title: error while trying to install tesserocr
body: <p>I keep getting the same error when I try to install</p>
  
  <pre><code>(env) vagrant@vagrant:~$ pip install tesserocr
  Collecting tesserocr
    Using cached tesserocr-2.1.3.tar.gz
  Building wheels for collected packages: tesserocr
    Running setup.py bdist_wheel for tesserocr ... error
    Complete output from command /home/vagrant/src/env/bin/python2 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-4K2D6A/tesserocr/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmp5p5G1lpip-wheel- --python-tag cp27:
    running bdist_wheel
    running build
    running build_ext
    Failed to extract tesseract version from executable: [Errno 2] No such file or directory
    Supporting tesseract v3.04.00
    Building with configs: {'libraries': ['tesseract', 'lept'], 'cython_compile_time_env': {'TESSERACT_VERSION': 197632}}
    cythoning tesserocr.pyx to tesserocr.cpp
    building 'tesserocr' extension
    creating build
    creating build/temp.linux-x86_64-2.7
    x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c tesserocr.cpp -o build/temp.linux-x86_64-2.7/tesserocr.o
    cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
    tesserocr.cpp:446:34: fatal error: leptonica/allheaders.h: No such file or directory
    compilation terminated.
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  
    ----------------------------------------
    Failed building wheel for tesserocr
    Running setup.py clean for tesserocr
  Failed to build tesserocr
  Installing collected packages: tesserocr
    Running setup.py install for tesserocr ... error
      Complete output from command /home/vagrant/src/env/bin/python2 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-4K2D6A/tesserocr/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-mePzAW-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/vagrant/src/env/include/site/python2.7/tesserocr:
      running install
      running build
      running build_ext
      Failed to extract tesseract version from executable: [Errno 2] No such file or directory
      Supporting tesseract v3.04.00
      Building with configs: {'libraries': ['tesseract', 'lept'], 'cython_compile_time_env': {'TESSERACT_VERSION': 197632}}
      skipping 'tesserocr.cpp' Cython extension (up-to-date)
      building 'tesserocr' extension
      creating build
      creating build/temp.linux-x86_64-2.7
      x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c tesserocr.cpp -o build/temp.linux-x86_64-2.7/tesserocr.o
      cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
      tesserocr.cpp:446:34: fatal error: leptonica/allheaders.h: No such file or directory
      compilation terminated.
      error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  
      ----------------------------------------
  Command "/home/vagrant/src/env/bin/python2 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-4K2D6A/tesserocr/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-mePzAW-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/vagrant/src/env/include/site/python2.7/tesserocr" failed with error code 1 in /tmp/pip-build-4K2D6A/tesserocr/
  </code></pre>
  
  <p>Sachin System Error:</p>
  
  <pre><code>pip install tesserocr                                                                                     
  Collecting tesserocr
  /usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:318: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#snimissingwarning.
    SNIMissingWarning
  /usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
    InsecurePlatformWarning
    Using cached tesserocr-2.1.3.tar.gz
  Building wheels for collected packages: tesserocr
    Running setup.py bdist_wheel for tesserocr ... error
    Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-YcBV5a/tesserocr/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmpRrPD1Vpip-wheel- --python-tag cp27:
    running bdist_wheel
    running build
    running build_ext
    pkg-config failed to find tesseract/lep libraries: Package tesseract was not found in the pkg-config search path.
