# Compatibility Options

This section contains descriptions for compiler options that pertain to language compatibility.

Parent topic: Compiler Options

- f66
  Tells the compiler to apply FORTRAN 66 semantics.
- f77rtl
  Tells the compiler to use the run-time behavior of FORTRAN 77.
- fpscomp
  Controls whether certain aspects of the run-time system and semantic language features within the compiler are compatible with Intel® Fortran or Microsoft* Fortran PowerStation.
- gcc-name
  Lets you specify the name of the GCC compiler that should be used to set up the link-time environment, including the location of standard libraries.
- gxx-name
  Lets you specify the name of the g++ compiler that should be used to set up the link-time environment, including the location of standard libraries.
- Qvc
  Specifies which version of Microsoft Visual C++* (MSVC) or Microsoft Visual Studio* that the compiler should link to.This feature is only available for ifort.
- vms
  Causes the run-time system to behave like HP* Fortran on OpenVMS* Alpha systems and VAX* systems (VAX FORTRAN*).