_nfc.so: undefined symbol: iso14443b_crc

[elonen]

Trying to build nfc-bindings on a Raspberry Pi (Raspbian Wheezy party upgraded to Jessie), on Python3.4 under venv, I get undefined symbol: iso14443b_crc when importing the module.

~/nfc $ git clone https://github.com/xantares/nfc-bindings.git
Cloning into 'nfc-bindings'...
remote: Counting objects: 311, done.
remote: Total 311 (delta 0), reused 0 (delta 0), pack-reused 311
Receiving objects: 100% (311/311), 49.22 KiB | 0 bytes/s, done.
Resolving deltas: 100% (177/177), done.
Checking connectivity... done.
~/nfc $ cd nfc-bindings
~/nfc/nfc-bindings $ cmake -DCMAKE_INSTALL_PREFIX=$PWD/../.env/
-- The C compiler identification is GNU 4.9.2
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.26") 
-- checking for module 'libnfc'
--   found libnfc, version 1.7.1
-- Found LibNFC: /usr/lib/arm-linux-gnueabihf/libnfc.so (found suitable version "1.7.1", minimum required is "1.7.1") 
-- Found SWIG: /usr/bin/swig2.0 (found version "2.0.12") 
-- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython3.4m.so (found version "3.4.2") 
-- Found PythonInterp: /home/pi/nfc/.env/bin/python (found version "3.4.2") 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/pi/nfc/nfc-bindings
~/nfc/nfc-bindings $ make install
[ 50%] Swig source
Scanning dependencies of target _nfc
[100%] Building C object python/CMakeFiles/_nfc.dir/nfcPYTHON_wrap.c.o
/home/pi/nfc/nfc-bindings/python/nfcPYTHON_wrap.c: In function ‘_wrap_device_get_supported_modulation’:
/home/pi/nfc/nfc-bindings/python/nfcPYTHON_wrap.c:4460:63: warning: passing argument 3 of ‘nfc_device_get_supported_modulation’ from incompatible pointer type
   result = (int)nfc_device_get_supported_modulation(arg1,arg2,(enum nfc_modulation_type const **)arg3);
                                                               ^
In file included from /home/pi/nfc/nfc-bindings/python/nfcPYTHON_wrap.c:3266:0:
/usr/include/nfc/nfc.h:128:16: note: expected ‘const enum nfc_modulation_type ** const’ but argument is of type ‘const enum nfc_modulation_type **’
 NFC_EXPORT int nfc_device_get_supported_modulation(nfc_device *pnd, const nfc_mode mode,  const nfc_modulation_type **const supported_mt);
                ^
/home/pi/nfc/nfc-bindings/python/nfcPYTHON_wrap.c: In function ‘_wrap_device_get_supported_baud_rate’:
/home/pi/nfc/nfc-bindings/python/nfcPYTHON_wrap.c:4500:62: warning: passing argument 3 of ‘nfc_device_get_supported_baud_rate’ from incompatible pointer type
   result = (int)nfc_device_get_supported_baud_rate(arg1,arg2,(enum nfc_baud_rate const **)arg3);
                                                              ^
In file included from /home/pi/nfc/nfc-bindings/python/nfcPYTHON_wrap.c:3266:0:
/usr/include/nfc/nfc.h:129:16: note: expected ‘const enum nfc_baud_rate ** const’ but argument is of type ‘const enum nfc_baud_rate **’
 NFC_EXPORT int nfc_device_get_supported_baud_rate(nfc_device *pnd, const nfc_modulation_type nmt, const nfc_baud_rate **const supported_br);
                ^
Linking C shared module _nfc.so
[100%] Built target _nfc
Install the project...
-- Install configuration: ""
-- Installing: /home/pi/nfc/.env/lib/python3.4/site-packages/nfc.py
-- Installing: /home/pi/nfc/.env/lib/python3.4/site-packages/_nfc.so
-- Removed runtime path from "/home/pi/nfc/.env/lib/python3.4/site-packages/_nfc.so"
-- Installing: /home/pi/nfc/.env/share/nfc-bindings/examples/nfc-anticol.py
-- Installing: /home/pi/nfc/.env/share/nfc-bindings/examples/nfc-dep-target.py
-- Installing: /home/pi/nfc/.env/share/nfc-bindings/examples/nfc-list.py
-- Installing: /home/pi/nfc/.env/share/nfc-bindings/examples/quick_start_example.py
~/nfc/nfc-bindings $ python
Python 3.4.2 (default, Oct 19 2014, 13:31:11) 
[GCC 4.9.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import nfc
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/pi/nfc/.env/lib/python3.4/site-packages/nfc.py", line 32, in <module>
    _nfc = swig_import_helper()
  File "/home/pi/nfc/.env/lib/python3.4/site-packages/nfc.py", line 28, in swig_import_helper
    _mod = imp.load_module('_nfc', fp, pathname, description)
  File "/usr/lib/python3.4/imp.py", line 243, in load_module
    return load_dynamic(name, filename, file)
ImportError: /home/pi/nfc/.env/lib/python3.4/site-packages/_nfc.so: undefined symbol: iso14443b_crc
>>> 

