You have to first set two environment variables

1. IOS_LIBS_OUTPUT the destination of the compile library
2. IOS_TOOLCHAIN the toolchain that cmake should use to compile the project for ios platform. The toolchain can be found here (https://github.com/leetal/ios-cmake).

Then run the script

./build-ios.sh

It will build and install zxing library in $IOS_LIBS_OUTPUT. The library is build for every iOS platform (e.g. armv7, arm64, ...) and the binaries are then packed together inside the same static archive (libzxing.a).

For android, you should use this cmake project as a native dependency from your main project.

Note: You might want to check this (https://github.com/ScanTrust/android-libs/blob/feature/use-jni-sdk/android-sdk/build.gradle)

TODO Explain the android build process!!

To compile the library on your machine just run the following commands

# cd to project root
mkdir build # if not existing
cd build
cmake ..
cmake install

ZXing is/was a Java library.

At some point a complete C++ port/rewrite was created and maintained in the official ZXing repo. However, at the time of writing the C++ port is no longer maintained and has been removed from the official ZXing repo.

This project was forked from the last ZXing commit to contain the C++ project, with the following exceptions

• scons (Python) build system has been deleted.
• Deleted black box tests, because they refer to a large test data in ZXing repo.
• Added appropriate copyright/licensing details (based on those in the ZXing repo).
• Updated README.md

Removal of build systems was done to minimise maintenance burden.

If tests and XCode projects (other than those produced automatically be CMake) are desired, then another repo should be created and this repo referenced as a submodule.

CMake is a tool, that generates native makefiles and workspaces. It integrates well with a number of IDEs including Qt Creator and Visual Studio.

Usage with CLion or Qt Creator:

1. Simply open CMakeLists.txt as a new project
2. Additional command line arguments can be specified (see below)

Usage with Makefiles, Visual Studio, etc. (see cmake --help for a complete list of generators):

1. mkdir build
2. cd to build
3. Unix: run cmake -G "Unix Makefiles" ..
4. Windows: run cmake -G "Visual Studio 10" ..

You can switch between build modes by specifying:

• -DCMAKE_BUILD_TYPE=Debug or
• -DCMAKE_BUILD_TYPE=Release

When build on a system where opencv is installed the open cv bridge classes and executable will be built too.

To profile the code (very useful to optimize the code):

1. Install Valgrind
2. Run valgrind --tool=callgrind build/zxing - path/to/test/data/*.jpg > report.html
3. Analyze output using KCachegrind