iOS离线包更新SDK报错

ld: warning: could not create compact unwind for _ffi_call_unix64: does not use RBP or RSP based frame
Undefined symbols for architecture x86_64:
"_uchardet_new", referenced from:
+[ZXStringUtils uchardetGuessEncoding:hints:autoDecodeCharset:charset:] in libDCUniZXing.a(ZXStringUtils.o)
"_uchardet_handle_data", referenced from:
+[ZXStringUtils uchardetGuessEncoding:hints:autoDecodeCharset:charset:] in libDCUniZXing.a(ZXStringUtils.o)
"_uchardet_data_end", referenced from:
+[ZXStringUtils uchardetGuessEncoding:hints:autoDecodeCharset:charset:] in libDCUniZXing.a(ZXStringUtils.o)
"_uchardet_get_charset", referenced from:
+[ZXStringUtils uchardetGuessEncoding:hints:autoDecodeCharset:charset:] in libDCUniZXing.a(ZXStringUtils.o)
"_uchardet_delete", referenced from:
+[ZXStringUtils uchardetGuessEncoding:hints:autoDecodeCharset:charset:] in libDCUniZXing.a(ZXStringUtils.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Undefined symbol: _uchardet_new
Undefined symbol: _uchardet_handle_data
Undefined symbol: _uchardet_data_end
Undefined symbol: _uchardet_get_charset
Undefined symbol: _uchardet_delete

更新3.8.1版本后报错，请问知道是什么原因吗？