[dpdk-dev] [PATCH 01/18] mk: require SSE4.2 support on all x86 platforms

[Bruce Richardson]

Increase the default baseline from "core2" architecture to "corei7". This
means that all builds will have SSE4.2 support included, and we can remove
special case manipulation of CFLAGS for the same. Naturally, this does mean
that some machines that previously could run DPDK now can't do so, but
hardware with SSE4.2 has been around for almost a decade now, so this
should not be a major problem.

Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
---
 mk/machine/default/rte.vars.mk           | 2 +-
 mk/machine/native/rte.vars.mk            | 3 ---
 mk/toolchain/icc/rte.toolchain-compat.mk | 2 +-
 3 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/mk/machine/default/rte.vars.mk b/mk/machine/default/rte.vars.mk
index a6fb842..71a25bc 100644
--- a/mk/machine/default/rte.vars.mk
+++ b/mk/machine/default/rte.vars.mk
@@ -55,4 +55,4 @@
 # CPU_LDFLAGS =
 # CPU_ASFLAGS =
 
-MACHINE_CFLAGS += -march=core2
+MACHINE_CFLAGS += -march=corei7
diff --git a/mk/machine/native/rte.vars.mk b/mk/machine/native/rte.vars.mk
index 7f55b54..f7d98d0 100644
--- a/mk/machine/native/rte.vars.mk
+++ b/mk/machine/native/rte.vars.mk
@@ -63,8 +63,5 @@ MACHINE_CFLAGS = -march=native
 # 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
diff --git a/mk/toolchain/icc/rte.toolchain-compat.mk b/mk/toolchain/icc/rte.toolchain-compat.mk
index 88f1ac9..3c25d18 100644
--- a/mk/toolchain/icc/rte.toolchain-compat.mk
+++ b/mk/toolchain/icc/rte.toolchain-compat.mk
@@ -41,7 +41,7 @@
 ICC_MAJOR_VERSION = $(shell icc -dumpversion | cut -f1 -d.)
 
 ifeq ($(shell test $(ICC_MAJOR_VERSION) -lt 12 && echo 1), 1)
-	MACHINE_CFLAGS = -xSSE3
+	MACHINE_CFLAGS = -xSSE4.2
 $(warning You are not using ICC 12.x or higher. This is neither supported, nor tested.)
 
 else
-- 
2.9.4