Cargo Features

intel_tex_2 has no features set by default.

intel_tex_2 = { version = "0.3.0", features = ["ispc"] }
ispc = cc, ispc_compile

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

cc build ispc?
ispc_compile build ispc?