kou commented on issue #37107:
URL: https://github.com/apache/arrow/issues/37107#issuecomment-1674016192
Does this work?
```diff
diff --git a/cpp/src/arrow/util/ree_util.h b/cpp/src/arrow/util/ree_util.h
index 5a240240b..a3d3d16c0 100644
--- a/cpp/src/arrow/util/ree_util.h
+++ b/cpp/src/arrow/util/ree_util.h
@@ -104,6 +104,11 @@ 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);
+ // GH-37107: This is a workaround for GCC 7. GCC 7 doesn't ignore
+ // variables in structured binding automatically from unused
+ // variables when one of these variables are used.
+ // See also: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81767
+ ARROW_UNUSED(_);
return physical_length;
}
```
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