Test DWARF5 support in dsymutil. Currently this still generates an empty dSYM.

$ cat dwarf5.c
__attribute__ ((optnone))
int foo() {
  volatile i;
  return i;
}

int main(int argc, char** argv) {
  return foo();
}

$ clang -gdwarf-5 dwarf5.c -c -o dwarf5.o
$ clang dwarf5.o -o dwarf5.out

RUN: dsymutil -oso-prepend-path %p/../Inputs %p/../Inputs/private/tmp/dwarf5/dwarf5.out -o %t.dSYM 2>&1 | FileCheck %s --allow-empty
RUN: llvm-dwarfdump --verify %t.dSYM 2>&1 | FileCheck %s
CHECK-NOT: error:

RUN: llvm-dwarfdump %t.dSYM | FileCheck %s --check-prefix DWARF
DWARF: DW_TAG_compile_unit
DWARF:   DW_AT_producer    ("clang version 12.0.0
DWARF:   DW_AT_language    (DW_LANG_C99)
DWARF:   DW_AT_name        ("dwarf5.c")
DWARF:   DW_AT_LLVM_sysroot        ("/")
DWARF:   DW_AT_stmt_list   (0x00000000)
DWARF:   DW_AT_comp_dir    ("/private/tmp/dwarf5")
DWARF:   DW_AT_low_pc      (0x0000000100003f80)
DWARF:   DW_AT_high_pc     (0x0000000100003fb1)
DWARF:   DW_AT_addr_base   (0x00000008)
DWARF:   DW_TAG_subprogram
DWARF:     DW_AT_name      ("foo")
DWARF:     DW_AT_decl_file (0x00)
DWARF:     DW_AT_decl_line (2)
DWARF:     DW_AT_type      (0x0000006c "int")
DWARF:     DW_AT_external  (true)
DWARF:     DW_TAG_variable
DWARF:       DW_AT_name    ("i")
DWARF:       DW_AT_decl_file       (0x00)
DWARF:       DW_AT_decl_line       (3)
DWARF:       DW_AT_type    (0x00000073 "volatile int")
DWARF:   DW_TAG_subprogram
DWARF:     DW_AT_name      ("main")
DWARF:     DW_AT_decl_file (0x00)
DWARF:     DW_AT_decl_line (7)
DWARF:     DW_AT_prototyped        (true)
DWARF:     DW_AT_type      (0x0000006c "int")
DWARF:     DW_AT_external  (true)
DWARF:     DW_TAG_formal_parameter
DWARF:       DW_AT_name    ("argc")
DWARF:       DW_AT_decl_file       (0x00)
DWARF:       DW_AT_decl_line       (7)
DWARF:       DW_AT_type    (0x0000006c "int")
DWARF:     DW_TAG_formal_parameter
DWARF:       DW_AT_name    ("argv")
DWARF:       DW_AT_decl_file       (0x00)
DWARF:       DW_AT_decl_line       (7)
DWARF:       DW_AT_type    (0x00000078 "char**")