    Perhaps you should add the directory containing `tesseract.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'tesseract' found
  
    Supporting tesseract v3.03
    Building with configs: {'libraries': ['tesseract', 'lept'], 'cython_compile_time_env': {'TESSERACT_VERSION': 771}}
    cythoning tesserocr.pyx to tesserocr.cpp
    building 'tesserocr' extension
    creating build
    creating build/temp.linux-x86_64-2.7
    x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c tesserocr.cpp -o build/temp.linux-x86_64-2.7/tesserocr.o
    cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++ [enabled by default]
    tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_14PyPageIterator_20SetBoundingBoxComponents(__pyx_obj_9tesserocr_PyPageIterator*, bool, bool)’:
    tesserocr.cpp:4622:25: error: ‘class tesseract::PageIterator’ has no member named ‘SetBoundingBoxComponents’
       __pyx_v_self-&gt;_piter-&gt;SetBoundingBoxComponents(__pyx_v_include_upper_dots, __pyx_v_include_lower_dots);
                             ^
    tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_14PyPageIterator_34GetImage(__pyx_obj_9tesserocr_PyPageIterator*, tesseract::PageIteratorLevel, int, PyObject*)’:
    tesserocr.cpp:5854:125: error: no matching function for call to ‘tesseract::PageIterator::GetImage(tesseract::PageIteratorLevel&amp;, int&amp;, Pix*&amp;, int*, int*)’
       __pyx_v_pix = __pyx_v_self-&gt;_piter-&gt;GetImage(__pyx_v_level, __pyx_v_padding, __pyx_v_opix, (&amp;__pyx_v_left), (&amp;__pyx_v_top));
                                                                                                                                 ^
    tesserocr.cpp:5854:125: note: candidate is:
    In file included from tesserocr.cpp:456:0:
    /usr/include/tesseract/pageiterator.h:239:8: note: Pix* tesseract::PageIterator::GetImage(tesseract::PageIteratorLevel, int, int*, int*) const
       Pix* GetImage(PageIteratorLevel level, int padding,
            ^
    /usr/include/tesseract/pageiterator.h:239:8: note:   candidate expects 4 arguments, 5 provided
    tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_13PyTessBaseAPI_74AnalyseLayout(__pyx_obj_9tesserocr_PyTessBaseAPI*, bool)’:
    tesserocr.cpp:16256:83: error: no matching function for call to ‘tesseract::TessBaseAPI::AnalyseLayout(bool&amp;)’
       __pyx_v_piter = __pyx_v_self-&gt;_baseapi.AnalyseLayout(__pyx_v_merge_similar_words);
                                                                                       ^
    tesserocr.cpp:16256:83: note: candidate is:
    In file included from tesserocr.cpp:461:0:
    /usr/include/tesseract/baseapi.h:489:17: note: tesseract::PageIterator* tesseract::TessBaseAPI::AnalyseLayout()
       PageIterator* AnalyseLayout();
                     ^
    /usr/include/tesseract/baseapi.h:489:17: note:   candidate expects 0 arguments, 1 provided
    tesserocr.cpp: In function ‘tesseract::TessResultRenderer* __pyx_f_9tesserocr_13PyTessBaseAPI__get_renderer(__pyx_obj_9tesserocr_PyTessBaseAPI*, __pyx_t_9tesseract_cchar_t*)’:
    tesserocr.cpp:16600:88: error: no matching function for call to ‘tesseract::TessHOcrRenderer::TessHOcrRenderer(__pyx_t_9tesseract_cchar_t*&amp;, bool&amp;)’
           __pyx_t_2 = new tesseract::TessHOcrRenderer(__pyx_v_outputbase, __pyx_v_font_info);
                                                                                            ^
    tesserocr.cpp:16600:88: note: candidates are:
    In file included from tesserocr.cpp:459:0:
    /usr/include/tesseract/renderer.h:175:3: note: tesseract::TessHOcrRenderer::TessHOcrRenderer()
       TessHOcrRenderer();
       ^
    /usr/include/tesseract/renderer.h:175:3: note:   candidate expects 0 arguments, 2 provided
    /usr/include/tesseract/renderer.h:173:16: note: tesseract::TessHOcrRenderer::TessHOcrRenderer(const tesseract::TessHOcrRenderer&amp;)
     class TESS_API TessHOcrRenderer : public TessResultRenderer {
                    ^
