xcode architecture x86_64问题

Question

Undefined symbols for architecture x86_64:
"_crc32", referenced from:
-[ZipArchive addFileToZip:newname:] in ZipArchive.o
zipWriteInFileInZip in zip.o
_unzReadCurrentFile in unzip.o
"_deflate", referenced from:
_zipWriteInFileInZip in zip.o
_zipCloseFileInZipRaw in zip.o
"_deflateEnd", referenced from:
_zipCloseFileInZipRaw in zip.o
"_deflateInit2", referenced from:
zipOpenNewFileInZip3 in zip.o
"_get_crc_table", referenced from:
_zipOpenNewFileInZip3 in zip.o
_unzOpenCurrentFile3 in unzip.o
"_inflate", referenced from:
_unzReadCurrentFile in unzip.o
"_inflateEnd", referenced from:
_unzCloseCurrentFile in unzip.o
"_inflateInit2", referenced from:
_unzOpenCurrentFile3 in unzip.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

http://www.xcoder.cn/index.php/archives/272