a5c5b9f767
In openSUSE Tumbleweed (and in any other SUSE distribution which uses (or will use) gcc >= 5), gcc -dumpversion returns '5'. This is on purpose as discussed in https://bugzilla.opensuse.org/show_bug.cgi?id=941428 As a result of which, the gcc-4.x comparison (40 against 5) does not work leading to tons of warnings and failures during build. This patch aims to change the way the gcc version is obtained by using the gcc macros directly. This is similar to what's being used in the Linux kernel. Querying the GCC macros directly gives more accurate results compared to -dumpversion which could vary across distributions. Signed-off-by: Markos Chandras <mchandras@suse.de> Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
93 lines
4.0 KiB
Makefile
93 lines
4.0 KiB
Makefile
# BSD LICENSE
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#
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# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Intel Corporation nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# CPUID-related options
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#
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# This was added to support compiler versions which might not support all the
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# flags we need
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#
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#find out GCC version
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GCC_MAJOR = $(shell echo __GNUC__ | $(CC) -E -x c - | tail -n 1)
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GCC_MINOR = $(shell echo __GNUC_MINOR__ | $(CC) -E -x c - | tail -n 1)
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GCC_VERSION = $(GCC_MAJOR)$(GCC_MINOR)
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# if GCC is older than 4.x
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ifeq ($(shell test $(GCC_VERSION) -lt 40 && echo 1), 1)
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MACHINE_CFLAGS =
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$(warning You are using GCC < 4.x. This is neither supported, nor tested.)
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else
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# GCC graceful degradation
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# GCC 4.2.x - added support for generic target
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# GCC 4.3.x - added support for core2, ssse3, sse4.1, sse4.2
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# GCC 4.4.x - added support for avx, aes, pclmul
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# GCC 4.5.x - added support for atom
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# GCC 4.6.x - added support for corei7, corei7-avx
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# GCC 4.7.x - added support for fsgsbase, rdrnd, f16c, core-avx-i, core-avx2
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# GCC 4.9.x - added support for armv8-a+crc
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#
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ifeq ($(shell test $(GCC_VERSION) -le 49 && echo 1), 1)
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MACHINE_CFLAGS := $(patsubst -march=armv8-a+crc,-march=armv8-a+crc -D__ARM_FEATURE_CRC32=1,$(MACHINE_CFLAGS))
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endif
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ifeq ($(shell test $(GCC_VERSION) -le 47 && echo 1), 1)
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MACHINE_CFLAGS := $(patsubst -march=core-avx-i,-march=corei7-avx,$(MACHINE_CFLAGS))
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MACHINE_CFLAGS := $(patsubst -march=core-avx2,-march=core-avx2,$(MACHINE_CFLAGS))
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endif
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ifeq ($(shell test $(GCC_VERSION) -lt 46 && echo 1), 1)
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MACHINE_CFLAGS := $(patsubst -march=corei7-avx,-march=core2 -maes -mpclmul -mavx,$(MACHINE_CFLAGS))
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MACHINE_CFLAGS := $(patsubst -march=corei7,-march=core2 -maes -mpclmul,$(MACHINE_CFLAGS))
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endif
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ifeq ($(shell test $(GCC_VERSION) -lt 45 && echo 1), 1)
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MACHINE_CFLAGS := $(patsubst -march=atom,-march=core2 -mssse3,$(MACHINE_CFLAGS))
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endif
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ifeq ($(shell test $(GCC_VERSION) -lt 44 && echo 1), 1)
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MACHINE_CFLAGS := $(filter-out -mavx -mpclmul -maes,$(MACHINE_CFLAGS))
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ifneq ($(findstring SSE4_2, $(CPUFLAGS)),)
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MACHINE_CFLAGS += -msse4.2
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endif
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ifneq ($(findstring SSE4_1, $(CPUFLAGS)),)
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MACHINE_CFLAGS += -msse4.1
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endif
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endif
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ifeq ($(shell test $(GCC_VERSION) -lt 43 && echo 1), 1)
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MACHINE_CFLAGS := $(filter-out -msse% -mssse%,$(MACHINE_CFLAGS))
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MACHINE_CFLAGS := $(patsubst -march=core2,-march=generic,$(MACHINE_CFLAGS))
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MACHINE_CFLAGS += -msse3
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endif
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ifeq ($(shell test $(GCC_VERSION) -lt 42 && echo 1), 1)
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MACHINE_CFLAGS := $(filter-out -march% -mtune% -msse%,$(MACHINE_CFLAGS))
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endif
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endif
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