    /usr/include/tesseract/renderer.h:173:16: note:   candidate expects 1 argument, 2 provided
    tesserocr.cpp:16643:106: error: no matching function for call to ‘tesseract::TessPDFRenderer::TessPDFRenderer(__pyx_t_9tesseract_cchar_t*&amp;, const char*)’
           __pyx_t_3 = new tesseract::TessPDFRenderer(__pyx_v_outputbase, __pyx_v_self-&gt;_baseapi.GetDatapath());
                                                                                                              ^
    tesserocr.cpp:16643:106: note: candidates are:
    In file included from tesserocr.cpp:459:0:
    /usr/include/tesseract/renderer.h:188:3: note: tesseract::TessPDFRenderer::TessPDFRenderer(const char*)
       TessPDFRenderer(const char *datadir);
       ^
    /usr/include/tesseract/renderer.h:188:3: note:   candidate expects 1 argument, 2 provided
    /usr/include/tesseract/renderer.h:186:16: note: tesseract::TessPDFRenderer::TessPDFRenderer(const tesseract::TessPDFRenderer&amp;)
     class TESS_API TessPDFRenderer : public TessResultRenderer {
                    ^
    /usr/include/tesseract/renderer.h:186:16: note:   candidate expects 1 argument, 2 provided
    tesserocr.cpp:16727:69: error: no matching function for call to ‘tesseract::TessUnlvRenderer::TessUnlvRenderer(__pyx_t_9tesseract_cchar_t*&amp;)’
           __pyx_t_4 = new tesseract::TessUnlvRenderer(__pyx_v_outputbase);
                                                                         ^
    tesserocr.cpp:16727:69: note: candidates are:
    In file included from tesserocr.cpp:459:0:
    /usr/include/tesseract/renderer.h:227:3: note: tesseract::TessUnlvRenderer::TessUnlvRenderer()
       TessUnlvRenderer();
       ^
    /usr/include/tesseract/renderer.h:227:3: note:   candidate expects 0 arguments, 1 provided
    /usr/include/tesseract/renderer.h:225:16: note: tesseract::TessUnlvRenderer::TessUnlvRenderer(const tesseract::TessUnlvRenderer&amp;)
     class TESS_API TessUnlvRenderer : public TessResultRenderer {
                    ^
    /usr/include/tesseract/renderer.h:225:16: note:   no known conversion for argument 1 from ‘__pyx_t_9tesseract_cchar_t* {aka const char*}’ to ‘const tesseract::TessUnlvRenderer&amp;’
    tesserocr.cpp:16811:72: error: no matching function for call to ‘tesseract::TessBoxTextRenderer::TessBoxTextRenderer(__pyx_t_9tesseract_cchar_t*&amp;)’
           __pyx_t_5 = new tesseract::TessBoxTextRenderer(__pyx_v_outputbase);
                                                                            ^
    tesserocr.cpp:16811:72: note: candidates are:
    In file included from tesserocr.cpp:459:0:
    /usr/include/tesseract/renderer.h:238:3: note: tesseract::TessBoxTextRenderer::TessBoxTextRenderer()
       TessBoxTextRenderer();
       ^
    /usr/include/tesseract/renderer.h:238:3: note:   candidate expects 0 arguments, 1 provided
    /usr/include/tesseract/renderer.h:236:16: note: tesseract::TessBoxTextRenderer::TessBoxTextRenderer(const tesseract::TessBoxTextRenderer&amp;)
     class TESS_API TessBoxTextRenderer : public TessResultRenderer {
                    ^
    /usr/include/tesseract/renderer.h:236:16: note:   no known conversion for argument 1 from ‘__pyx_t_9tesseract_cchar_t* {aka const char*}’ to ‘const tesseract::TessBoxTextRenderer&amp;’
    tesserocr.cpp:16895:69: error: no matching function for call to ‘tesseract::TessTextRenderer::TessTextRenderer(__pyx_t_9tesseract_cchar_t*&amp;)’
           __pyx_t_6 = new tesseract::TessTextRenderer(__pyx_v_outputbase);
                                                                         ^
    tesserocr.cpp:16895:69: note: candidates are:
    In file included from tesserocr.cpp:459:0:
    /usr/include/tesseract/renderer.h:164:3: note: tesseract::TessTextRenderer::TessTextRenderer()
       TessTextRenderer();
       ^
    /usr/include/tesseract/renderer.h:164:3: note:   candidate expects 0 arguments, 1 provided
    /usr/include/tesseract/renderer.h:162:16: note: tesseract::TessTextRenderer::TessTextRenderer(const tesseract::TessTextRenderer&amp;)
