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Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
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syscall: refactor wasm environment variables and constants #4611

Closed aykevl closed 3 days ago

aykevl commented 4 days ago

Two changes for WebAssembly:

  1. Move environment variables into their own files, and refactor WASIp2 environment variables to be a lot simpler (not going through the C API).
  2. Use the correct constants for -target=wasm. Instead of using fake constants, use the ones that match wasi-libc.

This PR is extracted from #4585 because it's a bit more tricky than it initially seemed.

github-actions[bot] commented 4 days ago

Size difference with the dev branch:

Binary size difference
not the same command!
    tinygo build -size short -o ./build/test.hex -target=feather-rp2040 ./examples/adafruit4650
    go: downloading tinygo.org/x/tinyfont v0.3.0
not the same command!
    tinygo build -size short -o ./build/test.hex -target=nano-rp2040 -stack-size 8kb ./examples/net/websocket/dial/
    go: downloading golang.org/x/net v0.7.0
not the same command!
    tinygo build -size short -o ./build/test.hex -target=nano-rp2040 -stack-size 8kb ./examples/net/mqttclient/natiu/
    go: downloading github.com/soypat/natiu-mqtt v0.5.1
not the same command!
    tinygo build -size short -o ./build/test.hex -target=wioterminal -stack-size 8kb ./examples/net/mqttclient/paho/
    go: downloading github.com/eclipse/paho.mqtt.golang v1.2.0
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  16864   16864      0   0.00%    4324    4324      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-rp2040 ./examples/adafruit4650
  61432   61432      0   0.00%    6196    6196      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/adt7410/main.go
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  11732   11732      0   0.00%    4788    4788      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis3dh/main.go
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