pitrou commented on code in PR #48166:
URL: https://github.com/apache/arrow/pull/48166#discussion_r2590050580
##########
cpp/src/arrow/ipc/message_internal_test.cc:
##########
@@ -74,6 +76,29 @@ TEST(TestMessageInternal, TestByteIdentical) {
0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x66, 0x30, 0x00, 0x00,
0x08, 0x00,
0x0C, 0x00, 0x08, 0x00, 0x07, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x01,
0x40, 0x00, 0x00, 0x00};
+#else
+ // On Big-endian systems, FlatBuffer serialization can produce slightly
different
+ // output across different platforms and toolchains.
Review Comment:
Ah, then you need a different expected output for each `Endianness`. But I
was suggesting to only test with `Endianness::Little`.
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