Introduce embedded development using Swift

Development Compiler
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I've build Swift for RISCV64 and Buildroot. The caveat is that I only was able to compile targeting Soft Float.

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In the previous release, I added flags to the Swift frontend, but I found that there were standard flags later.

Now I use -Xcc -mhard-float, -Xcc -mfloat-abi=hard flags to tell the compiler to generate hard float instruction and ABI. I don't know if this would work in RISCV64.

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I did try that, it was an issue of Clang assuming soft float for Swift when specifying the triple. Wasn't a dealbreaker for me.

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This got me going on a chill Saturday morning. So good

I'm still going to learn C on a fundamental level before trying anything embedded with Swift. Would you agree that it is vital to know where and why Swift came from?

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I'd like to encourage anyone interested in embedded development to check out Embedded Swift, where a vision for a possible first class support for embedded programming is presented.

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Here, I am an embedded EE engineer, interested in working with Swift lang. :)

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Nice!