Compiler support

vendor	Fortran compiler	C compiler	Module output directory	Module include directory	OpenMP	Free for OSS
Gnu	`gfortran`	`gcc`	`-J`	`-I`	`-fopenmp`	✔️
IntelLLVM oneAPI	`ifx`	`icx`	`-module`	`-I`	`-qopenmp`	✔️
NVIDIA	`nvfortran`	`nvc`	`-module`	`-I`	`-mp`	✔️
LLVM flang	`flang`	`clang`	`-module`	`-I`	`-mp`	✔️
LFortran	`lfortran`	---	?	?	?	✔️
Lahey/Fujitsu	`lfc`	?	`-M`	`-I`	`-openmp`	?
NAG	`nagfor`	?	`-mdir`	`-I`	`-openmp`	❌
Cray	`crayftn`	`craycc`	`-J`	`-I`	`-homp`	❌
IBM OpenXL	`xlf`	?	`-qmoddir`	`-I`	`-qsmp`	✔️
Oracle/Sun	?	?	`-moddir=`	`-M`	`-xopenmp`	?
Silverfrost FTN95	`ftn95`	?	?	`/MOD_PATH`	?	?
Elbrus	?	`lcc`	`-J`	`-I`	`-fopenmp`	?
OpenWatcom (F77)	`wfl386`					✔️

Discontinued compilers

Note: Intel legacy (icc, icl, ifort) are discontinued ~ 2023 per Intel. They are replaced by IntelLLVM (icx, ifx).

vendor	Fortran compiler	C compiler	Module output directory	Module include directory	OpenMP	Free for OSS
Intel legacy	`ifort`	`icc`	`-module`	`-I`	`-qopenmp`	✔️
Intel legacy (Windows)	`ifort`	`icl`	`/module:path`	`/I`	`/Qopenmp`	✔️
PGI	`pgfortran`	`pgcc`	`-module`	`-I`	`-mp`	✔️
Hewlett Packard	?	?	?	?	?	❌
Watcom	?	?	?	?	?	❌
PathScale	?	?	`-module`	`-I`	`-mp`	❌
G95	?	?	`-fmod=`	`-I`	`-fopenmp`	✔️
Open64	?	?	`-module`	`-I`	`-mp`	❌
Unisys	?	?	?	?	?	❌