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While the Free Pascal Compiler comes pre-built for several processor architectures and operating systems, there may be occasions where a pre-built compiler won't do, and you need to build it yourself. There are a number of reasons for doing this, including:. There are a number of ways to install the Free Pascal Compiler and its libraries on your system.

The current version and trunk, and sometimes beta and release candidates, are available directly from the FPC website tar, exe, rpm, dmg, pkg files.

In addition, versions of FPC are provided including rpm and deb files from the Lazarus download site. Linux users can almost certainly find FPC in their distribution's repositories but may find that it is outdated. It is possible to build FPC from source, typically each release needs to be built with the previous release.

It is possible to install FPC in the application space often requiring root or administrator access or in a your own user space. These things depend on your particular operating system.

Note: You have a number of way to install FPC presented here, which one is best for you depends very much on what you are planning to do and if you need a very current version. With the recent release of FPC 3. You can do one of -.

Another option is installing from a tar, an easy and possibly even more useful model. These tars are available for a wide range of Unix like systems. You install FPC this way in your own space, not as root.

Here is a series of commands, not a script, that will install FPC on a 64 bit Linux system. It could be scripted but would would need sanity and error checking.

Note: A tar install does not resolve dependencies , if they are not already present, first install binutils, make, gcc. Note: The second wget above assumes you are working with an amd64 AMD or Intel type machine, other platforms require a different tar ball. For example, for a Raspberry Pi , you would use -. The repository keeps track of all the changes by developers in the source tree and has multiple branches. Anyone can download but not upload the source using either git or, easier if you want a one off snapshot, zip.

And possibly even SVN. The default is to get the main aka trunk version of the source but you also select any one of the very many branches or tags. Git - is most appropriate if you are going to add or sorrect something in the source and submit your change to the developers. Its a bigger and slower download but once done, easy to keep up to date. Note that its very unlikely contributions to anything other than main will be accepted.

Here is an example initial download of main, assuming you already have git installed -. Once the git download is finished, cd into the new directory and build as documented below. You can now keep your git repository up to date using the normal git commands. Zip - a possibly easier option is to download a "zip ball' archive of the source, from the web interface you can select which branch or tag you are interested in combo box that defaults to 'main'.

There are quite a lot of branches and tags to choose from, so please choose carefully. The web interface will let you download the zip of the selected branch or tag directly or command line people may do one of with the last part of command line indicating which branch -.

The documentation sources are in a separate repository called fpcdocs, so the command to get them is:. If you want to learn more about subversion, read this excellent Subversion book which is also available online in different formats for free.

For more information, see the Free Pascal website. Note: If you wish to also install Lazarus, you can omit installing FPC with the steps below as the Lazarus port will install it for you. FPC is scattered over !

For i bit FreeBSD, download from i Replace the desired Free Pascal version 3. If you get Bad substitution error, make sure you run script with bash. If you are on FreeBSD 12 or newer, the default linker is the lld.

This may cause problems if you have code that uses, for example, the cthreads unit as in the following program:. The executable generated for this program will cause a segmentation fault when run. To fix this issue, you need to install the GNU linker:. For i bit OpenBSD, download from i If you get Bad subtitution error, make sure you run script with bash. OpenBSD uses ksh as default shell. You need to install bash manually. A starting bootstrap FPC compiler. By far the easiest way to get a working installation of the Free Pascal Compiler is to download and run the appropriate self-extracting Windows installer from the official SourceForge repository for FPC 3.

The Windows installer packages install very easily, and should work 'out-of-the-box'. You will be taken through a typical Windows installation wizard to install the FPC binaries and Free Pascal libraries:. Installing from source with a command line git client is not for novices, since you also need a working bootstrap compiler to be able to compile the Free Pascal Compiler from source. Instructions for obtaining a bootstrap compiler are included below.

The easiest way to get the Free Pascal Compiler source is by using a git client. The exact commands may vary between git clients; the commands given below are for the command line git client downloadable from GitForWindows.

First create a directory in which you'd like to keep the source. Any normal user can do this. Wait while the git repository is downloaded to the fpc This can take a while New Forum users are always welcome.

There are two current non-release branches of the Free Pascal Compiler: the development main branch and the Fixes 3. Developers, and those who like living on the bleeding edge and testing new features and fixes, will choose the development version; more normal users, who wish to use a stable branch with some additional fixes since the latest release version, will choose the Fixes branch. The instructions below cover both these branches.

Now type the following command at a command prompt:. To obtain a bootstrap Free Pascal Compiler, download the distribution package fpc The installer should set the PATH environment variable as appropriate. Xcode is a 12GB download which will take up 16GB of disk space. You only need to download and install the full Xcode development environment if you need:.

Xcode Note that you must first move any old Xcode versions from the Applications folder into the trash or rename the Xcode app eg Xcode. You can select which version of Xcode to use with the command line utility xcode-select. The developer tools can be installed from the original macOS installation disks or a newer copy downloaded from the Apple Developer Connection ADC , which requires free registration. Download the Xcode file, it will end up in your Downloads directory as a zip file.

Click it. It is unarchived into your Downloads directory. You may be happy with it there but maybe not. Other users will see the path to it but be unable to use it. And it is untidy there. So I moved mine and then told xcode-select where it was moved to in a terminal -.

This is shown here as a separate step because it really is a separate step in addition to Step 1. Don't confuse this with the internal Xcode command line tools that the Xcode GUI will tell you are already installed. FPC does not use those Xcode internal command line tools, so do the following it is quick and easy -. You only need to enter the first of the two commands above unless you have also installed the full Xcode package. If you have only installed the command line tools, you should omit entering the xcodebuild command.

When you arrive at the download page, select a mirror and then choose the correct version for your operating system. These installation packages are built by the FPC developers and track formal releases.

As these installation packages are not code signed nor notarized by Apple, you need to either control-click on the installation package and choose "Open" or right-click on the installation package and choose "Open" in the contextual menu and confirm you want to install from an Unknown Developer.

There are two current non-release branches of the Free Pascal Compiler: the development trunk branch and the Fixes 3. Note that since the development version of FPC was known as "trunk" in SVN; now known as "main" in GIT is by definition still under development, some of the features may still change before they end up in a release version.

You don't need to be root to do this. To subsequently update your local source repository with the latest source changes you can simply do:. For example:. Note that you will need to build a new ppc compiler if you want to continue to compile 32 bit applications by replacing these lines this is not be possible after Xcode To subsequently update your local copy of the repository source with the latest source changes you can simply do:.

Note that you will need to build a new ppc compiler if you want to continue to compile 32 bit applications by replacing these lines this may not be possible after Xcode You might like to try a simple and quick test of FPC at this stage. It should very quickly make an executable called, you guessed it, "helloworld".