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mk: fix detection of SSE4.2 on FreeBSD

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Add a special case to the native target makefile, where we check if
-march=native shows SSE4.2 support. If it does not, then not everything may
build, so we check if the hardware supports SSE4.2, and use a corei7 target
explicitly to get the SSE4.2 support.

Then ACL library, which requires SSE4.2, can be re-enabled for FreeBSD.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Tested-by: Zhaochen Zhan <zhaochen.zhan@intel.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
This commit is contained in:
Bruce Richardson 2014-07-08 00:36:56 +01:00 committed by Thomas Monjalon
parent bc9b2c694f
commit bda2ae1102
2 changed files with 12 additions and 5 deletions
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5
config/defconfig_x86_64-native-bsdapp-gcc
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@ -69,8 +69,3 @@ CONFIG_RTE_ARCH_X86_64=y
#
CONFIG_RTE_TOOLCHAIN="gcc"
CONFIG_RTE_TOOLCHAIN_GCC=y
#
# GCC doesn't detect SSE4.x support correctly on BSD, so disable ACL lib
#
CONFIG_RTE_LIBRTE_ACL=n

12
mk/machine/native/rte.vars.mk
View File

@ -56,3 +56,15 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS = -march=native
# On FreeBSD systems, sometimes the correct CPU type is not picked up.
# To get everything to compile, we need SSE4.2 support, so check if that is
# reported by compiler. If not, check if the CPU actually supports it, and if
# so, set the compilation target to be a corei7, minimum target with SSE4.2.
SSE42_SUPPORT=$(shell $(CC) -march=native -dM -E - </dev/null | grep SSE4_2)
ifeq ($(SSE42_SUPPORT),)
CPU_SSE42_SUPPORT = $(shell grep SSE4\.2 /var/run/dmesg.boot 2>/dev/null)
ifneq ($(CPU_SSE42_SUPPORT),)
MACHINE_CFLAGS = -march=corei7
endif
endif