Input Files

The Intel® Fortran Compiler interprets the type of each input file by the filename extension; for example, .a, .f, .for, .o, and so on.

Filename	Interpretation	Action
filename.a	object library	Passed to ld.
filename.f	Fortran source	Compiled by Intel® Fortran Compiler, assumes fixed-form source.
filename.ftn	Fortran source	Compiled by Intel Fortran Compiler; assumes fixed form source.
filename.for	Fortran source	Compiled by Intel Fortran Compiler; assumes fixed form source.
filename.fpp	Fortran fixed-form source	Preprocessed by the Intel Fortran preprocessor fpp; then compiled by the Intel Fortran Compiler.
filename.f90	Fortran 90/95 source	Compiled by Intel Fortran Compiler; free-form source.
filename.F	Fortran fixed-form source	Passed to preprocessor (fpp) and then compiled by the Intel Fortran compiler
filename.s	IA-32 assembly file	Passed to the assembler.
filename.s	Itanium(TM) assembly file	Passed to the Intel Itanium assembler.
filename.o	Compiled object module	Passed to ld(1).

You can use the compiler configuration file ifc.cfg for IA-32 or efc.cfg for Itanium-based applications to specify default directories for input libraries and for work files. To specify additional directories for input files, temporary files, libraries, and for the assembler and the linker, use compiler options that specify output file and directory names.