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mk: disable gcc AVX512F support

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This is a workaround to prevent a crash, which might be caused by
optimization of newer gcc (7.3.0) on Intel Skylake.

This disables AVX512F support of gcc by adding -mno-avx512f if it is
disabled in DPDK (CONFIG_RTE_ENABLE_AVX512=n).

This does not apply to the meson build as that doesn't have such an option
but always enable AVX512F whenever supported.

Bugzilla ID: 97
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
This commit is contained in:
Yongseok Koh 2018-11-03 01:06:32 +00:00 committed by Thomas Monjalon
parent c12ade20c2
commit 8d07c82b23
1 changed files with 5 additions and 0 deletions
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5
mk/rte.cpuflags.mk
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@ -68,6 +68,11 @@ endif
ifneq ($(filter $(AUTO_CPUFLAGS),__AVX512F__),)
ifeq ($(CONFIG_RTE_ENABLE_AVX512),y)
CPUFLAGS += AVX512F
else
# disable AVX512F support of gcc as a workaround for Bug 97
ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
MACHINE_CFLAGS += -mno-avx512f
endif
endif
endif