[libunwind] Factor out sigreturn check condition. NFC

Create a macro for this instead of duplicating the architecture checks
everywhere. (It's a little redundant to use it when we're checking for a
specific architecture, but I'm also applying it there for consistency.)

Reviewed By: rprichard, MaskRay, #libunwind

Differential Revision: https://reviews.llvm.org/D126342

GitOrigin-RevId: 3d2b5b7b87857b0cc4c322cfc145c46c42fe2bbf
1 file changed
tree: 8c30766ed3b1dbfc49139bb2b83225be8c22b65d
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT