c0dzilla commented on issue #37107:
URL: https://github.com/apache/arrow/issues/37107#issuecomment-1684091319
Confirmed that this works on g++ 7.3.0:
```
codzilla@hogwarts:~/arrow/cpp/build$ git diff
diff --git a/cpp/src/arrow/util/ree_util.h b/cpp/src/arrow/util/ree_util.h
index 5a24024..c6bb4e5 100644
--- a/cpp/src/arrow/util/ree_util.h
+++ b/cpp/src/arrow/util/ree_util.h
@@ -104,6 +104,7 @@ int64_t FindPhysicalLength(const RunEndCType* run_ends,
int64_t run_ends_size,
int64_t length, int64_t offset) {
auto [_, physical_length] =
FindPhysicalRange<RunEndCType>(run_ends, run_ends_size, length,
offset);
+ ARROW_UNUSED(_);
return physical_length;
}
codzilla@hogwarts:~/arrow/cpp/build$ cmake --build .
Recompacting log...
[91/91] Creating library symlink debug/libarrow.so.1300 debug/libarrow.so
```
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