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How to Build Julia From Source?

3 minutes read

To build Julia from source, you will first need to clone the Julia repository from GitHub. Next, make sure you have installed the necessary build tools, such as CMake, LLVM, and a C/C++ compiler. Then, navigate to the Julia directory and run the make command to begin the build process. This will compile the source code and create the Julia executable. Finally, you can run the julia executable to start using your newly built version of Julia.


How to build Julia from source using a specific build toolchain?

If you want to build Julia from source using a specific build toolchain, you can follow these steps:

  1. Clone the Julia repository from GitHub:
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git clone https://github.com/JuliaLang/julia.git
cd julia


  1. Install the required dependencies for building Julia:
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./contrib/download_cmake.sh
./contrib/download_prereq.sh


  1. Create a Make.user file in the Julia base directory with the configuration options for your specific build toolchain. For example, if you want to use clang as the compiler, you can add the following lines to the Make.user file:
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USECLANG=1


  1. Build Julia by running:
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make -j4


Replace 4 with the number of cores your system has for faster compilation.

  1. Once the build is finished, you should have a freshly built Julia binary in the usr/bin directory.


By following these steps, you should be able to build Julia from source using a specific build toolchain. Feel free to adjust the configuration options in the Make.user file to tailor the build to your specific needs.


What is the best way to test the newly built Julia binary?

The best way to test a newly built Julia binary is to run a variety of Julia scripts and packages to ensure that the binary is functioning correctly. This can include running basic arithmetic operations, testing various functions and libraries, as well as testing the performance of the binary by running more complex and computationally intensive scripts.


Additionally, it is important to test the compatibility of the binary with different operating systems and environments to ensure that it can run smoothly on a variety of platforms. Running benchmark tests can also help determine the performance of the binary compared to other versions or builds of Julia.


Overall, the key is to systematically test the functionality, performance, and compatibility of the newly built Julia binary in order to identify and address any potential issues or bugs.


How to update the source code before re-building Julia?

To update the source code before re-building Julia, you can follow these steps:

  1. Pull the latest changes from the Julia repository using a version control system like Git. You can do this by running the following command in your Julia repository directory:
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git pull origin master


  1. If needed, resolve any conflicts that may arise during the pulling process by following the instructions provided by Git.
  2. Once you have successfully pulled the latest changes, run the following command to update your local repository and checkout the latest branch: 
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git submodule update --init


  1. Finally, you can start the build process by following the appropriate build instructions for your system. This typically involves running the make command in the Julia repository directory. Make sure to read and follow any additional instructions provided in the Julia documentation or README file.


By following these steps, you can update the source code and rebuild Julia with the latest changes.

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