Programs for Programmers

Lahey/GNU Lahey/Fujitsu Fortran Compilers

Polyhedron has had a long relationship with Lahey offering local sales and support of its compilers for over many years.  The compilers are available in a variety of configurations for Windows 32-bit, Linux 32-bit and Linux 64-bit, and recently the Lahey GNU 32/64-bit Windows compiler. They can be purchased from our on-line shop

Lahey's Linux compilers are no longer under development or supported, so we recommend that you try before you buy.


To check the O/S compatibility status of current and previous Lahey Windows compilers, click here.

Lahey/GNU Fortran - Silverthrone Edition for 32 & 64 bit Windows Full Fortran 95/90/77 compliance with extensive support for the Fortran 2003 and 2008 standards; targets 32 and 64-bit Windows. Includes the automatic-parallelizing GFortran compiler, Visual Studio 2015 Shell, Lahey's Exclusive Visual Studio Fortran support, Winteracter WiSK Graphics package, and more!

Lahey announces Lahey/Fujitsu Fortran95 Professional v7.8! - Compatibility with Visual Studio 2015 - Shipping now!

Lahey Computer Systems, Inc.

Lahey Computer Systems, Inc.Fujitsu Ltd.


LGF - Lahey GNU Fortran Lahey/GNU Fortran - Silverthrone Edition for 32 & 64 bit Windows

LF95 Pro Fortran v7.8 Win 32/64-bit

LF95 Express V7.3 Win 32-bit

Fortran 95 compiler for Windows 32-bit.  The Professional Edition includes the original Lahey Fortran compiler v7.8 (for 32 bit) and Lahey GNU compiler which is 32/64 bit.
The products below are still available but are no longer under development and are not supported.
LF90 Fortran 4.5 Win 32-bit Fortran 90 compiler for Windows 32-bit
LF95 VS2005/VS2008 Integration Optional integration package to integrate LF Fortran v7.1 with VS2005 or VS2008
Included with LF V7.2 and above!