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
`nvptx`	`gpu`	See `-march=` in Nvidia PTX Options