fix: prepare build system for Nix

[mkroening]

This PR applies most of @alyssais's patches to make Hermit build with Nix: https://gist.github.com/alyssais/cf9362e46da004cde1cec85e857e01fa

The only thing that I did not apply is disabling build-std for hermit-builtins. RUSTC_BOOTSTRAP should be sufficient to enable build-std.

[github-actions]

Benchmark Results

Details

Benchmark	Current: 4cee2bc	Previous: 2e23902	Performance Ratio
startup_benchmark Build Time	93.78 s	80.34 s	1.17 ❗
startup_benchmark File Size	0.78 MB	0.80 MB	0.98 ❗
Startup Time - 1 core	0.79 s (±0.01 s)	0.75 s (±0.02 s)	1.06 ❗
Startup Time - 2 cores	0.80 s (±0.03 s)	0.74 s (±0.02 s)	1.09 ❗
Startup Time - 4 cores	0.80 s (±0.01 s)	0.74 s (±0.02 s)	1.08 ❗
multithreaded_benchmark Build Time	92.13 s	82.11 s	1.12 ❗
multithreaded_benchmark File Size	0.88 MB	0.86 MB	1.03 ❗
Multithreaded Pi Efficiency - 2 Threads	67.98 % (±5.30 %)	85.89 % (±6.61 %)	0.79 ❗
Multithreaded Pi Efficiency - 4 Threads	41.44 % (±2.84 %)	43.43 % (±2.56 %)	0.95
Multithreaded Pi Efficiency - 8 Threads	20.53 % (±1.63 %)	25.76 % (±1.53 %)	0.80 ❗
micro_benchmarks Build Time	216.04 s	80.40 s	2.69 ❗
micro_benchmarks File Size	0.89 MB	0.86 MB	1.03 ❗
Scheduling time - 1 thread	189.89 ticks (±45.15 ticks)	62.65 ticks (±4.06 ticks)	3.03 ❗
Scheduling time - 2 threads	114.72 ticks (±19.81 ticks)	34.08 ticks (±4.10 ticks)	3.37 ❗
Micro - Time for syscall (getpid)	8.83 ticks (±5.86 ticks)	3.45 ticks (±0.58 ticks)	2.56
Memcpy speed - (built_in) block size 4096	55628.31 MByte/s (±40853.03 MByte/s)	82448.38 MByte/s (±56997.13 MByte/s)	0.67
Memcpy speed - (built_in) block size 1048576	14984.09 MByte/s (±12646.85 MByte/s)	30585.98 MByte/s (±24707.84 MByte/s)	0.49
Memcpy speed - (built_in) block size 16777216	12363.32 MByte/s (±10297.45 MByte/s)	26340.06 MByte/s (±21720.96 MByte/s)	0.47
Memset speed - (built_in) block size 4096	55941.85 MByte/s (±41082.58 MByte/s)	82292.76 MByte/s (±56891.50 MByte/s)	0.68
Memset speed - (built_in) block size 1048576	15248.20 MByte/s (±12769.34 MByte/s)	31323.85 MByte/s (±25145.86 MByte/s)	0.49
Memset speed - (built_in) block size 16777216	12662.03 MByte/s (±10455.49 MByte/s)	27104.68 MByte/s (±22209.94 MByte/s)	0.47
Memcpy speed - (rust) block size 4096	51112.86 MByte/s (±38042.90 MByte/s)	74097.96 MByte/s (±51811.44 MByte/s)	0.69
Memcpy speed - (rust) block size 1048576	14021.92 MByte/s (±11382.93 MByte/s)	30361.60 MByte/s (±24602.37 MByte/s)	0.46
Memcpy speed - (rust) block size 16777216	12005.40 MByte/s (±9898.05 MByte/s)	27625.34 MByte/s (±22806.88 MByte/s)	0.43
Memset speed - (rust) block size 4096	52503.60 MByte/s (±38617.54 MByte/s)	74373.47 MByte/s (±51976.48 MByte/s)	0.71
Memset speed - (rust) block size 1048576	14342.34 MByte/s (±11607.88 MByte/s)	31110.89 MByte/s (±25033.24 MByte/s)	0.46
Memset speed - (rust) block size 16777216	12380.30 MByte/s (±10139.81 MByte/s)	28386.93 MByte/s (±23265.03 MByte/s)	0.44
alloc_benchmarks Build Time	222.57 s	74.76 s	2.98 ❗
alloc_benchmarks File Size	0.86 MB	0.87 MB	0.98 ❗
Allocations - Allocation success	91.35 %	91.31 %	1.00 ❗
Allocations - Deallocation success	100.00 %	100.00 %	1
Allocations - Pre-fail Allocations	61.55 %	61.44 %	1.00 ❗
Allocations - Average Allocation time	17407.91 Ticks (±1305.63 Ticks)	5860.58 Ticks (±98.43 Ticks)	2.97 ❗
Allocations - Average Allocation time (no fail)	18344.19 Ticks (±1619.60 Ticks)	6554.81 Ticks (±92.86 Ticks)	2.80 ❗
Allocations - Average Deallocation time	3375.91 Ticks (±1049.09 Ticks)	1805.01 Ticks (±250.35 Ticks)	1.87 ❗
mutex_benchmark Build Time	212.48 s	79.82 s	2.66 ❗
mutex_benchmark File Size	0.89 MB	0.86 MB	1.03 ❗
Mutex Stress Test Average Time per Iteration - 1 Threads	33.98 ns (±7.20 ns)	12.10 ns (±0.41 ns)	2.81 ❗
Mutex Stress Test Average Time per Iteration - 2 Threads	32.30 ns (±9.85 ns)	40.26 ns (±1.68 ns)	0.80

This comment was automatically generated by workflow using github-action-benchmark.