[all-commits] [llvm/llvm-project] 03142c: [Driver] Correctly handle static C++ standard library

[Petr Hosek via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 03142c5f67788bcc1573f76732d0fccd75c6b965
      https://github.com/llvm/llvm-project/commit/03142c5f67788bcc1573f76732d0fccd75c6b965
  Author: Petr Hosek <phosek at google.com>
  Date:   2021-09-24 (Fri, 24 Sep 2021)

  Changed paths:
    M clang/lib/Driver/ToolChains/Fuchsia.cpp
    M clang/lib/Driver/ToolChains/Gnu.cpp
    M clang/test/Driver/fuchsia.cpp
    M clang/test/Driver/linux-ld.c

  Log Message:
  -----------
  [Driver] Correctly handle static C++ standard library

When statically linking C++ standard library, we shouldn't add -Bdynamic
after including the library on the link line because that might override
user settings like -static and -static-pie. Rather, we should surround
the library with --push-state/--pop-state to make sure that -Bstatic
only applies to C++ standard library and nothing else. This has been
supported since GNU ld 2.25 (2014) so backwards compatibility should
no longer be a concern.

Differential Revision: https://reviews.llvm.org/D110128