Question

Possible Duplicate:
error when import zlib in iOS: symbol(s) not found collect2: ld

I am working on iphone project and I need a library to extract ZIP file
I found ZipArchive but it doesn’t compatible with ARC and when I add -fno-objc-arc to compile files I get linker error:

Undefined symbols for architecture i386:
“_inflateEnd”, referenced from:
_unzCloseCurrentFile in unzip.o
“inflateInit2“, referenced from:
_unzOpenCurrentFile3 in unzip.o
“_get_crc_table”, referenced from:
_unzOpenCurrentFile3 in unzip.o
_zipOpenNewFileInZip3 in zip.o
“_crc32”, referenced from:
_unzReadCurrentFile in unzip.o
_zipWriteInFileInZip in zip.o
-[ZipArchive addFileToZip:newname:] in ZipArchive.o
“_inflate”, referenced from:
_unzReadCurrentFile in unzip.o
“deflateInit2“, referenced from:
_zipOpenNewFileInZip3 in zip.o
“_deflate”, referenced from:
_zipWriteInFileInZip in zip.o
_zipCloseFileInZipRaw in zip.o
“_deflateEnd”, referenced from:
_zipCloseFileInZipRaw in zip.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

For the undefined symbols, you need to add libz to the linked libraries. See: error when import zlib in iphone sdk