Undefined symbols for architecture arm64 when archiving in Xcode

[Yong Duk Lee]

Hello.

I am using the cryptopp library from cryptopp-5.6.2-ios-7.0 in Xcode 5.0.

Everything works fine, and I can run my program either in simulator or device.

However, when I try to archive the program in xcode to build ad-hoc app, it 

says "Undefined symbols for architecture arm64".

The library was said to be built for arm7, arm7s, arm64, i386. 

What could be wrong? Can anyone help? 

Thank you.

[Jeffrey Walton]

On Sunday, October 13, 2013 2:59:53 AM UTC-4, Yong Duk Lee wrote:

Hello.

I am using the cryptopp library from cryptopp-5.6.2-ios-7.0 in Xcode 5.0.

Everything works fine, and I can run my program either in simulator or device.

However, when I try to archive the program in xcode to build ad-hoc app, it 

says "Undefined symbols for architecture arm64".

The library was said to be built for arm7, arm7s, arm64, i386.

It is. You can use `lipo` to verify:
 
    $ xcrun -sdk iphoneos lipo -info libcryptopp.a
    Architectures in the fat file: libcryptopp.a are: armv7 armv7s arm64 i386

What could be wrong? Can anyone help?

I believe this as an Apple problem that is supposed to be fixed soon. The problem is `lipo` can build fat binaries that mix 32-bit and 64-bit code (e.g., libcrpytopp), but Xcode cannot at the moment (e.g., your app with 32-bit ARMv7, 32-bit ARMv7s and 64-bit ARM64). See "ARM64 and -mios-version-min=7.0?", http://lists.apple.com/archives/xcode-users/2013/Oct/msg00074.html.

Jeff

[Wasin Thonkaew]

Hi Yong,

I got stuck on these two linking errors. I post the whole message as follows.

Undefined symbols for architecture i386:
  "_clock$UNIX2003", referenced from:
      CryptoPP::X917RNG::X917RNG(CryptoPP::BlockTransformation*, unsigned char const*, unsigned char const*) in libcryptopp-osx.a(rng.o)
      CryptoPP::X917RNG::GenerateIntoBufferedTransformation(CryptoPP::BufferedTransformation&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long long) in libcryptopp-osx.a(rng.o)
  "_sleep$UNIX2003", referenced from:
      CryptoPP::BlockingRng::GenerateBlock(unsigned char*, unsigned long) in libcryptopp-osx.a(osrng.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I've built cryptopp as a dynamic library (.a) separately for iOS device, and simulator.

I can successfully build the project with cryptopp and run on iOS device, but not for simulator in which it shows the error above.

Do I miss anything?

Wasin

[Wasin Thonkaew]

Hi Yong,

After spent a night with it, I finally use the pre-build available at https://github.com/noloader/cryptopp-5.6.2-ios.

It contains fat binary for arm7 arm7s arm64 and i386. This ways solves me a problem that I once have to separate building a project into 2 targets (device, and simulator).

Thanks

Wasin

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