CMakeLists: Specify -Wextra on linux builds

Allows reporting more cases where logic errors may exist, such as
implicit fallthrough cases, etc.

We currently ignore unused parameters, since we currently have many
cases where this is intentional (virtual interfaces).

While we're at it, we can also tidy up any existing code that causes
warnings. This also uncovered a few bugs as well.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/video_core/texture_cache/texture_cache.h b/src/video_core/texture_cache/texture_cache.h
index 4edd4313b..47881d527 100644
--- a/src/video_core/texture_cache/texture_cache.h
+++ b/src/video_core/texture_cache/texture_cache.h
@@ -647,7 +647,8 @@ private:
                     break;
                 }
                 const u32 offset = static_cast<u32>(surface->GetCpuAddr() - cpu_addr);
-                const auto [x, y, z] = params.GetBlockOffsetXYZ(offset);
+                const auto offsets = params.GetBlockOffsetXYZ(offset);
+                const auto z = std::get<2>(offsets);
                 modified |= surface->IsModified();
                 const CopyParams copy_params(0, 0, 0, 0, 0, z, 0, 0, params.width, params.height,
                                              1);