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 either be purchased from our on-line shop or from one of the many authorized worldwide resellers.

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 v7.7! - 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 v7.6 Win 32/64-bit

LF95 Express V7.3 Win 32-bit

Fortran 95 compiler for Windows 32-bit.  The Professional Edition includes the 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!