doratex/clang9-objc2 repository overview

⁠Dockerfile to build an Objective-C 2.0 development environment

This repository contains Dockerfiles to build Docker images that consist of:

• Ubuntu 19.10 / 18.04
• Clang 9
• GNUstep
• libobjc2

By using this Docker container, you can compile Objective-C 2.0 sources with Clang 9. Since libobjc2 is set up, you can use the modern Objective-C features in your Objective-C sources, such as:

• Automatic Reference Counting (ARC)
• Blocks
• Dot Notation
• Object Literal
• Object Subscripting
• Fast Enumeration
• Lightweight Generics
• Grand Central Dispatch (GCD)

⁠Usage

⁠Pull or build Docker image

$ docker pull doratex/clang9-objc2:latest

or you can build the Docker image by yourself.

$ cd Dockerfile/ubuntu1910
$ docker build --no-cache=true -t clang9-objc2:ubuntu1910 .

The Dockerfiles are available at my GitHub repository⁠.

⁠Run Docker container and compile your Objective-C sources

$ docker run --rm -it -v $(pwd):/workdir doratex/clang9-objc2:latest /bin/bash
# clang-objc -o foobar foobar.m
# ./foobar

The clang-objc command is just an alias that is set in ~/.bashrc as follows.

alias clang-objc="\${CC} \$(gnustep-config --objc-flags) \$(gnustep-config --objc-libs) -fobjc-arc -lobjc -ldispatch -lgnustep-base"

⁠Test various Objective-C 2.0 features

test directory is included in my GitHub repository⁠ along with the Dockerfiles. You can test various Objective-C 2.0 features using test_all.sh.

$ docker run --rm -it -v $(pwd):/workdir doratex/clang9-objc2:latest /bin/bash
# cd test
# ./test_all.sh

Note that the last GUI test does not pass without X Window System.

⁠Acknowledgments

I owe most of these building procedures and test files to @plaurent⁠'s GitHub repository⁠.