Instead of hardcoding the command line parameters and the environment
variables in the binary, pass them at runtime to Node.js and use the
WASIp1 API to retrieve them in wasm_exec.js.
The only real benefit right now is that it becomes possible to change
`go.argv` and `go.env` before running a wasm binary.
This also changes the syscall package for GOOS=js: it now becomes more
like a libc (using wasi-libc), which means error values like
`syscall.EEXIST` will actually match the one returned by the relevant
libc function.
Wasm binary size for packages that import the os package will be
increased somewhat.
Do it all at once in preparation for Go 1.18 support.
To make this commit, I've simply modified the `fmt-check` Makefile
target to rewrite files instead of listing the differences. So this is a
fully mechanical change, it should not have introduced any errors.
This is mainly useful to be able to run `tinygo test`, for example:
tinygo test -target=cortex-m-qemu -v math
This is not currently supported, but will be in the future.
Ayke van Laethem
deadprogram
Yurii Soldak