     class TESS_API TessTextRenderer : public TessResultRenderer {
                    ^
    /usr/include/tesseract/renderer.h:162:16: note:   no known conversion for argument 1 from ‘__pyx_t_9tesseract_cchar_t* {aka const char*}’ to ‘const tesseract::TessTextRenderer&amp;’
    tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_13PyTessBaseAPI_108IsValidCharacter(__pyx_obj_9tesserocr_PyTessBaseAPI*, PyObject*)’:
    tesserocr.cpp:19661:60: error: ‘class tesseract::TessBaseAPI’ has no member named ‘IsValidCharacter’
       __pyx_t_1 = __Pyx_PyBool_FromLong(__pyx_v_self-&gt;_baseapi.IsValidCharacter(__pyx_t_2)); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 2161, __pyx_L1_error)
                                                                ^
    tesserocr.cpp:544:36: note: in definition of macro ‘__Pyx_PyBool_FromLong’
     #define __Pyx_PyBool_FromLong(b) ((b) ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False))
                                        ^
    tesserocr.cpp: In function ‘void inittesserocr()’:
    tesserocr.cpp:25014:67: error: ‘PSM_RAW_LINE’ is not a member of ‘tesseract’
       __pyx_t_2 = __Pyx_PyInt_From_enum__tesseract_3a__3a_PageSegMode(tesseract::PSM_RAW_LINE); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 132, __pyx_L1_error)
                                                                       ^
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  
    ----------------------------------------
    Failed building wheel for tesserocr
    Running setup.py clean for tesserocr
  Failed to build tesserocr
  Installing collected packages: tesserocr
    Running setup.py install for tesserocr ... error
      Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-YcBV5a/tesserocr/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-KHSvyq-record/install-record.txt --single-version-externally-managed --compile:
      running install
      running build
      running build_ext
      pkg-config failed to find tesseract/lep libraries: Package tesseract was not found in the pkg-config search path.
      Perhaps you should add the directory containing `tesseract.pc'
      to the PKG_CONFIG_PATH environment variable
      No package 'tesseract' found
  
      Supporting tesseract v3.03
      Building with configs: {'libraries': ['tesseract', 'lept'], 'cython_compile_time_env': {'TESSERACT_VERSION': 771}}
      skipping 'tesserocr.cpp' Cython extension (up-to-date)
      building 'tesserocr' extension
      creating build
      creating build/temp.linux-x86_64-2.7
      x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c tesserocr.cpp -o build/temp.linux-x86_64-2.7/tesserocr.o
      cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++ [enabled by default]
      tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_14PyPageIterator_20SetBoundingBoxComponents(__pyx_obj_9tesserocr_PyPageIterator*, bool, bool)’:
      tesserocr.cpp:4622:25: error: ‘class tesseract::PageIterator’ has no member named ‘SetBoundingBoxComponents’
         __pyx_v_self-&gt;_piter-&gt;SetBoundingBoxComponents(__pyx_v_include_upper_dots, __pyx_v_include_lower_dots);
                               ^
      tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_14PyPageIterator_34GetImage(__pyx_obj_9tesserocr_PyPageIterator*, tesseract::PageIteratorLevel, int, PyObject*)’:
      tesserocr.cpp:5854:125: error: no matching function for call to ‘tesseract::PageIterator::GetImage(tesseract::PageIteratorLevel&amp;, int&amp;, Pix*&amp;, int*, int*)’
         __pyx_v_pix = __pyx_v_self-&gt;_piter-&gt;GetImage(__pyx_v_level, __pyx_v_padding, __pyx_v_opix, (&amp;__pyx_v_left), (&amp;__pyx_v_top));
                                                                                                                                   ^
      tesserocr.cpp:5854:125: note: candidate is:
      In file included from tesserocr.cpp:456:0:
      /usr/include/tesseract/pageiterator.h:239:8: note: Pix* tesseract::PageIterator::GetImage(tesseract::PageIteratorLevel, int, int*, int*) const
