I already tried the pre-compiled Leptonica binary link but I read here that I have to build this from source only. So I tried building Leptonica from source.
I downloaded the source code of Leptonica from this [link].(https://github.com/tesseract-ocr/tesseract) Then I tried to build this code using CMake. To build I used CMake GUI. In source-code path I gave where CMakeLists.txt is located and in cross compiling option I gave this scripts\buildsystems\vcpkg.cmake from this link.
But I am getting this error
CMake Error at C:/vcpkg/scripts/buildsystems/vcpkg.cmake:247 (_find_package):
Could not find a package configuration file provided by "Leptonica" (requested version 1.74) with any of the following names:
LeptonicaConfig.cmake
leptonica-config.cmake
Add the installation prefix of "Leptonica" to CMAKE_PREFIX_PATH or set
"Leptonica_DIR" to a directory containing one of the above files.
If "Leptonica" provides a separate development package or SDK,
be sure it has been installed.
For this I build leptonica separately and generated this LeptonicaConfig.cmake file as asked in this error. But now I have to change the CMakeLists.txt and set Leptonica_DIR to the directory where my this LeptonicaConfig.cmake located. I don't know how to do this I tried adding this line in cmakelists file set(Leptonica_DIR="C:\Leptonica"). But this doesn't work, may be this is wrong.
I am really stuck, I am using tesseract4.0 and Leptonica 17.6 and really new to this building process.
Related
I am using Window 10, Visual Studio 2017. I have installed OpenCV properly and I can run some basic projects of C++ OpenCV that can be found around the internet.
I have also followed this video which shows How to Build Open Source Projects Using CMake and Visual Studio.
But, I can not run this project on my machine. I try File->Open->CMake to open the CMakeLists.txt which can be found in the downloaded repository, and I get this error:
CMake Error at C:\Users\Majid\Desktop\imgwarp-opencv\imgwarp-opencv\src\CMakeLists.txt:2 (FIND_PACKAGE):
By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "OpenCV", but
CMake did not find one.
Could not find a package configuration file provided by "OpenCV" with any
of the following names:
OpenCVConfig.cmake
opencv-config.cmake
Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set
"OpenCV_DIR" to a directory containing one of the above files. If "OpenCV"
provides a separate development package or SDK, be sure it has been
installed.
I think I must extract the downloaded opencv-4.0.1-vc14_vc15.exe file somewhere in the project folder and link the CMakeLists.txt file (which one?) to the OpenCVConfig.cmake which is in the extracted opencv. Or maybe not.
I have also CMake gui and if I should run it that way I will appreciate that you explain it that way instead of using Visual Studio File->Open->CMake. No matter how, any way that helps me run this project is welcome. Please explain it step by step.
In one line (forget all the above): What should I do to run this project properly?
I am following chapter-02/recipe-06 in "CMake Cookbook". This particular example requires the Eigen C++ libraries.
I attempted to build the example and got the error that Eigen was not found.
CMake Error at CMakeLists.txt:9 (find_package):
Could not find a package configuration file provided by "Eigen3" (requested
version 3.3) with any of the following names:
Eigen3Config.cmake
eigen3-config.cmake
Add the installation prefix of "Eigen3" to CMAKE_PREFIX_PATH or set
"Eigen3_DIR" to a directory containing one of the above files. If "Eigen3"
provides a separate development package or SDK, be sure it has been
installed.
This was expected because the library was not installed on my system.
I then downloaded the ".zip" file for the Eigen libraries and unzipped it to an arbitrary location outside of my project. I created a "build" folder in the Eigen directory and ran cmake .. in the "build" folder. (I only ran cmake - I did NOT build or install the package.)
After running CMake on the Eigen build directory, I went back to the example code for "recipe-06" and it was magically able to find the Eigen library and built successfully even though Eigen was never built or installed.
Somehow just running CMake in the Eigen project made CMake aware of the Eigen libraries location. After doing this, any projects that do find_package to find Eigen3 somehow get the ${Eigen3_DIR} variable defined and are able to find it.
Looking at the CMake documentation for find_package I don't see any explanation of why this works. Eigen is not in any of the typical locations that find_package searches. According to the documentation it looks like it should NOT be found.
Even more interesting - it doesn't matter where I put Eigen on my system. I can put it literally anywhere and it will still find it.
According to everything I see in the documentation it should not be found... but it is found. So the question is how? Why does this work?
Additional info: I am using CMake version 3.13.3
There are 2 "origins" of XXXConfig.cmake files, used internally by find_package() call.
Usually, XXXConfig.cmake file is produced when the project is installed, and the file contains information about installed libraries and headers.
But CMake provides also an export() command, which allows to export build tree.
export(PACKAGE <name>)
Store the current build directory in the CMake user package registry for package <name>. The find_package command may consider the directory while searching for package <name>.
Eigen's CMakeLists.txt uses export() command, so the project becomes detectable with find_package just after running cmake for Eigen.
I want to compile an open project, it needs Eigen3, I followed its guideline but stuck in this step:
"Set environment variable Eigen3_DIR to {YOUR_EIGEN3_DIRECTORY}/eigen3/cmake."
