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Clarify the new toolchain conventions revision. #81
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* Bump document version. * Add explanatory content to aid the anticipated transition. * Add a revision history similar to those in the ELF psABI docs. It's unfortunately true that LoongArch specification work *can be* behind the doors at times, as the transparency is *expectedly* lower than that of e.g. RISC-V, but at least we could do better in the wording and make readers less confused about the abrupt change to previous agreed-upon content. Fixes: 55dbaad ("Adjust the Multiarch Specifier")
It's not possible to maintain 100% backwards compatibility so make it clear. Also slightly reword some sentences.
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This is without the commercial reasons (see the linked PR) to hopefully make the change more palatable to the angry mob of unknowing readers. For the record: this is DEFINITELY NOT the full reason behind the closed-door decision. But this is about as close as we community people can get in persuading the depressed ourselves, and about all I can disclose after having multiple private conversations with relevant parties, without inflicting damage to anyone at Loongson or Loongson as a whole (we don't really want to openly criticize Loongson for tweaking a 1-year-old document for primarily commercial reasons, but again it's arguably fair for a privately-controlled ISA to evolve like this). See: loongson#80
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This was referenced Feb 12, 2023
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cc @212dandan @lixing-star @loongson-zn @rex-ms @SixWeining @tianyanhui @wangleiat @yangxiaojuan-loongson @zhuchen1911 (author and approvers of #80)
cc @ChenghuaXu @chenhuacai @FreeFlyingSheep @scylaac @yetist (other Loongson people I remember participated in the original discussions, sorry if I forgot some)
cc @MaskRay @phorcys @Rabenda @xry111 (community stakeholders)
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