Linking error coming when linking libcryptopp.a

[Rajiv Poplai]

I created libcrypto.a of CCryptopp 5.6.1 on Mac OS 10.9 using GNUmakefile.

Subsequently when I link it in my project in XCode 5.1.1, I get the following linker error.

CryptoPP:RandomPool::GenerateIntoBufferedTransformation symbol not found.

Can anybody help me with this issue.

thanks,

rajiv

[Jeffrey Walton]

Xcode uses LLVM's libc++ by default. By default, Crpyto++'s GNUmakefile omits CXXFLAGS += -std=libc++, so it uses GNU's libstdc++. The following is from around line 90:

ifeq ($(UNAME),Darwin)
  AR = libtool
  ARFLAGS = -static -o
  CXX = c++
  IS_GCC2 = $(shell $(CXX) -v 2>&1 | $(EGREP) -c gcc-932)
  ifeq ($(IS_GCC2),1)
    CXXFLAGS += -fno-coalesce-templates -fno-coalesce-static-vtables
    LDLIBS += -lstdc++
    LDFLAGS += -flat_namespace -undefined suppress -m
  endif
endif

So you will either need to:

  (1) Change Xcode to use GNU's libstdc++

  (2) Rebuild Crypto++ to use LLVM's libc++

To perform (1), change the setting in the Target's build settings.

To perform (2), open the GNUmakefile and add CXXFLAGS += -std=libc++ after one of he Darwin tests (search for Darwin). And get rid of the line:

    LDLIBS += -lstdc++

Jeff

[Rajiv Poplai]

Thanks Jeff, I followed the steps detailed but it is showing one symbol as not found.

CryptoPP::RandomPool::GenerateIntoBufferedTransformation(CryptoPP::BufferedTransformation &, std::string const&, unsigned long long)

referenced from Vtable for CryptoPP::AutoSeededRandomPool 

This is caused by following statement in code

CryptoPP::AutoSeededRandomPool  rnd;

In the randpool.cpp GenerateIntoBufferedTransformation has the last parameter defined as lword and not unsigned long long. 

Not able to figure out how to rectify this problem.

regards,

rajiv

[Jeffrey Walton]

On Thursday, February 19, 2015 at 8:11:34 AM UTC-5, Rajiv Poplai wrote:

Thanks Jeff, I followed the steps detailed but it is showing one symbol as not found.

CryptoPP::RandomPool::GenerateIntoBufferedTransformation(CryptoPP::BufferedTransformation &, std::string const&, unsigned long long)

referenced from Vtable for CryptoPP::AutoSeededRandomPool 

This is caused by following statement in code

CryptoPP::AutoSeededRandomPool  rnd;

In the randpool.cpp GenerateIntoBufferedTransformation has the last parameter defined as lword and not unsigned long long. 

Not able to figure out how to rectify this problem

This is just a typedef from config.h:

    #if defined(_MSC_VER) || defined(__BORLANDC__)
      typedef unsigned __int64 word64;
      #define W64LIT(x) x##ui64
    #else
      typedef unsigned long long word64;
      #define W64LIT(x) x##ULL
    #endif

    // define large word type, used for file offsets and such
    typedef word64 lword;
    const lword LWORD_MAX = W64LIT(0xffffffffffffffff);

Please provide the Xcode setting you are using under C++ Standard Library (CLANG_CXX_LIBRARY).

Please provide the output of of lipo. It should look something like this:

    $ xcrun -sdk iphoneos lipo -info /usr/local/lib/libcryptopp.a
    Non-fat file:/usr/local/lib/libcryptopp.a is architecture: x86_64 i386

Please provide the output of the following command:

    nm -g /usr/local/lib/libcryptopp.a | c++filt | grep RandomPool::GenerateIntoBufferedTransformation | grep " T "

Please provide the link command you are using (produced by Xcode).

Jeff

[Rajiv Poplai]

On Friday, February 20, 2015 at 2:08:42 AM UTC+5:30, Jeffrey Walton wrote:

On Thursday, February 19, 2015 at 8:11:34 AM UTC-5, Rajiv Poplai wrote:

Thanks Jeff, I followed the steps detailed but it is showing one symbol as not found.

CryptoPP::RandomPool::GenerateIntoBufferedTransformation(CryptoPP::BufferedTransformation &, std::string const&, unsigned long long)

referenced from Vtable for CryptoPP::AutoSeededRandomPool 

This is caused by following statement in code

CryptoPP::AutoSeededRandomPool  rnd;

In the randpool.cpp GenerateIntoBufferedTransformation has the last parameter defined as lword and not unsigned long long. 

