tree f892eb40cc3c811cbd95085c28b8a43632eabf34
parent d2b012e3913a56d3cb2d9798bf77dc2599148dfb
author jeremyd2019 <github@jdrake.com> 1746773642 -0700
committer GitHub <noreply@github.com> 1746773642 +0300
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[Clang] [Driver] add a Cygwin ToolChain (#135691)

Add a new Cygwin toolchain that just goes through the motions to
initialize the Generic_GCC base properly. This allows removing some old,
almost certainly wrong hard-coded paths from Lex/InitHeaderSearch.cpp.

MSYS2 (GCC triple (arch)-pc-msys) is a fork of Cygwin (GCC triple
(arch)-pc-cygwin), and this driver can be used for either.

Add a simple test for this driver.