[all-commits] [llvm/llvm-project] 6b7a49: Fix all the CMake code that can only handle -stdli...

[Raphael Isemann via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b7a49bb43d58c2c08fddb9f6c538ee52806de0a
      https://github.com/llvm/llvm-project/commit/6b7a49bb43d58c2c08fddb9f6c538ee52806de0a
  Author: Raphael Isemann <teemperor at gmail.com>
  Date:   2020-10-13 (Tue, 13 Oct 2020)

  Changed paths:
    M libcxx/CMakeLists.txt
    M libcxxabi/CMakeLists.txt
    M libunwind/CMakeLists.txt

  Log Message:
  -----------
  Fix all the CMake code that can only handle -stdlib= but not --stdlib=

There are several places in LLVM's CMake setup that try to remove the
`stdlib=...` flag from the CMake flags. All this code however only considered
the `-stdlib=` variant of the flag but not the alternative spelling with a
double dash. This causes that when one adds `--stdlib=...` to the user-provided
CMake flags that this gets transformed into just `-` which ends up causing the
build system to think it should read the source from stdin (which then lead to
very confusing build errors).

This just adds the alternative spelling before the`-stdlib=` variant in all
these places

Reviewed By: ldionne

Differential Revision: https://reviews.llvm.org/D87133