CFI advance_loc separated by
a non-private label for Mach-O":

https://reviews.llvm.org/D153167

I believe the lines causing errors are '__ASM_CFI_REG_IS_AT1(rbx, rcx, 0x08)'
in __wine_syscall_dispatcher and '__ASM_CFI_REG_IS_AT1(rbx, rcx, 0x08)' in
__wine_unix_call_dispatcher, but it's not specifically those lines, the problem
is all the CFI advance_loc calls in those functions after the .globl labels.