Allow a "default" environment for the apple_sdk_name function instead of a blank one #1605
+18
−10
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The CARGO_CFG_TARGET_ENV variable, as stated here:
https://doc.rust-lang.org/reference/conditional-compilation.html#target_env
Is only specified for disambiguation, meaning that some platforms specify it themselves to values like "gnu" (Nix's buildRustCrate does this). Therefore, to prevent failure when the string is not blank, the default case is allowed.