Commit 5959d81f authored by Alexander Alekhin's avatar Alexander Alekhin
Browse files

cmake: fix tesseract detection 

tesseract 4.x headers require C++11 (can't be used by OpenCV 3.4 without C++11)
parent 4c2ef476

modules/text/CMakeLists.txt

+15 −18
Original line number Diff line number Diff line 
set(the_description "Text Detection and Recognition")

ocv_define_module(text opencv_ml opencv_imgproc opencv_core opencv_features2d opencv_dnn OPTIONAL opencv_highgui WRAP python java)



if(NOT CMAKE_CROSSCOMPILING OR OPENCV_FIND_TESSERACT)

  find_package(Tesseract QUIET)  # Prefer CMake's standard locations (including Tesseract_DIR)

  if(NOT Tesseract_FOUND)

    include("${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindTesseract.cmake")  # OpenCV's fallback

  endif()

  if(Tesseract_FOUND)

    if(Tesseract_VERSION)

      message(STATUS "Tesseract:   YES (ver ${Tesseract_VERSION})")

    else()

      message(STATUS "Tesseract:   YES (ver unknown)")

set(__extra_deps "")

if(DEBUG_opencv_text)

  list(APPEND __extra_deps PRIVATE opencv_highgui)

endif()

    set(HAVE_TESSERACT 1)



ocv_define_module(text

    opencv_ml opencv_imgproc opencv_core opencv_features2d opencv_dnn

    ${__extra_deps}

    WRAP

      python

      java

)



if(HAVE_TESSERACT)

  ocv_include_directories(${Tesseract_INCLUDE_DIRS})

  ocv_target_link_libraries(${the_module} ${Tesseract_LIBRARIES})

  else()

    message(STATUS "Tesseract:   NO")

  endif()

endif()



configure_file(${CMAKE_CURRENT_SOURCE_DIR}/text_config.hpp.in

modules/text/cmake/checks/tesseract_test.cpp

0 → 100644
+12 −0
Original line number Diff line number Diff line 
#if !defined(USE_STD_NAMESPACE)

#define USE_STD_NAMESPACE

#endif

#include <tesseract/baseapi.h>

#include <tesseract/resultiterator.h>



static void test()

{

    tesseract::TessBaseAPI tess;

}



int main() { test(); return 0; }

modules/text/cmake/init.cmake

0 → 100644
+39 −0
Original line number Diff line number Diff line 
OCV_OPTION(WITH_TESSERACT "Include Tesseract OCR library support" (NOT CMAKE_CROSSCOMPILING)

  VERIFY HAVE_TESSERACT)



if(NOT HAVE_TESSERACT

    AND (WITH_TESSERACT OR OPENCV_FIND_TESSERACT)

)

  if(NOT Tesseract_FOUND)

    find_package(Tesseract QUIET)  # Prefer CMake's standard locations (including Tesseract_DIR)

  endif()

  if(NOT Tesseract_FOUND)

    include("${CMAKE_CURRENT_LIST_DIR}/FindTesseract.cmake")  # OpenCV's fallback

  endif()

  if(Tesseract_FOUND)

    if(Tesseract_VERSION)

      message(STATUS "Tesseract:   YES (ver ${Tesseract_VERSION})")

    else()

      message(STATUS "Tesseract:   YES (ver unknown)")

    endif()

    if(NOT ENABLE_CXX11 AND NOT OPENCV_SKIP_TESSERACT_BUILD_CHECK)

      try_compile(__VALID_TESSERACT

        "${OpenCV_BINARY_DIR}/cmake_check/tesseract"

        "${CMAKE_CURRENT_LIST_DIR}/checks/tesseract_test.cpp"

        CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${Tesseract_INCLUDE_DIRS}"

        LINK_LIBRARIES ${Tesseract_LIBRARIES}

        OUTPUT_VARIABLE TRY_OUT

        )

      if(NOT __VALID_TESSERACT)

        if(OPENCV_DEBUG_TESSERACT_BUILD)

          message(STATUS "${TRY_OUT}")

        endif()

        message(STATUS "Can't use Tesseract (details: https://github.com/opencv/opencv_contrib/pull/2220)")

        return()

      endif()

    endif()

    set(HAVE_TESSERACT 1)

  else()

    message(STATUS "Tesseract:   NO")

  endif()

endif()