config/ppc: ignore gcc 11 psabi warnings
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Commit Message
Suppress the gcc warning "note: the layout of aggregates containing
vectors with 4-byte alignment has changed in GCC 5" on POWER systems
by setting "-Wno-psabi". Warning was originally added to gcc in
commit https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=9832651 to warn
of the vector alignment changes introduced in GCC 5. Older gcc
versions forced vector alignment to 16 bytes due to requirements for
POWER 6 and earlier CPUs, but these restrictions don't apply to CPUs
supported by DPDK.
Bugzilla ID: 739
Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
---
config/ppc/meson.build | 6 ++++++
1 file changed, 6 insertions(+)
@@ -17,6 +17,12 @@ if not power9_supported
dpdk_conf.set('RTE_MACHINE','power8')
endif
+# Suppress the gcc warning "note: the layout of aggregates containing
+# vectors with 4-byte alignment has changed in GCC 5".
+if cc.get_id() == 'gcc' and cc.version().version_compare('>=10.0') and cc.version().version_compare('<12.0') and cc.has_argument('-Wno-psabi')
+ add_project_arguments('-Wno-psabi', language: 'c')
+endif
+
# Certain POWER9 systems can scale as high as 1536 LCORES, but setting such a
# high value can waste memory, cause timeouts in time limited autotests, and is
# unlikely to be used in many production situations. Similarly, keeping the