Not able to figure out how to rectify this problem

This is just a typedef from config.h:

    #if defined(_MSC_VER) || defined(__BORLANDC__)
      typedef unsigned __int64 word64;
      #define W64LIT(x) x##ui64
    #else
      typedef unsigned long long word64;
      #define W64LIT(x) x##ULL
    #endif

    // define large word type, used for file offsets and such
    typedef word64 lword;
    const lword LWORD_MAX = W64LIT(0xffffffffffffffff);

Please provide the Xcode setting you are using under C++ Standard Library (CLANG_CXX_LIBRARY).

libstdc++ 

[~/Documents/ccryptopp]$ lipo -info libcryptopp.a 

input file libcryptopp.a is not a fat file

Non-fat file: libcryptopp.a is architecture: x86_64

 

Please provide the output of the following command:

    nm -g /usr/local/lib/libcryptopp.a | c++filt | grep RandomPool::GenerateIntoBufferedTransformation | grep " T "

 0000000000000310 T CryptoPP::RandomPool::GenerateIntoBufferedTransformation(CryptoPP::BufferedTransformation&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long long)

0000000000002d78 S CryptoPP::RandomPool::GenerateIntoBufferedTransformation(CryptoPP::BufferedTransformation&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long long) (.eh)

Please provide the link command you are using (produced by Xcode).

Ld /Users/rapoplai/git/gocartclient/public/gcclient/libraries/macintosh/universal/debug/GCClient.app/Contents/MacOS/GCClient normal x86_64

    cd /Users/rapoplai/git/gocartclient/build/gcclient/xcode

    export MACOSX_DEPLOYMENT_TARGET=10.7

    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -L/Users/rapoplai/git/gocartclient/public/gcclient/libraries/macintosh/universal/debug -L/Users/rapoplai/git/gocartclient/build/gcclient/xcode/../../../public/services/libraries/macintosh/universal/debug -L/Users/rapoplai/git/gocart/sources/client/public/services/libraries/macintosh/universal/Debug -L/Users/rapoplai/git/gocart/sources/client/public/services/libraries/macintosh/universal/Release -L/Users/rapoplai/git/gocartclient/external/caps/libraries/macintosh/universal/debug -L/Users/rapoplai/git/gocartclient/build/adobe_ialclient/xcode/../../../external/CCryptoPP/5.6.2/lib/mac/10.9 -L/Users/rapoplai/git/gocartclient/external/CCryptoPP/5.6.2/lib/mac/10.9 -L/Users/rapoplai/git/gocartclient/build/adobe_ialclient/xcode -F/Users/rapoplai/git/gocartclient/public/gcclient/libraries/macintosh/universal/debug -filelist /Users/rapoplai/git/gocartclient/obj/gcclient.build/debug/GCClient.build/Objects-normal/x86_64/GCClient.LinkFileList -mmacosx-version-min=10.7 -no_dead_strip_inits_and_terms -Wl -pie -stdlib=libstdc++ -fobjc-link-runtime -lcrypto /Users/rapoplai/git/gocartclient/public/adobe_ialclient/libraries/macintosh/universal/debug/adobe_ialclient.a /Users/rapoplai/git/gocartclient/public/DispatchClient/libraries/macintosh/universal/debug/libdispatchclient.a -lribscaps -lcryptopp /Users/rapoplai/git/gocartclient/public/services/libraries/macintosh/universal/debug/libAMTServiceLoader.a -lsqlite3 -lc++.1 -framework SystemConfiguration -framework Cocoa -Xlinker -dependency_info -Xlinker /Users/rapoplai/git/gocartclient/obj/gcclient.build/debug/GCClient.build/Objects-normal/x86_64/GCClient_dependency_info.dat -o /Users/rapoplai/git/gocartclient/public/gcclient/libraries/macintosh/universal/debug/GCClient.app/Contents/MacOS/GCClient

[Jeffrey Walton]

>> Please provide the Xcode setting you are using under C++ Standard Library (CLANG_CXX_LIBRARY).

> libstdc++ 

>>     nm -g /usr/local/lib/libcryptopp.a | c++filt | grep RandomPool::GenerateIntoBufferedTransformation | grep " T "

> 0000000000000310 T CryptoPP::RandomPool::GenerateIntoBufferedTransformation(CryptoPP::BufferedTransformation&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long long)

There's your problem :(

Xcode is using GNU's libstdc++. Your libcryptoppa. is using LLVM's libc++.

You can tell because LLVM decorates their symbols with the "__1". I don't know anything else about it  "__1". It may be an actual namespace, or it may be a pseudo-namespace.

Jeff

[Rajiv Poplai]

Thanks Jeff, that indeed solved the problem.

regards,

Rajiv

[Manish Gautam]

Hi Rajiv,

I have a similar problem. Can you please tell me how your problem get solved?
I need it urgently. Thanks in advance.

[Manish Gautam]

Hi Rajiv and Jeff,

I have come across a similar issue.

Can you guys please help me with this?
I am getting following error:

Undefined symbols for architecture i386:

  "CryptoPP::HashFilter::HashFilter(CryptoPP::HashTransformation&, CryptoPP::BufferedTransformation*, bool, int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:

Please respond Sir.

[Jeffrey Walton]

See https://stackoverflow.com/questions/39011387/compile-crypto-library-for-os-x.

Jeff