Apparently the libnfc header file contains iso14443b_crc(), but libnfc.so.5 doesn't:

~/nfc/nfc-bindings $ objdump -tT /usr/lib/arm-linux-gnueabihf/libnfc.so.5 | grep iso1444
0000378c g    DF .text  00000050  Base        iso14443a_locate_historical_bytes
00003730 g    DF .text  00000008  Base        iso14443a_crc_append
000036e8 g    DF .text  00000048  Base        iso14443a_crc

~/nfc/nfc-bindings $ grep iso1444 /usr/include/nfc/nfc.h 
NFC_EXPORT void iso14443a_crc(uint8_t *pbtData, size_t szLen, uint8_t *pbtCrc);
NFC_EXPORT void iso14443a_crc_append(uint8_t *pbtData, size_t szLen);
NFC_EXPORT void iso14443b_crc(uint8_t *pbtData, size_t szLen, uint8_t *pbtCrc);
NFC_EXPORT void iso14443b_crc_append(uint8_t *pbtData, size_t szLen);
NFC_EXPORT uint8_t *iso14443a_locate_historical_bytes(uint8_t *pbtAts, size_t szAts, size_t *pszTk);

Should I report this to libnfc's Debian packager or is this an issue with nfc-binding?

[xantares]

Hi,

Definetely an issue from your side, with vanilla libnfc 1.7.1 from archlinux I get these:

$ objdump -tT /usr/lib/libnfc.so|grep iso1444
000000000000aa30 g    DF .text  0000000000000054  Base        iso14443b_crc
000000000000aa20 g    DF .text  0000000000000009  Base        iso14443a_crc_append
000000000000aaa0 g    DF .text  000000000000004a  Base        iso14443a_locate_historical_bytes
000000000000c6c0 g    DF .text  0000000000000038  Base        snprint_nfc_iso14443b2sr_info
000000000000c570 g    DF .text  0000000000000142  Base        snprint_nfc_iso14443bi_info
000000000001dd70 g    DO .rodata        0000000000000008  Base        pn53x_iso14443a_supported_baud_rates
000000000000a9c0 g    DF .text  0000000000000053  Base        iso14443a_crc
000000000001dd20 g    DO .rodata        0000000000000014  Base        pn533_iso14443b_supported_baud_rates
000000000000aa90 g    DF .text  0000000000000009  Base        iso14443b_crc_append
000000000000aaf0 g    DF .text  00000000000000a3  Base        iso14443_cascade_uid
000000000001dd38 g    DO .rodata        0000000000000008  Base        pn532_iso14443b_supported_baud_rates
000000000000c090 g    DF .text  00000000000004d7  Base        snprint_nfc_iso14443b_info
000000000000c700 g    DF .text  00000000000000d0  Base        snprint_nfc_iso14443b2ct_info
000000000000acc0 g    DF .text  0000000000001261  Base        snprint_nfc_iso14443a_info

Are you sure it's v1.7.1 ? I remember a related issue being fixed between 1.7.0 and 1.7.1.

[elonen]

It is 1.7.1, and the function seems to be in the .c files. Packaging must be broken somehow.

[xantares]

@elonen I guess packaging used autotools : https://github.com/nfc-tools/libnfc/commit/68094b4f6d9d9f68ded22ca8fd1ace56e6751885

[elonen]

Yes! Nfc-bindings now compiles and works after that update.

[d0d0]

Hi, I am getting the same error. I am using raspberry pi, python 2.7.

