mk: require SSE4.2 support on all x86 platforms

[dpdk.git] / mk / machine / native / rte.vars.mk

diff --git a/mk/machine/native/rte.vars.mk b/mk/machine/native/rte.vars.mk
index 0e55b85..f7d98d0 100644 (file)
--- a/mk/machine/native/rte.vars.mk
+++ b/mk/machine/native/rte.vars.mk
@@ -1,12 +1,12 @@
 #   BSD LICENSE
-# 
+#
 #   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 #   All rights reserved.
-# 
+#
 #   Redistribution and use in source and binary forms, with or without
 #   modification, are permitted provided that the following conditions
 #   are met:
-# 
+#
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above copyright
@@ -16,7 +16,7 @@
 #     * Neither the name of Intel Corporation nor the names of its
 #       contributors may be used to endorse or promote products derived
 #       from this software without specific prior written permission.
-# 
+#
 #   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 #   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 #   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -32,16 +32,16 @@
 #
 # machine:
 #
-#   - can define ARCH variable (overriden by cmdline value)
-#   - can define CROSS variable (overriden by cmdline value)
-#   - define MACHINE_CFLAGS variable (overriden by cmdline value)
-#   - define MACHINE_LDFLAGS variable (overriden by cmdline value)
-#   - define MACHINE_ASFLAGS variable (overriden by cmdline value)
-#   - can define CPU_CFLAGS variable (overriden by cmdline value) that
+#   - can define ARCH variable (overridden by cmdline value)
+#   - can define CROSS variable (overridden by cmdline value)
+#   - define MACHINE_CFLAGS variable (overridden by cmdline value)
+#   - define MACHINE_LDFLAGS variable (overridden by cmdline value)
+#   - define MACHINE_ASFLAGS variable (overridden by cmdline value)
+#   - can define CPU_CFLAGS variable (overridden by cmdline value) that
 #     overrides the one defined in arch.
-#   - can define CPU_LDFLAGS variable (overriden by cmdline value) that
+#   - can define CPU_LDFLAGS variable (overridden by cmdline value) that
 #     overrides the one defined in arch.
-#   - can define CPU_ASFLAGS variable (overriden by cmdline value) that
+#   - can define CPU_ASFLAGS variable (overridden by cmdline value) that
 #     overrides the one defined in arch.
 #   - may override any previously defined variable
 #
@@ -56,3 +56,12 @@
 # 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),)
+    MACHINE_CFLAGS = -march=corei7
+endif