Understanding File Extensions

Input File Extensions

The Intel® C++ Compiler recognizes input files with the extensions listed in the following table:

File Name	Interpretation	Action
file.c	C source file	Passed to compiler
file.C file.CC file.cc file.cpp file.cxx	C++ source file	Passed to compiler
file.a file.so	Library file	Passed to linker
file.i	Preprocessed file	Passed to stdout
file.o	Object file	Passed to linker
file.s	Assembly file	Passed to assembler

The Intel® C++ Compiler produces output files with the extensions listed in the following table:

File Name	Description
file.i	Preprocessed file -- produced with the -P option.
file.o	Object file -- produced with the -c option.
file.s	Assembly language file -- produced with the -S option.
a.out	Executable file -- produced by default compilation.