Official address of CRF + +: https://taku910.github.io/crfpp/
- Find the download. It's all on google cloud disk at present.
Download the latest version, now 0.58 - Download the source package, CRF++-0.58.tar.gz
- Put it on the linux server
Run command
./configure
Output result
checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /usr/bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking dependency style of g++... gcc3 checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking whether gcc needs -traditional... no checking whether make sets $(MAKE)... (cached) yes checking for library containing strerror... none required checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking how to print strings... printf checking for a sed that does not truncate output... /usr/bin/sed checking for fgrep... /usr/bin/grep -F checking for ld used by gcc... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister (/usr/bin/nm -B) interface... BSD nm checking whether ln -s works... yes checking the maximum length of command line arguments... 1572864 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking how to convert x86_64-unknown-linux-gnu file names to x86_64-unknown-linux-gnu format... func_convert_file_noop checking how to convert x86_64-unknown-linux-gnu file names to toolchain format... func_convert_file_noop checking for /usr/bin/ld option to reload object files... -r checking for objdump... objdump checking how to recognize dependent libraries... pass_all checking for dlltool... no checking how to associate runtime and link libraries... printf %s\n checking for ar... ar checking for archiver @FILE support... @ checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/bin/nm -B output from gcc object... ok checking for sysroot... no checking for mt... no checking if : is a manifest tool... no checking for ANSI C header files... no checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for dlfcn.h... yes checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... no checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... yes checking how to run the C++ preprocessor... g++ -E checking for ld used by g++... /usr/bin/ld -m elf_x86_64 checking if the linker (/usr/bin/ld -m elf_x86_64) is GNU ld... yes checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking for g++ option to produce PIC... -fPIC -DPIC checking if g++ PIC flag -fPIC -DPIC works... yes checking if g++ static flag -static works... no checking if g++ supports -c -o file.o... yes checking if g++ supports -c -o file.o... (cached) yes checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking dynamic linker characteristics... (cached) GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking for ANSI C header files... (cached) no checking for string.h... (cached) yes checking for stdlib.h... (cached) yes checking for unistd.h... (cached) yes checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking for sys/stat.h... (cached) yes checking sys/mman.h usability... yes checking sys/mman.h presence... yes checking for sys/mman.h... yes checking sys/times.h usability... yes checking sys/times.h presence... yes checking for sys/times.h... yes checking ctype.h usability... yes checking ctype.h presence... yes checking for ctype.h... yes checking for sys/types.h... (cached) yes checking math.h usability... yes checking math.h presence... yes checking for math.h... yes checking pthread.h usability... yes checking pthread.h presence... yes checking for pthread.h... yes checking for size_t... yes checking for pow in -lm... yes checking for exp in -lm... yes checking for log in -lm... yes checking for pthread_create in -lpthread... yes checking for pthread_join in -lpthread... yes checking for stdlib.h... (cached) yes checking for unistd.h... (cached) yes checking for sys/param.h... yes checking for getpagesize... yes checking for working mmap... yes checking whether make is GNU Make... yes checking if g++ supports stl <string> (required)... yes checking if g++ supports stl <vector> (required)... yes checking if g++ supports stl <map> (required)... yes checking if g++ supports stl <set> (required)... yes checking if g++ supports stl <iostream> (required)... yes checking if g++ supports stl <fstream> (required)... yes checking if g++ supports stl <sstream> (required)... yes checking if g++ supports stl <stdexcept> (required)... yes checking if g++ supports template <class T> (required)... yes checking if g++ supports const_cast<> (required)... yes checking if g++ supports static_cast<> (required)... yes checking if g++ supports dynamic_cast<> (required)... yes checking if g++ supports exception handler (required)... yes checking if g++ supports namespaces (required) ... yes checking if g++ supports __thread (optional)... yes checking if g++ supports _SC_NPROCESSORS_CONF (optional)... yes checking if g++ environment provides all required features... yes configure: creating ./config.status config.status: creating Makefile config.status: creating Makefile.msvc config.status: creating swig/version.h config.status: creating config.h config.status: executing depfiles commands config.status: executing libtool commands
It's really comfortable to see a series of yes.
Compile later
make sudo make install
Install Python dependency, enter the subdirectory python, cd python
python setup.py build python setup.py install
At this time, you may encounter problems when you call CRF? Train or import in python
libcrfpp.so.0: cannot open shared object file: No such file or directory
Go to python and try it
python Python 3.7.2 (default, Dec 29 2018, 06:19:36) [GCC 7.3.0] :: Anaconda, Inc. on linux Type "help", "copyright", "credits" or "license" for more information. >>> import CRFPP Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/xxx/.conda/envs/python37/lib/python3.7/site-packages/CRFPP.py", line 26, in <module> _CRFPP = swig_import_helper() File "/home/xxx/.conda/envs/python37/lib/python3.7/site-packages/CRFPP.py", line 22, in swig_import_helper _mod = imp.load_module('_CRFPP', fp, pathname, description) File "/home/xxx/.conda/envs/python37/lib/python3.7/imp.py", line 242, in load_module return load_dynamic(name, filename, file) File "/home/xxx/.conda/envs/python37/lib/python3.7/imp.py", line 342, in load_dynamic return _load(spec) ImportError: libcrfpp.so.0: cannot open shared object file: No such file or directory
It's a headache.
There's been a lot of experimentation here
Install libgcc
conda install libgcc
Find this file first
sudo find ./ | grep libcrfpp.so.0
Then copy to the required directory
cp ./.libs/libcrfpp.so.0 /usr/local/lib/
Building a soft chain
ln -s /usr/local/lib/libcrfpp.so.0 /usr/lib/
Clear cache
sudo rm -f /etc/ld.so.cache
Share dynamic link library
sudo ldconfig
Succeed
python Python 3.7.2 (default, Dec 29 2018, 06:19:36) [GCC 7.3.0] :: Anaconda, Inc. on linux Type "help", "copyright", "credits" or "license" for more information. >>> import CRFPP >>>