Building Tesseract Leptonica from source

Step 1 - Prerequisites

First you need to install these tools:

• Xcode 6.1 (6A1052d) with command line tools
• M4
• Autoconf
• Automake
• Libtool

Step 2 - Download and unzip

Download the source code for leptonica-1.71 from the Internet here: http://leptonica.org/source/leptonica-1.71.tar.gz. Unzip it in this folder.

Download the source code for tesseract-3.03 from the Internet here: https://tesseract-ocr.googlecode.com/archive/3.03-rc1.tar.gz. Unzip it in this folder.

Step 3 - Compile

Run build_dependencies.sh from the terminal. This first compiles leptonica and then tesseract for every architecture iOS/simulator uses (arm7 arm7s arm64 i386 x86_64), and then combines the resulting libs into one library file. It does this for both leptonica and tesseract, so the final results of the script are "libtesseract_all.a", "liblept.a", and "include" directories for both leptonica and tesseract. Finally, the script copies these results into the "lib" and "include" directories inside this directory.

Step 4 - Build

Finally, with Tesseract OCR iOS.xcodeproj open in Xcode, build the target "TesseractOCRAggregate". This will use the "lib" and "include" directories to create the Tesseract OCR iOS framework.