Unable to utilize multiple cpu cores on Linux/amd64

[jfcg]

On Manjaro Linux (intel i5 64-bit cpu, Go 1.16.3, clang 11.1), tinygo (package 0.17.0-1) cannot utilize multiple cpu cores.

runtime.GOMAXPROCS() is empty, GOMAXPROCS env var seems ineffective.

Is there a plan to support concurrency on Linux/amd64?

[aykevl]

Eventually we'll want to support parallelism, yes. It has not been a priority so far as the main supported targets (microcontrollers and WebAssembly) don't really support parallelism and Linux support is mostly there for convenience of testing.

Note that concurrency is fully supported, but as if GOMAXPROCS was forced to 1. That means you can run multiple coroutines, they just won't run at the same time.

[niaow]

Multi-threading support was added by #4559 in v0.38.0.