llvm/llvm/test/Object/Inputs/COFF/weak-externals.yaml

--- !COFF
header:
  Machine:         IMAGE_FILE_MACHINE_ARMNT
  Characteristics: [  ]
sections:
  - Name:            .rdata
    Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ]
    Alignment:       1
    SectionData:     ''
symbols:
  - Name:            Function
    Value:           0
    SectionNumber:   0
    SimpleType:      IMAGE_SYM_TYPE_NULL
    ComplexType:     IMAGE_SYM_DTYPE_NULL
    StorageClass:    IMAGE_SYM_CLASS_WEAK_EXTERNAL
    WeakExternal:
      TagIndex:        9
      Characteristics: IMAGE_WEAK_EXTERN_SEARCH_LIBRARY
  - Name:            .weak.Function.default
    Value:           0
    SectionNumber:   -1
    SimpleType:      IMAGE_SYM_TYPE_NULL
    ComplexType:     IMAGE_SYM_DTYPE_NULL
    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
...