First I was following these steps http://nfc-tools.org/index.php?title=Libnfc#Debian_.2F_Ubuntu. Everything works fine, when I run sudo nfc-poll my touchago read card.

Then I followed steps from this library, but I get the same result as above.

Do you have any solution or suggestions?

[xantares]

@D0d0, As you're using git you can simply backport that commit:

...
git checkout libnfc-1.7.1
git cherry-pick  68094b4
...

Then rebuild/reinstall etc

[xantares]

@D0d0, nfc-bindings now handles both cases cc @elonen

[d0d0]

Well, now it builds, but new error shows

pi@raspberrypi:~/Desktop/nfc-bindings $ cmake -DCMAKE_INSTALL_PREFIX=~/.local .
-- The C compiler identification is GNU 4.9.2
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.28") 
-- checking for module 'libnfc'
--   found libnfc, version 1.7.1
-- Found LibNFC: /usr/local/lib/libnfc.so (found suitable version "1.7.1", minimum required is "1.7.1") 
-- Looking for iso14443b_crc
-- Looking for iso14443b_crc - found
-- Found SWIG: /usr/local/bin/swig (found version "3.0.10") 
-- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython3.4m.so (found version "3.4.2") 
-- Found PythonInterp: /usr/bin/python (found version "2.7.9") 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/pi/Desktop/nfc-bindings
pi@raspberrypi:~/Desktop/nfc-bindings $ sudo make install
[ 50%] Swig source
Scanning dependencies of target _nfc
[100%] Building C object python/CMakeFiles/_nfc.dir/nfcPYTHON_wrap.c.o
/home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c: In function ‘_wrap_device_get_supported_modulation’:
/home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c:4584:63: warning: passing argument 3 of ‘nfc_device_get_supported_modulation’ from incompatible pointer type
   result = (int)nfc_device_get_supported_modulation(arg1,arg2,(enum nfc_modulation_type const **)arg3);
                                                               ^
In file included from /home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c:3390:0:
/usr/local/include/nfc/nfc.h:126:16: note: expected ‘const enum nfc_modulation_type ** const’ but argument is of type ‘const enum nfc_modulation_type **’
 NFC_EXPORT int nfc_device_get_supported_modulation(nfc_device *pnd, const nfc_mode mode,  const nfc_modulation_type **const supported_mt);
                ^
/home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c: In function ‘_wrap_device_get_supported_baud_rate’:
/home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c:4624:62: warning: passing argument 3 of ‘nfc_device_get_supported_baud_rate’ from incompatible pointer type
   result = (int)nfc_device_get_supported_baud_rate(arg1,arg2,(enum nfc_baud_rate const **)arg3);
                                                              ^
In file included from /home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c:3390:0:
/usr/local/include/nfc/nfc.h:127:16: note: expected ‘const enum nfc_baud_rate ** const’ but argument is of type ‘const enum nfc_baud_rate **’
 NFC_EXPORT int nfc_device_get_supported_baud_rate(nfc_device *pnd, const nfc_modulation_type nmt, const nfc_baud_rate **const supported_br);
                ^
/home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c: In function ‘_wrap_device_get_supported_baud_rate_target_mode’:
/home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c:8144:74: warning: passing argument 3 of ‘nfc_device_get_supported_baud_rate_target_mode’ from incompatible pointer type
   result = (int)nfc_device_get_supported_baud_rate_target_mode(arg1,arg2,(enum nfc_baud_rate const **)arg3);
                                                                          ^
In file included from /home/pi/Desktop/nfc-bindings/python/nfcPYTHON_wrap.c:3390:0:
/usr/local/include/nfc/nfc.h:128:16: note: expected ‘const enum nfc_baud_rate ** const’ but argument is of type ‘const enum nfc_baud_rate **’
 NFC_EXPORT int nfc_device_get_supported_baud_rate_target_mode(nfc_device *pnd, const nfc_modulation_type nmt, const nfc_baud_rate **const supported_br);
                ^
Linking C shared module _nfc.so
[100%] Built target _nfc
Install the project...
-- Install configuration: ""
-- Installing: /home/pi/.local/lib/python2.7/site-packages/nfc.py
-- Installing: /home/pi/.local/lib/python2.7/site-packages/_nfc.so
-- Removed runtime path from "/home/pi/.local/lib/python2.7/site-packages/_nfc.so"
-- Installing: /home/pi/.local/share/nfc-bindings/examples/nfc-anticol.py
-- Installing: /home/pi/.local/share/nfc-bindings/examples/nfc-dep-target.py
-- Installing: /home/pi/.local/share/nfc-bindings/examples/nfc-list.py
-- Installing: /home/pi/.local/share/nfc-bindings/examples/quick_start_example.py

