Add aarch32 extra build flags and aarch32 machine flags to generic
machine args.
Also modify how arm flags are updated in meson build - for 32-bit build,
update only if cross-compiling.

Signed-off-by: Juraj Linkeš <juraj.lin...@pantheon.tech>
Acked-by: Ruifeng Wang <ruifeng.w...@arm.com>
---
 config/arm/meson.build | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

diff --git a/config/arm/meson.build b/config/arm/meson.build
index 18b820d53e..f4e550ad01 100644
--- a/config/arm/meson.build
+++ b/config/arm/meson.build
@@ -69,7 +69,15 @@ part_number_config_arm = {
                        ['RTE_MAX_LCORE', 64],
                        ['RTE_MAX_NUMA_NODES', 1]
                ]
-       }
+       },
+       'aarch32': {
+               'machine_args': ['-march=armv8-a',
+                                '-mfpu=neon'],
+               'flags': [
+                       ['RTE_ARCH_ARM_NEON_MEMCPY', false],
+                       ['RTE_ARCH_STRICT_ALIGN', true],
+                       ['RTE_ARCH_ARMv8_AARCH32', true]
+               ]}
 }
 implementer_arm = {
        'description': 'Arm',
@@ -348,14 +356,25 @@ socs = {
 dpdk_conf.set('RTE_ARCH_ARM', 1)
 dpdk_conf.set('RTE_FORCE_INTRINSICS', 1)
 
+update_flags = false
+soc_flags = []
 if dpdk_conf.get('RTE_ARCH_32')
-       # armv7 build
+       # 32-bit build
        dpdk_conf.set('RTE_CACHE_LINE_SIZE', 64)
-       dpdk_conf.set('RTE_ARCH_ARMv7', 1)
-       # the minimum architecture supported, armv7-a, needs the following,
-       machine_args += '-mfpu=neon'
+       if meson.is_cross_build()
+               update_flags = true
+               implementer_id = meson.get_cross_property('implementer_id')
+               part_number = meson.get_cross_property('part_number')
+               flags_common = []
+       else
+               # armv7 build
+               dpdk_conf.set('RTE_ARCH_ARMv7', true)
+               # the minimum architecture supported, armv7-a, needs the 
following,
+               machine_args += '-mfpu=neon'
+       endif
 else
        # aarch64 build
+       update_flags = true
        soc = get_option('platform')
        soc_config = {}
        if not meson.is_cross_build()
@@ -393,7 +412,6 @@ else
                soc_config = socs.get(soc, {'not_supported': true})
        endif
 
-       soc_flags = []
        if soc_config.has_key('not_supported')
                error('SoC @0@ not supported.'.format(soc))
        elif soc_config != {}
@@ -408,7 +426,9 @@ else
                disable_drivers += ',' + soc_config.get('disable_drivers', '')
                enable_drivers += ',' + soc_config.get('enable_drivers', '')
        endif
+endif
 
+if update_flags
        if implementers.has_key(implementer_id)
                implementer_config = implementers[implementer_id]
        else
-- 
2.20.1

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