From: Pavan Nikhilesh <pbhagavat...@marvell.com>
Some ARM CPUs have specific march requirements and
are not compatible with the supported march list.
Add fallback march in case the mcpu and the march
advertised in the part_number_config are not supported
by the compiler.
Example
mcpu = neoverse-n2
march = armv9-a
fallback_march = armv8.5-a
mcpu, march not supported
machine_args = ['-march=armv8.5-a']
mcpu, march, fallback_march not supported
least march supported = armv8-a
machine_args = ['-march=armv8-a']
Signed-off-by: Pavan Nikhilesh <pbhagavat...@marvell.com>
Reviewed-by: Juraj Linkeš <juraj.lin...@pantheon.tech>
---
config/arm/meson.build | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/config/arm/meson.build b/config/arm/meson.build
index 472a30f83a..73557bc169 100644
--- a/config/arm/meson.build
+++ b/config/arm/meson.build
@@ -94,6 +94,7 @@ part_number_config_arm = {
'0xd49': {
'march': 'armv9-a',
'march_features': ['sve2'],
+ 'fallback_march': 'armv8.5-a',
'mcpu': 'neoverse-n2',
'flags': [
['RTE_MACHINE', '"neoverse-n2"'],
@@ -829,6 +830,11 @@ if update_flags
break
endif
endforeach
+ if (part_number_config.has_key('fallback_march') and
+ candidate_march != part_number_config['march'] and
+ cc.has_argument('-march=' +
part_number_config['fallback_march']))
+ candidate_march = part_number_config['fallback_march']
+ endif
endif
if candidate_march != part_number_config['march']
--
2.25.1
