Support Intel icpx compiler

fktn-k commented 3 months ago

This PR adds support of icpx compilers.
Intel compilers use fast floating points by default and (sometimes too aggressively) warn against the usages of nans and infinities.
fkYAML, however, uses nans and infinities to manage YAML node values.
So, in building the unit test app, -fp-model=precise is used as a workaround.

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