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GCC and File Extensions
| Extension | Meaning |
|---|---|
.h |
C header file (not to be compiled or linked). | .c |
C source code which must be preprocessed. | .i |
C source code which should not be preprocessed. | .ii |
C++ source code which should not be preprocessed. | .cc, .cp, .cxx,
.cpp, .c++, .C
| C++ source code which must be preprocessed. | .f, .for, .FOR |
Fortran source code which should not be preprocessed. | .F, .fpp, .FPP |
Fortran source code which must be preprocessed (with the traditional preprocessor). | .r |
Fortran source code which must be preprocessed with a RATFOR preprocessor (not included with GCC). | .s |
Assembler code. | .S |
Assembler code which must be preprocessed. | other | An object file to be fed straight into linking. Any file name with no recognized suffix is treated this way. |
An alternative is to use the -x option of GCC to specify
the language of input files explicitly.
-x none is the same as the default behaviour, and causes
files to be handled according to their extension.
Other options include -x c, -x c++, and
-x f77.
Yet another alternative is to use
g++ and g77.
These programs invoke gcc with appropriate options for
C++ and Fortran.
