[yaantc]

> Are there targets out there that gcc supports which aren't supported by LLVM? Probably not too many

Plenty in the embedded space. Just compare the GCC backend list at https://gcc.gnu.org/backends.html to what LLVM supports ("only" X86, X86-64, PowerPC, PowerPC-64, ARM, Thumb, SPARC, Alpha, CellSPU, MIPS, MSP430, SystemZ, and XCore).

The embedded space is very diverse, and even if LLVM backend support is good it's still nowhere near GCC. They're pretty niche of course and LLVM does a good job of supporting the mainstream architectures (and even a bit more). Still, if you're in embedded development not being supported by GCC is limiting.

[monocasa]

Yeah. Trunk LLVM doesn't even have AVR support, so no Rustduino.

[untothebreach]

A prominent member of the rust community has been publishing a series on getting rust to target their Uno: http://jakegoulding.com/blog/2016/01/02/rust-on-an-arduino-u...

[wyldfire]

I could be wrong but I'd wager that there's some support for many of those backends that's just not upstreamed to LLVM.

[monocasa]

You can say the same thing for GCC too, it's just that both of the pools (merged into trunk and not) are much larger.

[jdeeny]

If a compiler supports ARM and Thumb, it covers a majority of modern embedded platforms. The days of 8- and 16-bit microcontrollers are coming to an end -- 32-bit Cortex-Mx chips are very competitive on price and power consumption and much more capable.