         Pix* GetImage(PageIteratorLevel level, int padding,
              ^
      /usr/include/tesseract/pageiterator.h:239:8: note:   candidate expects 4 arguments, 5 provided
      tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_13PyTessBaseAPI_74AnalyseLayout(__pyx_obj_9tesserocr_PyTessBaseAPI*, bool)’:
      tesserocr.cpp:16256:83: error: no matching function for call to ‘tesseract::TessBaseAPI::AnalyseLayout(bool&amp;)’
         __pyx_v_piter = __pyx_v_self-&gt;_baseapi.AnalyseLayout(__pyx_v_merge_similar_words);
                                                                                         ^
      tesserocr.cpp:16256:83: note: candidate is:
      In file included from tesserocr.cpp:461:0:
      /usr/include/tesseract/baseapi.h:489:17: note: tesseract::PageIterator* tesseract::TessBaseAPI::AnalyseLayout()
         PageIterator* AnalyseLayout();
                       ^
      /usr/include/tesseract/baseapi.h:489:17: note:   candidate expects 0 arguments, 1 provided
      tesserocr.cpp: In function ‘tesseract::TessResultRenderer* __pyx_f_9tesserocr_13PyTessBaseAPI__get_renderer(__pyx_obj_9tesserocr_PyTessBaseAPI*, __pyx_t_9tesseract_cchar_t*)’:
      tesserocr.cpp:16600:88: error: no matching function for call to ‘tesseract::TessHOcrRenderer::TessHOcrRenderer(__pyx_t_9tesseract_cchar_t*&amp;, bool&amp;)’
             __pyx_t_2 = new tesseract::TessHOcrRenderer(__pyx_v_outputbase, __pyx_v_font_info);
                                                                                              ^
      tesserocr.cpp:16600:88: note: candidates are:
      In file included from tesserocr.cpp:459:0:
      /usr/include/tesseract/renderer.h:175:3: note: tesseract::TessHOcrRenderer::TessHOcrRenderer()
         TessHOcrRenderer();
         ^
      /usr/include/tesseract/renderer.h:175:3: note:   candidate expects 0 arguments, 2 provided
      /usr/include/tesseract/renderer.h:173:16: note: tesseract::TessHOcrRenderer::TessHOcrRenderer(const tesseract::TessHOcrRenderer&amp;)
       class TESS_API TessHOcrRenderer : public TessResultRenderer {
                      ^
      /usr/include/tesseract/renderer.h:173:16: note:   candidate expects 1 argument, 2 provided
      tesserocr.cpp:16643:106: error: no matching function for call to ‘tesseract::TessPDFRenderer::TessPDFRenderer(__pyx_t_9tesseract_cchar_t*&amp;, const char*)’
             __pyx_t_3 = new tesseract::TessPDFRenderer(__pyx_v_outputbase, __pyx_v_self-&gt;_baseapi.GetDatapath());
                                                                                                                ^
      tesserocr.cpp:16643:106: note: candidates are:
      In file included from tesserocr.cpp:459:0:
      /usr/include/tesseract/renderer.h:188:3: note: tesseract::TessPDFRenderer::TessPDFRenderer(const char*)
         TessPDFRenderer(const char *datadir);
         ^
      /usr/include/tesseract/renderer.h:188:3: note:   candidate expects 1 argument, 2 provided
      /usr/include/tesseract/renderer.h:186:16: note: tesseract::TessPDFRenderer::TessPDFRenderer(const tesseract::TessPDFRenderer&amp;)
       class TESS_API TessPDFRenderer : public TessResultRenderer {
                      ^
      /usr/include/tesseract/renderer.h:186:16: note:   candidate expects 1 argument, 2 provided
      tesserocr.cpp:16727:69: error: no matching function for call to ‘tesseract::TessUnlvRenderer::TessUnlvRenderer(__pyx_t_9tesseract_cchar_t*&amp;)’
             __pyx_t_4 = new tesseract::TessUnlvRenderer(__pyx_v_outputbase);
                                                                           ^
      tesserocr.cpp:16727:69: note: candidates are:
      In file included from tesserocr.cpp:459:0:
      /usr/include/tesseract/renderer.h:227:3: note: tesseract::TessUnlvRenderer::TessUnlvRenderer()
         TessUnlvRenderer();
         ^
      /usr/include/tesseract/renderer.h:227:3: note:   candidate expects 0 arguments, 1 provided
