[dpdk-dev] [PATCH 5/6] mk: add toolchain for clang and linuxapp target

[Bruce Richardson <bruce.richardson@intel.com>]

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Add support for clang by adding a toolchain folder for it with the
appropriate files.
Add compilation support for clang on linux by adding a new target.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 config/defconfig_x86_64-native-linuxapp-clang | 63 ++++++++++++++++++++++
 mk/toolchain/clang/rte.toolchain-compat.mk    | 43 +++++++++++++++
 mk/toolchain/clang/rte.vars.mk                | 77 +++++++++++++++++++++++++++
 3 files changed, 183 insertions(+)
 create mode 100644 config/defconfig_x86_64-native-linuxapp-clang
 create mode 100644 mk/toolchain/clang/rte.toolchain-compat.mk
 create mode 100644 mk/toolchain/clang/rte.vars.mk

diff --git a/config/defconfig_x86_64-native-linuxapp-clang b/config/defconfig_x86_64-native-linuxapp-clang
new file mode 100644
index 0000000..31f2aa4
--- /dev/null
+++ b/config/defconfig_x86_64-native-linuxapp-clang
@@ -0,0 +1,63 @@
+#   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
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * 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
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+#include "common_linuxapp"
+
+#
+# machine can define specific variables or action for a specific board
+# RTE_MACHINE can be:
+# default  nothing specific
+# native   current machine
+# atm      Intel® Atom™ microarchitecture
+# nhm      Intel® microarchitecture code name Nehalem
+# wsm      Intel® microarchitecture code name Westmere
+# snb      Intel® microarchitecture code name Sandy Bridge
+# ivb      Intel® microarchitecture code name Ivy Bridge
+#
+# Note: if your compiler does not support the relevant -march options,
+# it will be compiled with whatever latest processor the compiler supports!
+#
+CONFIG_RTE_MACHINE="native"
+
+#
+# define the architecture we compile for.
+# CONFIG_RTE_ARCH can be i686, x86_64, x86_64_32
+#
+CONFIG_RTE_ARCH="x86_64"
+CONFIG_RTE_ARCH_X86_64=y
+
+#
+# The compiler we use.
+# Can be gcc or icc.
+#
+CONFIG_RTE_TOOLCHAIN="clang"
+CONFIG_RTE_TOOLCHAIN_CLANG=y
diff --git a/mk/toolchain/clang/rte.toolchain-compat.mk b/mk/toolchain/clang/rte.toolchain-compat.mk
new file mode 100644
index 0000000..862b7df
--- /dev/null
+++ b/mk/toolchain/clang/rte.toolchain-compat.mk
@@ -0,0 +1,43 @@
+#   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
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * 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
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#
+# CPUID-related options
+#
+# This was added to support compiler versions which might not support all the
+# flags we need
+#
+
+#find out CLANG version
+
+CLANG_MAJOR_VERSION = $(shell $(CC) -dumpversion | cut -f1 -d.)
+
+CLANG_MINOR_VERSION = $(shell $(CC) -dumpversion | cut -f2 -d.)
diff --git a/mk/toolchain/clang/rte.vars.mk b/mk/toolchain/clang/rte.vars.mk
new file mode 100644
index 0000000..d4e6862
--- /dev/null
+++ b/mk/toolchain/clang/rte.vars.mk
@@ -0,0 +1,77 @@
+#   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
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * 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
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#
+# toolchain:
+#
+#   - define CC, LD, AR, AS, ... (overriden by cmdline value)
+#   - define TOOLCHAIN_CFLAGS variable (overriden by cmdline value)
+#   - define TOOLCHAIN_LDFLAGS variable (overriden by cmdline value)
+#   - define TOOLCHAIN_ASFLAGS variable (overriden by cmdline value)
+#
+# examples for RTE_TOOLCHAIN: gcc, icc
+#
+
+ifeq ($(KERNELRELEASE),)
+CC        = $(CROSS)clang
+else
+CC        = $(CROSS)gcc
+endif
+CPP       = $(CROSS)cpp
+# for now, we don't use as but nasm.
+# AS      = $(CROSS)as
+AS        = nasm
+AR        = $(CROSS)ar
+LD        = $(CROSS)ld
+OBJCOPY   = $(CROSS)objcopy
+OBJDUMP   = $(CROSS)objdump
+STRIP     = $(CROSS)strip
+READELF   = $(CROSS)readelf
+GCOV      = $(CROSS)gcov
+
+HOSTCC    = clang
+HOSTAS    = as
+
+TOOLCHAIN_ASFLAGS =
+TOOLCHAIN_CFLAGS =
+TOOLCHAIN_LDFLAGS =
+
+WERROR_FLAGS := -W -Wall -Werror -Wstrict-prototypes -Wmissing-prototypes
+WERROR_FLAGS += -Wmissing-declarations -Wold-style-definition -Wpointer-arith
+WERROR_FLAGS += -Wnested-externs -Wcast-qual
+WERROR_FLAGS += -Wformat-nonliteral -Wformat-security
+WERROR_FLAGS += -Wundef -Wwrite-strings
+
+# process cpu flags
+include $(RTE_SDK)/mk/toolchain/$(RTE_TOOLCHAIN)/rte.toolchain-compat.mk
+
+export CC AS AR LD OBJCOPY OBJDUMP STRIP READELF
+export TOOLCHAIN_CFLAGS TOOLCHAIN_LDFLAGS TOOLCHAIN_ASFLAGS
-- 
1.9.3