[xantares]

@D0d0, these are only warnings

[xantares]

@D0d0 no need for sudo when installing into ~

[d0d0]

Of course these are just warnings (i got them before your commit), but when running next script i get this output. Error is referencing to one function from warning

pi@raspberrypi:~/Desktop $ python quick_start_example.py 
Traceback (most recent call last):
  File "quick_start_example.py", line 7, in <module>
    import nfc
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 20, in <module>
    _nfc = swig_import_helper()
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 19, in swig_import_helper
    return importlib.import_module(mname)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
ImportError: /home/pi/.local/lib/python2.7/site-packages/_nfc.so: undefined symbol: nfc_device_get_supported_baud_rate_target_mode

[xantares]

@D0d0 So you followed http://nfc-tools.org/index.php?title=Libnfc#Debian_.2F_Ubuntu ? So which version of libnfc did you install, the tag or the HEAD ? Using autotools, cmake or the debian package ?

[d0d0]

@xantares Yes, I followed the steps in the mentioned page. One command is git checkout libnfc-1.7.1 so I believe version is 1.7.1. Also when I installed your lib I got this

-- checking for module 'libnfc'
--   found libnfc, version 1.7.1
-- Found LibNFC: /usr/local/lib/libnfc.so (found suitable version "1.7.1", minimum required is "1.7.1") 

and when i run nfc-poll, i get nfc-poll uses libnfc libnfc-1.7.1

[xantares]

@D0d0 what's the result of: objdump -T /usr/local/lib/libnfc.so|grep nfc_device_get

[d0d0]

@xantares

pi@raspberrypi:~/Desktop/nfc-bindings $ objdump -T /usr/local/lib/libnfc.so|grep nfc_device_get
00004a70 g    DF .text  0000004c  Base        nfc_device_get_supported_baud_rate_target_mode
00004700 g    DF .text  00000048  Base        nfc_device_get_supported_baud_rate
000046c0 g    DF .text  00000008  Base        nfc_device_get_connstring
000046b0 g    DF .text  00000008  Base        nfc_device_get_last_error
000046c8 g    DF .text  00000038  Base        nfc_device_get_supported_modulation
000046b8 g    DF .text  00000008  Base        nfc_device_get_name
00004ad0 g    DF .text  00000030  Base        nfc_device_get_information_about

[xantares]

@D0d0, the symbol is there, do you have another libnfc.so installed ? maybe in /usr/lib ?

[xantares]

can you do: ldd /home/pi/.local/lib/python2.7/site-packages/_nfc.so

[d0d0]

pi@raspberrypi:~/Desktop $ ldd /home/pi/.local/lib/python2.7/site-packages/_nfc.so
    linux-vdso.so.1 (0x76f55000)
    /usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76f03000)
    libnfc.so.5 => /usr/lib/arm-linux-gnueabihf/libnfc.so.5 (0x76ec1000)
    libusb-0.1.so.4 => /lib/arm-linux-gnueabihf/libusb-0.1.so.4 (0x76ea9000)
    libpython3.4m.so.1.0 => /usr/lib/arm-linux-gnueabihf/libpython3.4m.so.1.0 (0x76aee000)
    libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x769ad000)
    /lib/ld-linux-armhf.so.3 (0x54ad4000)
    librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0x76996000)
    libexpat.so.1 => /lib/arm-linux-gnueabihf/libexpat.so.1 (0x76963000)
    libz.so.1 => /lib/arm-linux-gnueabihf/libz.so.1 (0x7693c000)
    libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0x76914000)
    libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x76901000)
    libutil.so.1 => /lib/arm-linux-gnueabihf/libutil.so.1 (0x768ee000)
    libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0x76872000)
    libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x76845000)

[xantares]

@D0d0 ls -l /usr/local/lib/libnfc.so objdump -T /usr/lib/arm-linux-gnueabihf/libnfc.so.5|grep nfc_device_get

[d0d0]

