Can't compile sixel-sys on windows or macOS (works fine in linux) about sixel-sys HOT 5 OPEN

Found the source of the error. It's a bug with std::proccess::Command.
tldr;
Create a dummy file named configure in the project root directory and everything works.

Actual Explanation:
In the current version of rust (1.49.0 at time of writing) the std::proccess::Command constructor std::process::Command::new takes in a &str as an argument. This argument is then interpreted in a OS dependent way.
On macOS, but not Linux, std::proccess::Command::new will attempt to find the command if it is a relative path. However, this is not the location of the actual command because we use the .current_dir() method to change the current working directory.
So, on macOS, at std::proccess::Command::new the relative path you pass in must be a valid path relative to the working directory of the calling proccess and a valid path relative to the directory passed to .current_dir().

I will create a bug report for the rust standard library, but in the meantime you can fix this with an ease workaround:
Create a dummy file named configure in the project root directory. This way the relative path will be valid in both contexts.

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For future reference here is the rust bug report: rust-lang/rust#80819

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PR for fix:rust-lang/rust#80537

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I haven't touched this in a while, but I'll fix when I have the time.

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I seem to be getting this bug on Archlinux and FreeBSD, even after creating the configure file as it is in mmulet's commit. Am I missing something?

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