tree 5ae032546848aaf6043d1eab032b9c6225173e6e
parent 46ca461b7ee465c122c5122c8044ef11ec2298bc
author Alex Stewart <alexs.mac@gmail.com> 1572638110 +0000
committer Alex Stewart <alexs.mac@gmail.com> 1572639085 +0000

Detect and disable -fstack-check on macOS 10.15 with Xcode 11

- On macOS 10.15 and Xcode 11 -fstack-check is enabled by default. This
  breaks SIMD alignment (and other alignment) as detailed here:
  https://forums.developer.apple.com/thread/121887 resulting in random
  segfaults from within Eigen.
- The underlying problem also exists with earlier OS versions running
  Xcode 11 if -fstack-check is explicitly enabled.
- This CL explicitly disables -fstack-check on affected versions of
  macOS 10.15 and Xcode 11.

Change-Id: I74d964281c360710d5fb722ac59e6930b0fdcc41