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Message-ID: <20171222180832.GD1627@brightrain.aerifal.cx> Date: Fri, 22 Dec 2017 13:08:32 -0500 From: Rich Felker <dalias@...c.org> To: "musl@...ts.openwall.com" <musl@...ts.openwall.com> Subject: Re: Feature request: building musl in a portable way On Fri, Dec 22, 2017 at 06:01:35PM +0000, Nicholas Wilson wrote: > On 22 December 2017 17:49, Rich Felker wrote: > > A bit of a historical note on this: in the late 80s and 90s there was > > an effort called "iBCS" to make a unified ABI for Intel-based unices. > > I believe a common syscall layer was part of it. It was abandoned > > after everybody realized that the Linux syscall ABI _was_, for all > > practical purposes, the unified ABI they wanted. > > That's pretty much where WebAssembly is going too! At the moment, > the WebAssembly "embedding environment" (the webpage) has to provide > a JavaScript implementation of the external dependencies of the > WebAssembly module. > > There is a desire to eventually standardise that a bit - at the > moment it's "whatever Musl wants". I think the conclusion will be > "emulate Linux everywhere". I'm expecting some small tweaks though. > For example, traditionally timezone information is stored in > userland and not available via a syscall: rather than special-case > SYS_open for "/etc/localtime", we might add a Wasm-specific syscall > for doing it. (Naturally, this would all be done in Wasm via an > override in a Wasm-specific directory.) Wouldn't just exporting a TZ variable be easier? Rich
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