Welcome to Fawlty Language!

Fawlty Language is an IDL8 (Interactive Data Language) compatible compiler (IDL is a registered trademark of NV5 Geospatial Solutions, Inc.

Features:

• all language elements are supported
• multithreaded operators
• profiling
• about 900 library functions
• true-color (24 bit) direct graphics devices: X, WIN, PS, PDF, Z
• GIF/JPEG/PNG/TIFF read/write support
• CDF/NetCDF/HDF4 (SD only) read/write support

License:

FL is freeware, you can use it without any restriction, you can even redistribute it if you want.

Update for Windows users

Qt 6 changed HiDPI scaling on Windows and FL is not handling this properly, resulting in TVRD() crashing with FullHD+ displays. If you encounter this bug, set the QT_ENABLE_HIGHDPI_SCALING environment variable to 0 before starting FL. (Modifying the global environment is not recommended, as other Qt applications may need HiDPI scaling, it is better to create a batch file to start FL with this setting.)

Download

• Changelog

FL 0.79.54 current development snapshot (21/Jan/2024)

• Linux 64 bit, AMD64 (x86-64), AlmaLinux 8 or compatible: fl_0.79.54-amd64-linux.tar.gz
• Windows 10 1809 or newer, AMD64 (x86-64): fl_0.79.54-amd64-windows.zip
• MacOS 11 or newer, AMD64 (x86-64): fl_0.79.54-amd64-macos.dmg
• Linux 64 bit, AARCH64 (eg. Raspberry Pi 4), AlmaLinux 8 or compatible: fl_0.79.54-aarch64-linux.tar.gz

Experimental builds:

• Linux 64 bit, PowerPC 64 little-endian, AlmaLinux 8 or compatible: fl_0.79.54-ppc64le-linux.tar.gz
• Linux 64 bit, RISC-V 64, Ubuntu 22.04 or compatible: fl_0.79.54-riscv64-linux.tar.gz
• Linux 64 bit, S390X, AlmaLinux 8 or compatible: fl_0.79.54-s390x-linux.tar.gz

FL 0.79.53 previous development snapshot (10/Apr/2023)

• Linux 64 bit, AMD64 (x86-64), CentOS 7 or compatible: fl_0.79.53-amd64-linux.tar.gz
• Windows 10 1809 64 bit or newer: fl_0.79.53-amd64-windows.zip
• MacOS 11 or newer, Intel x86-64: fl_0.79.53-amd64-macosx.dmg
• Linux 64 bit, AARCH64 (eg. Raspberry Pi 4), CentOS 7 or compatible: fl_0.79.53-aarch64-linux.tar.gz

Note for Linux users:

Qt6 requires a lot of X11 libraries. The ldd /path/to/fl/fl_0.79.50/bin/platforms/libqxcb.so command shows which libraries are needed. The required X11 runtime packages differ from distribution to distribution, eg. for aarch64 ubuntu 18.04.5 the following system packages are used:

• libbsd0
• libc6
• libgl1
• libglvnd0
• libglx0
• libice6
• libsm6
• libuuid1
• libx11-6
• libx11-xcb1
• libxau6
• libxcb-icccm4
• libxcb-image0
• libxcb-keysyms1
• libxcb-randr0
• libxcb-render-util0
• libxcb-render0
• libxcb-shape0
• libxcb-shm0
• libxcb-sync1
• libxcb-util1
• libxcb-xfixes0
• libxcb-xinerama0
• libxcb-xkb1
• libxcb1
• libxdmcp6
• libxext6
• libxkbcommon-x11-0
• libxkbcommon0

Check whether you have all these packages installed.

Installation:

Just unpack the archive. The command-line and graphical interfaces are separated into two executables on all platforms. The CMD executable can be started from a terminal/console, while the GUI executable can be started by (double)clicking on it in a file manager.

Documentation:

FL is almost 100% compatible with IDL 8.0. IDL documentation is available on the net at Harris Geospatial Solutions.

IDL programs

Small IDL programs I find useful: pro

Contact:

Questions, comments, bug reports can be sent to: FawltyLanguage a_t gmail d_o_t com or you can report bugs in the BitBucket issue tracker.

Enjoy!

Lajos Földy

Last modified: 2024/January/21.