When switching from gcc8 to gcc10 on Linux ppc64le, we get dozens of warnings in hotspot like these :

adaptiveSizePolicy.cpp:262:6: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5
bcEscapeAnalyzer.cpp:1267:6: note: the layout of aggregates containing vectors with 4-byte alignment has changed in GCC 5
block.cpp:1415:95: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5

Probably it would make sense to suppress the warning, -Wno-psabi might be an option.
Some info about this :

https://patches.dpdk.org/project/dpdk/patch/20210623161620.49916-1-drc@linux.vnet.ibm.com/

https://stackoverflow.com/questions/52020305/what-exactly-does-gccs-wpsabi-option-do-what-are-the-implications-of-supressi