Install TesseractOCR 4.1.1 on CentOS

install.sh

# ================Install Leptonca library================

# step 01
yum install -y zlib-devel libpng-devel openjpeg-devel libtiff-devel libwebp-devel libtool automake
#step 02
git clone https://github.com/DanBloomberg/leptonica
#step 03
cd leptonica
export CC=${CC:-gcc} 
sh ./autogen.sh
#step 04
CFLAGS="-std=gnu99"
./configure CFLAGS="${CFLAGS}"
#step 05
make 
make install

# ================Install Tesseract 4.1.1================
# step 01
wget https://github.com/tesseract-ocr/tesseract/archive/4.1.1.tar.gz

# step 02
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 03	
./autogen.sh

# step 04
./configure --prefix= --with-extra-libraries=/usr/local/lib

# step 05
make
sudo make install
sudo ldconfig