tree 9e401eb60da168e8704a398427110c2feeec2ad2
parent 532770bbb871576ce9726e6129a1ead09ccd0d05
author Nicolas Capens <capn@google.com> 1611255646 -0500
committer Nicolas Capens <nicolascapens@google.com> 1611260924 +0000

Target macOS 10.12 when building LLVM

When enabling C++17, LLVM uses std::shared_mutex instead of its own
implementation. On macOS it requires version 10.12 (Sierra), while
Chrome must still support 10.11. However, we don't need LLVM as Reactor
backend, except for ARM64, but Mac devices with such CPU have a more
recent OS version.

llvm-10.0/llvm/include/llvm/Support/RWMutex.h:100:8: error: 'shared_mutex' is unavailable: introduced in macOS 10.12

Bug: b/174843857
Change-Id: Ie24095aa17d22072cfb9d655b87252cbea5209d0
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/52030
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>