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Remove the requirement that the jobserver "fifo" is actually a named pipe. Named pipes are essentially stateless, and therefore carry a high risk of a killed process leaving the server with no tokens left, and no clear way to reclaim them. Therefore, multiple jobserver implementations use FUSE instead: - [nixos-jobserver](https://github.com/NixOS/nixpkgs/pull/314888) (WIP) uses simple file on FUSE - [steve](https://gitweb.gentoo.org/proj/steve.git) uses a character device via CUSE - [guildmaster](https://codeberg.org/amonakov/guildmaster) uses a character device via CUSE This is compatible with GNU make and Ninja, since they do not check the file type, and seems to be the only solution that can achieve state tracking while preserving compatibility. CC @amonakov --------- Signed-off-by: Michał Górny <mgorny@gentoo.org>
llvm/lib/Support/Unix README =========================== This directory provides implementations of the lib/System classes that are common to two or more variants of UNIX. For example, the directory structure underneath this directory could look like this: Unix - only code that is truly generic to all UNIX platforms Posix - code that is specific to Posix variants of UNIX SUS - code that is specific to the Single Unix Specification SysV - code that is specific to System V variants of UNIX As a rule, only those directories actually needing to be created should be created. Also, further subdirectories could be created to reflect versions of the various standards. For example, under SUS there could be v1, v2, and v3 subdirectories to reflect the three major versions of SUS.