[PATCH] D134454: [Driver][Distro] Fix ArchLinux triplet and sysroot detection

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added a comment.

I am nervous as well as Arch Linux has many derivatives. They likely don't use `ID=arch` in `/etc/os-release`. The patch won't work for them.

The last few comments of https://discourse.llvm.org/t/rfc-adding-a-default-file-location-to-config-file-support/63606 discuss a generic mechanism solving the distribution difference problem with configuration files.
Also, the new driver option `--gcc-install-dir` (https://discourse.llvm.org/t/add-gcc-install-dir-deprecate-gcc-toolchain-and-remove-gcc-install-prefix/65091 ; milestone: 16.0.0) can be useful for some tasks.


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https://reviews.llvm.org/D134454