cmake 和 tesseract，如何使用 cmake 进行链接

Question

I'm trying to build my application against tesseract, which i have installed through brew (working on mac os x).

While i can compile my application without problem using g++ and pkg-config, i'm not sure how to do the same with cmake.

I tried FIND_PACKAGE tesseract REQUIRED but it can't seem to find it. Does anyone have a sample CMakeLists.txt ?

Appreciate the help.

Answer 1

It seems the only (or the easiest) way to use tesseract in your project with CMake is to download tesseract sources (from here ) The build with the following steps:

cd <Tesseract source directory>
mkdir build
cd build
cmake ../
make
sudo make install

Specify "Tesseract_DIR" environment variable to the directory you just created for tesseract.

Then in the CMakeLists.txt file of your project you should have the following lines:

find_package( Tesseract 3.05 REQUIRED ) # 3.05 is currently the latest version of the git repository.
include_directories(${Tesseract_INCLUDE_DIRS})
target_link_libraries(<your_program_executable> ${Tesseract_LIBRARIES})  # you can link here multiple libraries as well.

After the all just build your project with cmake.

Answer 2

I used the following findpkgconfig command, it works for me on MacOS with brew packages.

find_package( PkgConfig REQUIRED)

pkg_search_module( TESSERACT REQUIRED tesseract )

pkg_search_module( LEPTONICA REQUIRED lept )

include_directories( ${TESSERACT_INCLUDE_DIRS} )

include_directories( ${LEPTONICA_INCLUDE_DIRS} )

link_directories( ${TESSERACT_LIBRARY_DIRS} )

link_directories( ${LEPTONICA_LIBRARY_DIRS} )

add_executable( FOOBAR main )

target_link_libraries( FOOBAR ${TESSERACT_LIBRARIES} )

target_link_libraries( FOOBAR ${LEPTONICA_LIBRARIES} )

Answer 3

Since you are linking against the library and not an installed package, you can just add it like you would link any other library into cmake

target_link_libraries( your_project tesseract )

this is the equivalent of adding -ltesseract to your g++ command line

Answer 4

Can't comment on Long's answer due to lack of rep, but using

target_link_libraries( FOOBAR ${TESSERACT_LINK_LIBRARIES})

target_link_libraries( FOOBAR ${LEPTONICA_LINK_LIBRARIES})

worked for me, after using the same findpkgconfig method. Using:

target_link_libraries( FOOBAR ${TESSERACT_LIBRARIES})

gave me a linker error when compiling