      /usr/include/tesseract/renderer.h:225:16: note: tesseract::TessUnlvRenderer::TessUnlvRenderer(const tesseract::TessUnlvRenderer&amp;)
       class TESS_API TessUnlvRenderer : public TessResultRenderer {
                      ^
      /usr/include/tesseract/renderer.h:225:16: note:   no known conversion for argument 1 from ‘__pyx_t_9tesseract_cchar_t* {aka const char*}’ to ‘const tesseract::TessUnlvRenderer&amp;’
      tesserocr.cpp:16811:72: error: no matching function for call to ‘tesseract::TessBoxTextRenderer::TessBoxTextRenderer(__pyx_t_9tesseract_cchar_t*&amp;)’
             __pyx_t_5 = new tesseract::TessBoxTextRenderer(__pyx_v_outputbase);
                                                                              ^
      tesserocr.cpp:16811:72: note: candidates are:
      In file included from tesserocr.cpp:459:0:
      /usr/include/tesseract/renderer.h:238:3: note: tesseract::TessBoxTextRenderer::TessBoxTextRenderer()
         TessBoxTextRenderer();
         ^
      /usr/include/tesseract/renderer.h:238:3: note:   candidate expects 0 arguments, 1 provided
      /usr/include/tesseract/renderer.h:236:16: note: tesseract::TessBoxTextRenderer::TessBoxTextRenderer(const tesseract::TessBoxTextRenderer&amp;)
       class TESS_API TessBoxTextRenderer : public TessResultRenderer {
                      ^
      /usr/include/tesseract/renderer.h:236:16: note:   no known conversion for argument 1 from ‘__pyx_t_9tesseract_cchar_t* {aka const char*}’ to ‘const tesseract::TessBoxTextRenderer&amp;’
      tesserocr.cpp:16895:69: error: no matching function for call to ‘tesseract::TessTextRenderer::TessTextRenderer(__pyx_t_9tesseract_cchar_t*&amp;)’
             __pyx_t_6 = new tesseract::TessTextRenderer(__pyx_v_outputbase);
                                                                           ^
      tesserocr.cpp:16895:69: note: candidates are:
      In file included from tesserocr.cpp:459:0:
      /usr/include/tesseract/renderer.h:164:3: note: tesseract::TessTextRenderer::TessTextRenderer()
         TessTextRenderer();
         ^
      /usr/include/tesseract/renderer.h:164:3: note:   candidate expects 0 arguments, 1 provided
      /usr/include/tesseract/renderer.h:162:16: note: tesseract::TessTextRenderer::TessTextRenderer(const tesseract::TessTextRenderer&amp;)
       class TESS_API TessTextRenderer : public TessResultRenderer {
                      ^
      /usr/include/tesseract/renderer.h:162:16: note:   no known conversion for argument 1 from ‘__pyx_t_9tesseract_cchar_t* {aka const char*}’ to ‘const tesseract::TessTextRenderer&amp;’
      tesserocr.cpp: In function ‘PyObject* __pyx_pf_9tesserocr_13PyTessBaseAPI_108IsValidCharacter(__pyx_obj_9tesserocr_PyTessBaseAPI*, PyObject*)’:
      tesserocr.cpp:19661:60: error: ‘class tesseract::TessBaseAPI’ has no member named ‘IsValidCharacter’
         __pyx_t_1 = __Pyx_PyBool_FromLong(__pyx_v_self-&gt;_baseapi.IsValidCharacter(__pyx_t_2)); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 2161, __pyx_L1_error)
                                                                  ^
      tesserocr.cpp:544:36: note: in definition of macro ‘__Pyx_PyBool_FromLong’
       #define __Pyx_PyBool_FromLong(b) ((b) ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False))
                                          ^
      tesserocr.cpp: In function ‘void inittesserocr()’:
      tesserocr.cpp:25014:67: error: ‘PSM_RAW_LINE’ is not a member of ‘tesseract’
         __pyx_t_2 = __Pyx_PyInt_From_enum__tesseract_3a__3a_PageSegMode(tesseract::PSM_RAW_LINE); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 132, __pyx_L1_error)
                                                                         ^
      error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  
      ----------------------------------------
  Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-YcBV5a/tesserocr/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-KHSvyq-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-YcBV5a/tesserocr/
  </code></pre>