As described and discussed here:
https://stackoverflow.com/questions/78011753/how-to-correctly-define-cmakelists-txt-for-tesseract
I've been trying to use CMake for Tesseract compilation and building
With this CMakeLists.txt :
cmake_minimum_required(VERSION 3.5)
project(BasicExample)
set(CMAKE_CXX_STANDARD 17)
find_package(PkgConfig REQUIRED)
pkg_check_modules(tesseract REQUIRED IMPORTED_TARGET tesseract)
pkg_check_modules(leptonica REQUIRED IMPORTED_TARGET lept)
pkg_check_moduleS(libcurl REQUIRED IMPORTED_TARGET libcurl)
add_executable(${PROJECT_NAME} WIN32 MACOSX_BUNDLE BasicExample.cpp)
target_link_libraries(BasicExample PUBLIC
PkgConfig::leptonica
PkgConfig::tesseract
-lcurl
)
I get these errors:
raphy@raohy:~/tesseract/Examples$ cmake -B builddir
-- The C compiler identification is GNU 12.3.0
-- The CXX compiler identification is GNU 13.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "1.8.1")
-- Checking for module 'tesseract'
-- Found tesseract, version 5.3.4
-- Checking for module 'lept'
-- Found lept, version 1.82.0
-- Checking for module 'libcurl'
-- Found libcurl, version 8.2.1
-- Configuring done (0.3s)
-- Generating done (0.0s)
-- Build files have been written to:
/home/raphy/tesseract/Examples/builddir
raphy@raohy:~/tesseract/Examples$
raphy@raohy:~/tesseract/Examples$ cmake --build builddir/
[ 50%] Building CXX object
CMakeFiles/BasicExample.dir/BasicExample.cpp.o
[100%] Linking CXX executable BasicExample
/usr/bin/ld: /usr/local/lib/libtesseract.a(baseapi.cpp.o): in function
`tesseract::TessBaseAPI::ProcessPagesInternal(char const*, char const*,
int, tesseract::TessResultRenderer*)::{lambda(char
const*)#1}::operator()(char const*) const':
baseapi.cpp:(.text+0x13): undefined reference to `curl_easy_strerror'
/usr/bin/ld: baseapi.cpp:(.text+0x3b): undefined reference to
`curl_easy_cleanup'
/usr/bin/ld: /usr/local/lib/libtesseract.a(baseapi.cpp.o): in function
`tesseract::TessBaseAPI::ProcessPagesInternal(char const*, char const*,
int, tesseract::TessResultRenderer*)':
baseapi.cpp:(.text+0xad07): undefined reference to `curl_easy_init'
/usr/bin/ld: baseapi.cpp:(.text+0xad48): undefined reference to
`curl_easy_setopt'
/usr/bin/ld: baseapi.cpp:(.text+0xad5d): undefined reference to
`curl_easy_strerror'
/usr/bin/ld: baseapi.cpp:(.text+0xad89): undefined reference to
`curl_easy_cleanup'
/usr/bin/ld: baseapi.cpp:(.text+0xb26f): undefined reference to
`curl_easy_setopt'
/usr/bin/ld: baseapi.cpp:(.text+0xb298): undefined reference to
`curl_easy_setopt'
/usr/bin/ld: baseapi.cpp:(.text+0xb2c1): undefined reference to
`curl_easy_setopt'
/usr/bin/ld: baseapi.cpp:(.text+0xb2fa): undefined reference to
`curl_easy_setopt'
/usr/bin/ld: baseapi.cpp:(.text+0xb324): undefined reference to
`curl_easy_setopt'
/usr/bin/ld:
/usr/local/lib/libtesseract.a(baseapi.cpp.o):baseapi.cpp:(.text+0xb3c9):
more undefined references to `curl_easy_setopt' follow
/usr/bin/ld: /usr/local/lib/libtesseract.a(baseapi.cpp.o): in function
`tesseract::TessBaseAPI::ProcessPagesInternal(char const*, char const*,
int, tesseract::TessResultRenderer*)':
baseapi.cpp:(.text+0xb455): undefined reference to `curl_easy_perform'
/usr/bin/ld: baseapi.cpp:(.text+0xb6b0): undefined reference to
`curl_easy_cleanup'
/usr/bin/ld: /usr/local/lib/libtesseract.a(tessdatamanager.cpp.o): in
function `tesseract::TessdataManager::LoadArchiveFile(char const*)':
tessdatamanager.cpp:(.text+0x199): undefined reference to
`archive_read_new'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x1ad): undefined reference to
`archive_read_support_filter_all'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x1b5): undefined reference to
`archive_read_support_format_all'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x1c5): undefined reference to
`archive_read_open_filename'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x1e6): undefined reference to
`archive_entry_pathname'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x1f6): undefined reference to
`archive_read_next_header'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x208): undefined reference to
`archive_read_free'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x294): undefined reference to
`archive_entry_size'
/usr/bin/ld: tessdatamanager.cpp:(.text+0x2e1): undefined reference to
`archive_read_data'
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/BasicExample.dir/build.make:99: BasicExample]
Error 1
gmake[1]: *** [CMakeFiles/Makefile2:83:
CMakeFiles/BasicExample.dir/all] Error 2
gmake: *** [Makefile:91: all] Error 2
raphy@raohy:~/tesseract/Examples$
What am I missing? How to make it work?
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