Step 1: build Leptonica Library
CentOS 7 : how to build Leptonica Library
Step 2: download source
[root@tutorialspots ~]# wget https://github.com/tesseract-ocr/tesseract/archive/4.1.1.tar.gz
--2020-08-14 07:44:32-- https://github.com/tesseract-ocr/tesseract/archive/4.1.1.tar.gz
Resolving github.com (github.com)... 140.82.114.3
Connecting to github.com (github.com)|140.82.114.3|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/tesseract-ocr/tesseract/tar.gz/4.1.1 [following]
--2020-08-14 07:44:32-- https://codeload.github.com/tesseract-ocr/tesseract/tar.gz/4.1.1
Resolving codeload.github.com (codeload.github.com)... 140.82.113.10
Connecting to codeload.github.com (codeload.github.com)|140.82.113.10|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/x-gzip]
Saving to: ‘4.1.1.tar.gz’
[ <=> ] 1,974,988 5.84MB/s in 0.3s
2020-08-14 07:44:33 (5.84 MB/s) - ‘4.1.1.tar.gz’ saved [1974988]
Step 3:
tar xvf 4.1.1.tar.gz cd tesseract-4.1.1 export LIBLEPT_HEADERSDIR=/usr/local/include/leptonica export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
Step 4:
./autogen.sh
Result:
[root@tutorialspots tesseract-4.1.1]# ./autogen.sh Running aclocal Running /usr/bin/libtoolize libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, `config'. libtoolize: copying file `config/ltmain.sh' libtoolize: putting macros in AC_CONFIG_MACRO_DIR, `m4'. libtoolize: copying file `m4/libtool.m4' libtoolize: copying file `m4/ltoptions.m4' libtoolize: copying file `m4/ltsugar.m4' libtoolize: copying file `m4/ltversion.m4' libtoolize: copying file `m4/lt~obsolete.m4' Running autoconf Running autoheader Running automake --add-missing --copy configure.ac:86: installing 'config/config.guess' configure.ac:86: installing 'config/config.sub' configure.ac:27: installing 'config/install-sh' configure.ac:27: installing 'config/missing' src/api/Makefile.am: installing 'config/depcomp' parallel-tests: installing 'config/test-driver' All done. To build the software now, do something like: $ ./configure [--enable-debug] [...other options]
Step 5:
./configure --prefix= --with-extra-libraries=/usr/local/lib
Result:
... config.status: creating java/Makefile config.status: creating java/com/Makefile config.status: creating java/com/google/Makefile config.status: creating java/com/google/scrollview/Makefile config.status: creating java/com/google/scrollview/events/Makefile config.status: creating java/com/google/scrollview/ui/Makefile config.status: creating doc/Makefile config.status: creating config_auto.h config.status: executing depfiles commands config.status: executing libtool commands Configuration is done. You can now build and install tesseract by running: $ make $ sudo make install $ sudo ldconfig Documentation will not be built because asciidoc or xsltproc is missing. You can not build training tools because of missing dependency. Check configure output for details.
Step 6:
make -j install
Result:
... make[3]: Leaving directory `/root/tesseract-4.1.1/tessdata/tessconfigs' make[2]: Leaving directory `/root/tesseract-4.1.1/tessdata/tessconfigs' make[2]: Entering directory `/root/tesseract-4.1.1/tessdata' make[3]: Entering directory `/root/tesseract-4.1.1/tessdata' make[3]: Nothing to be done for `install-exec-am'. /usr/bin/mkdir -p '/share/tessdata' /usr/bin/install -c -m 644 pdf.ttf '/share/tessdata' make[3]: Leaving directory `/root/tesseract-4.1.1/tessdata' make[2]: Leaving directory `/root/tesseract-4.1.1/tessdata' make[1]: Leaving directory `/root/tesseract-4.1.1/tessdata' Making install in doc make[1]: Entering directory `/root/tesseract-4.1.1/doc' make[2]: Entering directory `/root/tesseract-4.1.1/doc' make[2]: Nothing to be done for `install-exec-am'. make[2]: Leaving directory `/root/tesseract-4.1.1/doc' make[1]: Leaving directory `/root/tesseract-4.1.1/doc' Making install in unittest make[1]: Entering directory `/root/tesseract-4.1.1/unittest' make[2]: Entering directory `/root/tesseract-4.1.1/unittest' make[2]: Nothing to be done for `install-exec-am'. make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/root/tesseract-4.1.1/unittest' make[1]: Leaving directory `/root/tesseract-4.1.1/unittest'
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