Lazarus on RPi
Lazarus is a cross-platform IDE for Free Pascal, a professional 32 bit / 64 bit Pascal Compiler. Lazarus supports a wide variety of processors and Linux distributions including the Raspberry Pi, where it runs natively.
In the Raspbian distribution Lazarus and Free Pascal are easily installed with the following shell commands:
sudo apt-get update sudo apt-get upgrade sudo apt-get install fpc sudo apt-get install lazarus
This installs a ready-to-use precompiled version of Lazarus, however not necessarily the newest one.
Compiling from sources
The newest versions of Lazarus are distributed as source code. In order to compile Lazarus from subversion sources see Michell Computing: Lazarus on the Raspberry Pi for details. An updated version covering Free Pascal 2.7.x is the article FreePascal 2.7.1 on Raspberry Pi by the same author.
The article How to install Lazarus Pascal on Raspberry Pi 2 (Raspbian) is a comprehensive description of the steps that are necessary to install a trunk version of Lazarus 1.5.x on the Raspberry Pi 2.
Accessing low-level hardware
Hardware hacking is easily possible with the Lazarus wrapper unit for Gordon Henderson's wiringPi C library (see below). Alternatively, the GPIO port is also accessible directly from Free Pascal as described in the article on RPi Low-level peripherals or, in more detail, in the Lazarus Wiki.
- Additional information about Lazarus on Raspberry Pi in the Free Pascal wiki (covers also i/o over the GPIO terminal)
- Lazarus wrapper unit for Gordon Henderson's wiringPi C library
- Lazberry Pi: Comprehensive information on Lazarus on the Raspberry Pi computer.
- Improved Lazarus Unit for fast access to GPIO.