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| Family | Language | Command | |
|---|---|---|---|
| GNU | C | gcc | |
| C++ | g++ | ||
| Fortran 77/90 | gfortran | ||
| INTEL | C | icc | |
| C++ | icpc | ||
| Fortran 77/90 | ifort | CRAYC | craycc (through cc) |
| C++ | crayCC (through CC) | ||
| Fortran 77/90 | crayftn (through ftn) | ||
| AMD AOCC | C | clang | |
| C++ | clang++ | ||
| Fortran | flang | ||
| NVIDIA | C | pgcc | |
| C++ | pgCC | ||
| Fortran 77 | pgf77 | ||
| Fortran 90 | pgf90 |
Basic flags
| GNU | INTEL | CRAY | AMD | NVIDIA | Description | -c|
|---|---|---|---|---|---|---|
| -c | -c | -c | -c | Compile or assemble the source files, but do not link. | ||
| -o filename | -o filename | -o filename | -o filename | -o filename | Name the output file filename. | -On|
| -On | -On | -On | -On | Set the optimisation level to n. |
Preprocessor flags
| GNU | INTELCRAY | AMD | NVIDIA | Description | -Dname|
|---|---|---|---|---|---|
| -Dname | -Dname | -Dname | -Dname | Predefine name as a macro for the preprocessor. | -E|
| -E | -E | -E | -E | Preprocessed source files including #line directives are output to stdout. | |
| -I dir | -I dir | -I dir | -I dir | -I dir | Specifies an additional directory dir to search for include files. |
| -J dir | - | - | -module-dir | -module dir | Save/search for module files in directory dir (Fortran only). |
Precision flags
| GNU | INTEL | CRAY | AMD | NVIDIA | Description |
|---|---|---|---|---|---|
| -fdefault-integer-8 | -i8-s integer64 | -fdefault-integer-8 | -i8 | Specifies the default size for integer variables to be 8 bytes. | |
| -fdefault-real-8 | -r8 | -s real64 | -fdefault-real-8 | -r8 | Specifies the default size for real variables to be 8 bytes. |
| -fdefault-double-8 | -double-size 64 | -s real64-fdefault-double-8 | -r8 | Specifies the default size for double variables to be 8 bytes. |
Debug flags
| GNU | INTELCRAY | AMD | NVIDIA | Description | -g|
|---|---|---|---|---|---|
| -g | -g | -g | -g | Produces symbolic debug information.-pg | |
| -pg | -pg | -pg | -pg | Generate extra code to write profile information suitable for the analysis program gprof. | |
| -fcheck=bounds | -check bounds | -R b | -fcheck=bounds | -Mbounds | Add runtime array bounds checking for Fortran. |
| -Wuninitialized | -check uninit | --Wuninitialized | - | Check for uninitialized variables. | |
| -ffpe-trap=zero,invalid,overflow | -fpe-all=0 | - | K trap=fp-ffpe-trap=zero,invalid,overflow | -Ktrap=fp | Trap floating point exceptions:
|
| -fbacktrace | -traceback | --fbacktrace | -Meh_frame | Add debug information for runtime traceback. | |
| -fconvert=swap | -convert big_endian | -hbyteswapio-fconvert=swap | -byteswapio | Specify the representation of data for unformatted files. | |
| -ffree-line-length-132 | -extend-source | 132-N132 | -ffree-line-length-132 | -Mextend | Allow 132 characters source line lengths (in fixed format). |