@xantares

pi@raspberrypi:~/Desktop $ ls -l /usr/local/lib/libnfc.so
lrwxrwxrwx 1 root staff 15 May 31 18:10 /usr/local/lib/libnfc.so -> libnfc.so.5.0.1
pi@raspberrypi:~/Desktop $ objdump -T /usr/lib/arm-linux-gnueabihf/libnfc.so.5|grep nfc_device_get
00004ad4 g    DF .text  00000038  Base        nfc_device_get_supported_baud_rate
00004a94 g    DF .text  00000008  Base        nfc_device_get_connstring
00004a84 g    DF .text  00000008  Base        nfc_device_get_last_error
00004a9c g    DF .text  00000038  Base        nfc_device_get_supported_modulation
00004a8c g    DF .text  00000008  Base        nfc_device_get_name
00004b20 g    DF .text  00000030  Base        nfc_device_get_information_about
pi@raspberrypi:~/Desktop $ python quick_start_example.py 
Traceback (most recent call last):
  File "quick_start_example.py", line 7, in <module>
    import nfc
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 20, in <module>
    _nfc = swig_import_helper()
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 19, in swig_import_helper
    return importlib.import_module(mname)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
ImportError: /home/pi/.local/lib/python2.7/site-packages/_nfc.so: undefined symbol: nfc_device_get_supported_baud_rate_target_mode

and then i tried reinstall your lib with the same result

[xantares]

ls -l /usr/lib/arm-linux-gnueabihf/libnfc.so.5 ?

[d0d0]

pi@raspberrypi:~/Desktop $ ls -l /usr/lib/arm-linux-gnueabihf/libnfc.so.5
lrwxrwxrwx 1 root root 15 May 31 18:15 /usr/lib/arm-linux-gnueabihf/libnfc.so.5 -> libnfc.so.5.0.1

[xantares]

@D0d0 you've definetely got two versions installed one in /usr/lib/arm-linux-gnueabihf/, the other in /usr/local try to rename this one: sudo mv /usr/lib/arm-linux-gnueabihf/libnfc.so.5 /usr/lib/arm-linux-gnueabihf/libnfc.so.5zzzz

[d0d0]

pi@raspberrypi:~/Desktop $ python quick_start_example.py 
Traceback (most recent call last):
  File "quick_start_example.py", line 7, in <module>
    import nfc
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 20, in <module>
    _nfc = swig_import_helper()
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 19, in swig_import_helper
    return importlib.import_module(mname)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
ImportError: libnfc.so.5: cannot open shared object file: No such file or directory

and also tried reinstall your package with the same result. I tried cp one from /usr/local to /usr/lib with this result

pi@raspberrypi:~/Desktop $ sudo cp /usr/local/lib/libnfc.so /usr/lib/arm-linux-gnueabihf/libnfc.so.5
pi@raspberrypi:~/Desktop $ python quick_start_example.py 
Traceback (most recent call last):
  File "quick_start_example.py", line 7, in <module>
    import nfc
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 20, in <module>
    _nfc = swig_import_helper()
  File "/home/pi/.local/lib/python2.7/site-packages/nfc.py", line 19, in swig_import_helper
    return importlib.import_module(mname)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
ImportError: dynamic module does not define init function (init_nfc)

[xantares]

@D0d0 that's progress, the bug now is that you link against py3 libs but use the py2 interpreter: -- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython3.4m.so -- Found PythonInterp: /usr/bin/python (found version "2.7.9")

[d0d0]

@xantares yes, I saw it first time i built lib, but did not know how to change interpreter or libs (for me it does not matter if it is py2 or py3)

[xantares]

@D0d0 pass -DPYTHON_EXECUTABLE=/usr/bin/python3 to cmake and use python3 to execute

[d0d0]

@xantares i own you a lot beer! thank you for your patience!

Also it would be great to add python3 build into docs.

pi@raspberrypi:~/Desktop $ sudo cp /usr/local/lib/libnfc.so /usr/lib/arm-linux-gnueabihf/libnfc.so.5
pi@raspberrypi:~/Desktop $ python3 quick_start_example.py 
Version:  libnfc-1.7.1-89-g403650a
NFC reader:     / CCID USB Reader opened
The following (NFC) ISO14443A tag was found:
    ATQA (SENS_RES): 00  44  
       UID (NFCID1): 04  76  32  d9  a1  25  80  
      SAK (SEL_RES): 0

[xantares]

@D0d0 great success!