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armv8 AArch64 does not require -mfpu=neon

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-mpfu is not required on AArch64 / armv8 architecture on Linux and throws an error if present.
This PR has been tested on gcc and clang on Gentoo-64 and Raspian-64 on a Raspberry Pi 4,
as well as with a cross from Ubuntu
(`make clean && make -j build ARCH=armv8         COMP=gcc COMPILER=aarch64-linux-gnu-g++`)

fixes https://github.com/official-stockfish/Stockfish/issues/3056
closes https://github.com/official-stockfish/Stockfish/pull/3059

No functional change
This commit is contained in:
George Sobala 2020-08-24 06:37:42 +01:00 • committed by Joost VandeVondele
parent d5f86b6359
commit e453f09f06
1 changed files with 7 additions and 5 deletions
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12
src/Makefile
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@ -241,7 +241,7 @@ ifeq ($(ARCH),armv7-neon)
endif endif
ifeq ($(ARCH),armv8) ifeq ($(ARCH),armv8)
arch = armv8-a arch = armv8
prefetch = yes prefetch = yes
popcnt = yes popcnt = yes
neon = yes neon = yes
@ -285,7 +285,7 @@ ifeq ($(COMP),gcc)
CXX=g++ CXX=g++
CXXFLAGS += -pedantic -Wextra -Wshadow CXXFLAGS += -pedantic -Wextra -Wshadow
ifeq ($(arch),$(filter $(arch),armv7 armv8-a)) ifeq ($(arch),$(filter $(arch),armv7 armv8))
ifeq ($(OS),Android) ifeq ($(OS),Android)
CXXFLAGS += -m$(bits) CXXFLAGS += -m$(bits)
LDFLAGS += -m$(bits) LDFLAGS += -m$(bits)
@ -387,7 +387,7 @@ ifeq ($(COMP),ndk)
CXXFLAGS += -mthumb -march=armv7-a -mfloat-abi=softfp -mfpu=neon CXXFLAGS += -mthumb -march=armv7-a -mfloat-abi=softfp -mfpu=neon
STRIP=arm-linux-androideabi-strip STRIP=arm-linux-androideabi-strip
endif endif
ifeq ($(arch),armv8-a) ifeq ($(arch),armv8)
comp=aarch64-linux-android21-clang comp=aarch64-linux-android21-clang
CXX=aarch64-linux-android21-clang++ CXX=aarch64-linux-android21-clang++
STRIP=aarch64-linux-android-strip STRIP=aarch64-linux-android-strip
@ -476,7 +476,7 @@ endif
### 3.6 popcnt ### 3.6 popcnt
ifeq ($(popcnt),yes) ifeq ($(popcnt),yes)
ifeq ($(arch),$(filter $(arch),ppc64 armv7 armv8-a arm64)) ifeq ($(arch),$(filter $(arch),ppc64 armv7 armv8 arm64))
CXXFLAGS += -DUSE_POPCNT CXXFLAGS += -DUSE_POPCNT
else ifeq ($(comp),icc) else ifeq ($(comp),icc)
CXXFLAGS += -msse3 -DUSE_POPCNT CXXFLAGS += -msse3 -DUSE_POPCNT
@ -539,9 +539,11 @@ ifeq ($(neon),yes)
CXXFLAGS += -DUSE_NEON CXXFLAGS += -DUSE_NEON
ifeq ($(KERNEL),Linux) ifeq ($(KERNEL),Linux)
ifneq ($(COMP),ndk) ifneq ($(COMP),ndk)
ifneq ($(arch),armv8)
CXXFLAGS += -mfpu=neon CXXFLAGS += -mfpu=neon
endif endif
endif endif
endif
endif endif
### 3.7 pext ### 3.7 pext
@ -780,7 +782,7 @@ config-sanity:
@test "$(optimize)" = "yes" || test "$(optimize)" = "no" @test "$(optimize)" = "yes" || test "$(optimize)" = "no"
@test "$(arch)" = "any" || test "$(arch)" = "x86_64" || test "$(arch)" = "i386" || \ @test "$(arch)" = "any" || test "$(arch)" = "x86_64" || test "$(arch)" = "i386" || \
test "$(arch)" = "ppc64" || test "$(arch)" = "ppc" || \ test "$(arch)" = "ppc64" || test "$(arch)" = "ppc" || \
test "$(arch)" = "armv7" || test "$(arch)" = "armv8-a" || test "$(arch)" = "arm64" test "$(arch)" = "armv7" || test "$(arch)" = "armv8" || test "$(arch)" = "arm64"
@test "$(bits)" = "32" || test "$(bits)" = "64" @test "$(bits)" = "32" || test "$(bits)" = "64"
@test "$(prefetch)" = "yes" || test "$(prefetch)" = "no" @test "$(prefetch)" = "yes" || test "$(prefetch)" = "no"
@test "$(popcnt)" = "yes" || test "$(popcnt)" = "no" @test "$(popcnt)" = "yes" || test "$(popcnt)" = "no"