build: set -mfpu=neon flag for armv7-a with meson

Building on armv7a with meson currenctly fails:

/usr/lib/gcc/arm-linux-gnueabihf/8/include/arm_neon.h:10369:1: error:
    inlining failed in call to always_inline ‘vld1q_s32’: target
    specific option mismatch

Set -mfpu=neon on that architecture like the legacy makefiles do to fix
the issue.

Fixes: b1d48c41189a ("build: support ARM with meson")
Cc: stable@dpdk.org
Signed-off-by: Luca Boccassi <bluca@debian.org>
Acked-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

diff --git a/config/arm/meson.build b/config/arm/meson.build
index 4b23b39..b755138 100644 (file)
--- a/config/arm/meson.build
+++ b/config/arm/meson.build
@@ -89,6 +89,9 @@ if cc.sizeof('void *') != 8
        dpdk_conf.set('RTE_CACHE_LINE_SIZE', 64)
        dpdk_conf.set('RTE_ARCH_ARM', 1)
        dpdk_conf.set('RTE_ARCH_ARMv7', 1)
+       # the minimum architecture supported, armv7-a, needs the following,
+       # mk/machine/armv7a/rte.vars.mk sets it too
+       machine_args += '-mfpu=neon'
 else
        dpdk_conf.set('RTE_CACHE_LINE_SIZE', 128)
        dpdk_conf.set('RTE_ARCH_ARM64', 1)