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	?	?	?	?	?	❌