I have installed CMake gui and it printed following errors after configuration
Make Error at src/CMakeLists.txt:15 (find_package):
By not providing "FindEigen3.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Eigen3", but
CMake did not find one.
Could not find a package configuration file provided by "Eigen3" with any
of the following names:
Eigen3Config.cmake
eigen3-config.cmake
Add the installation prefix of "Eigen3" to CMAKE_PREFIX_PATH or set
"Eigen3_DIR" to a directory containing one of the above files. If "Eigen3"
provides a separate development package or SDK, be sure it has been
installed.
But I have downloaded Eigen3 from here, and set the Eigen3_DIR as follows
So what should I do to fix it? I am just a beginner in cmake.
I am assuming you are using Windows. You will need Visual Studio installed. You can use the community version. You will need to do the following:
Create a directory called "build" within your Eigen directory.
Go to the build directory and do "cmake ..". This will create Visual Studio projects.
Load the .sln using Visual Studio.
Build the solution.
Ensure that the project called INSTALL was built also.
This will create the Eigen3Config.cmake file in your install directory. In my case the install directory was "C:\Program Files(X86)\Eigen3. Use this to as the value for Eigen3_DIR variable.
By default Eigen does not come with the Eigen3Config.cmake file. You will see Eigen3Config.cmake.in file. This is used to build the Eigen3Config.cmake file.
HTH
I am trying to build the following c++ project from github on windows 64bit system:
synergy-through-usb.
It says I need to use cmake, so I have installed cmake latest version.
I then downloaded and unzipped the source code.
Then I ran cmake . in the folder, but I got the following error:
C:\local\projects\synergy-usb\synergy-through-usb-master>cmake .
You have called ADD_LIBRARY for library cryptopp without any source files. This typically indicates a problem with your CMakeLists.txt file
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
LIBUSB_1_INCLUDE_DIR
used as include directory in directory C:/local/projects/synergy-usb/synergy-through-usb-master/src/lib/arch
used as include directory in directory C:/local/projects/synergy-usb/synergy-through-usb-master/src/lib/net
LIBUSB_1_LIBRARY
linked by target "arch" in directory C:/local/projects/synergy-usb/synergy-through-usb-master/src/lib/arch
-- Configuring incomplete, errors occurred!
See also "C:/local/projects/synergy-usb/synergy-through-usb-master/CMakeFiles/CMakeOutput.log".
I am not familiar with cmake and also the links to the instructions / guide for this git repo seem to be removed:
http://synergy-project.org/projects/synergy/wiki/Readme/?hl=pm
http://synergy-project.org/projects/synergy/wiki/Compiling/?hl=pm
Can anyone help me compile this - i.e. suggest what I need to do to get around these errors? or has anyone tried to use this project?
I downloaded source of GDCM 2.4.1 and used CMake 2.8.12.1 and Visual Studio 2010 to build the libraries. I want to use GDCM in my C++ project.
Unfortunately, it seems that after building the GDCM solution with VS, there are only the lib-files in the bin folder, but no typical "include" folder with the header files, what I usually expect. Thus, I can't integrate GDCM libaries in my own project (I tried to use FindPackage(GDCM) in my own CMakeproject, but header files can't be found).
I do not want to copy the header files manually or target the source directory of GDCM.
Does anybody know help?
I found out that the problem has something to do with VTK, I also use the this library in my project. So I need to enable "GDCM_USE_VTK" in CMake of GDCM. That option leads to a compiler error when I try to build the "INSTALL" subproject in the GDCM solution:
CMake Error at cmake_install.cmake:31 (FILE): file INSTALL cannot find "D:/Libs/VTK_5.6.0/BIN/bin/vtkCommon.dll".
I took a look in the VTK directory and found out that the path mentioned above does not exists. Instead the dll is located in:
D:\Libs\VTK_5.6.0\BIN\bin\Release\vtkCommon.dll or
D:\Libs\VTK_5.6.0\BIN\bin\Debug\vtkCommon.dll
That means GDCM solution does not know the dll is located in a special debug or release folder. If I disable "GDCM_USE_VTK" everything works fine and all files will be copied to the target folder. But I do need the VTK dll.
Any thoughts?
Michael
For anyone who ever touches the same problem, here's the final solution. Build "ALL_BUILD" in the GDCM solution, then integrate GDCM libs in your CMakeLists.txt the following way:
FIND_PACKAGE(GDCM REQUIRED)
IF(GDCM_FOUND)
INCLUDE(${GDCM_USE_FILE})
SET(GDCM_LIBRARIES
gdcmcharls
gdcmCommon
gdcmDICT
gdcmDSED
gdcmexpat
gdcmgetopt
gdcmIOD
gdcmjpeg12
gdcmjpeg16
gdcmjpeg8
gdcmMEXD
gdcmMSFF
gdcmopenjpeg
gdcmzlib
socketxx
vtkgdcm
Rpcrt4)
ELSE(GDCM_FOUND)
MESSAGE(FATAL_ERROR "Cannot find GDCM, did you set GDCM_DIR?")
ENDIF(GDCM_FOUND)