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11.1 OpenMP Context Selectors ¶

vendor is always gnu. References are to the GCC manual.

arch	kind	isa
x86, x86_64, i386, i486, i586, i686, ia32	host	See -m... flags in “x86 Options” (without -m)
amdgcn, gcn	gpu	See -march= in “AMD GCN Options”5
nvptx	gpu	See -march= in “Nvidia PTX Options”