https://developer.arm.com/technologies/compute-library
Zynq向けにARM Compute Libraryをビルドしてみた。
$ git clone git://github.com/ARM-software/ComputeLibrary
$ cd ComputeLibrary
$ sudo apt install scons
$ scons debug=1 neon=1 opencl=0 arch=armv7aそしたら、次のように"ERROR: Compiler not found"になりました。
そりゃ、クロスコンパイラを指定していないからエラーになるわな。
$ scons debug=1 neon=1 opencl=0 arch=armv7a
scons: Reading SConscript files ...
ERROR: Compiler not found
scons: done reading SConscript files.
scons: Building targets ...
scons: building associated VariantDir targets: build
scons: `.' is up to date.
scons: done building targets.archで指定できるのは次の4つである。
armv7a、arm64-v8a、arm64-v8.2-a、x86
だったら、まず、x86版でもビルドしてみよう。
Intel CPUでビルドする場合はx86を指定して次のように実行する。
たぶん、ライブラリを試すようなんだと思う。
% scons debug=1 neon=0 opencl=0 arch=x86ビルドすると次のようにライブラリが出来上がる。
$ ls build/
libarm_compute-static.a libarm_compute_core-static.a src
libarm_compute.so libarm_compute_core.soとりあえず、ヘルプを見る。
$ scons --help
scons: Reading SConscript files ...
ERROR: Compiler not found
scons: done reading SConscript files.
debug: Debug (default=0) (0|1)
default: 0
actual: 0
asserts: Enable asserts (This flag is forced to 1 for debug=1) (default=0) (0|1)
default: 0
actual: 0
arch: Target Architecture (default=armv7a) (armv7a|arm64-v8a|arm64-v8.2-a|x86)
default: armv7a
actual: armv7a
os: Target OS (default=linux) (linux|android|bare_metal)
default: linux
actual: linux
build: Build type: (default=cross_compile) (native|cross_compile)
default: cross_compile
actual: cross_compile
Werror: Enable/disable the -Werror compilation flag (Default=1) (0|1)
default: 1
actual: 1
opencl: Enable OpenCL support(Default=1) (0|1)
default: 1
actual: 1
neon: Enable Neon support(Default=0) (0|1)
default: 0
actual: 0
embed_kernels: Embed OpenCL kernels in library binary(Default=0) (0|1)
default: 0
actual: 0
Use scons -H for help about command-line options.どうも、ヘルプは"-H"だったらしい・・・
$ scons -H
usage: scons [OPTION] [TARGET] ...
SCons Options:
-b, -d, -e, -m, -S, -t, -w, --environment-overrides, --no-keep-going,
--no-print-directory, --print-directory, --stop, --touch
Ignored for compatibility.
-c, --clean, --remove Remove specified targets and dependencies.
-C DIR, --directory=DIR Change to DIR before doing anything.
--cache-debug=FILE Print CacheDir debug info to FILE.
--cache-disable, --no-cache
Do not retrieve built targets from CacheDir.
--cache-force, --cache-populate
Copy already-built targets into the CacheDir.
--cache-readonly Do not update CacheDir with built targets.
--cache-show Print build actions for files from CacheDir.
--config=MODE Controls Configure subsystem: auto, force,
cache.
-D Search up directory tree for SConstruct,
build all Default() targets.
--debug=TYPE Print various types of debugging information:
count, duplicate, explain, findlibs, includes,
memoizer, memory, objects, pdb, prepare,
presub, stacktrace, time.
--diskcheck=TYPE Enable specific on-disk checks.
--duplicate=DUPLICATE Set the preferred duplication methods. Must be
one of hard-soft-copy, soft-hard-copy,
hard-copy, soft-copy, copy
-f FILE, --file=FILE, --makefile=FILE, --sconstruct=FILE
Read FILE as the top-level SConstruct file.
-h, --help Print defined help message, or this one.
-H, --help-options Print this message and exit.
-i, --ignore-errors Ignore errors from build actions.
-I DIR, --include-dir=DIR Search DIR for imported Python modules.
--implicit-cache Cache implicit dependencies
--implicit-deps-changed Ignore cached implicit dependencies.
--implicit-deps-unchanged Ignore changes in implicit dependencies.
--interact, --interactive Run in interactive mode.
-j N, --jobs=N Allow N jobs at once.
-k, --keep-going Keep going when a target can't be made.
--max-drift=N Set maximum system clock drift to N seconds.
--md5-chunksize=N Set chunk-size for MD5 signature computation to
N kilobytes.
-n, --no-exec, --just-print, --dry-run, --recon
Don't build; just print commands.
--no-site-dir Don't search or use the usual site_scons dir.
--profile=FILE Profile SCons and put results in FILE.
-q, --question Don't build; exit status says if up to date.
-Q Suppress "Reading/Building" progress messages.
--random Build dependencies in random order.
-s, --silent, --quiet Don't print commands.
--site-dir=DIR Use DIR instead of the usual site_scons dir.
--stack-size=N Set the stack size of the threads used to run
jobs to N kilobytes.
--taskmastertrace=FILE Trace Node evaluation to FILE.
--tree=OPTIONS Print a dependency tree in various formats: all,
derived, prune, status.
-u, --up, --search-up Search up directory tree for SConstruct,
build targets at or below current directory.
-U Search up directory tree for SConstruct,
build Default() targets from local SConscript.
-v, --version Print the SCons version number and exit.
--warn=WARNING-SPEC, --warning=WARNING-SPEC
Enable or disable warnings.
-Y REPOSITORY, --repository=REPOSITORY, --srcdir=REPOSITORY
Search REPOSITORY for source and target files.あぁ、ヘルプ見てもどうやってクロスコンパイルするかわからなかった。
sconsというmake？、autotools？のようなビルドツールを使っているけど使うのは初めてなのでまず、調査から・・・
"SConstruct"というファイルを読み込んでビルドしていくらしい。
ARM Compute LibraryのSConstructは下記の一行が有効な行だった。
sconscriptを読めってか？
SConscript('sconscript', variant_dir='build', duplicate=0)sconscriptの下記の部分を修正する。
if env['arch'] == 'armv7a':
flags += ['-march=armv7-a','-mthumb','-mfpu=neon']
if env['os'] in ['linux','bare_metal']:
prefix = "arm-linux-gnueabihf-"
flags += ['-mfloat-abi=hard']
elif env['os'] == 'android':
prefix = "arm-linux-androideabi-"
flags += ['-mfloat-abi=softfp']if env['arch'] == 'armv7a':
flags += ['-march=armv7-a','-mthumb','-mfpu=neon']
if env['os'] in ['linux','bare_metal']:
prefix = "arm-poky-linux-gnueabi-"
flags += ['-mfloat-abi=hard']
flags += ['--sysroot=/opt/poky/2.2.1-zturn.sdsoc/sysroots/cortexa9hf-neon-poky-linux-gnueabi']
elif env['os'] == 'android':
prefix = "arm-linux-androideabi-"
flags += ['-mfloat-abi=softfp']それでPATHも通してビルドする。
$ export PATH=/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/:${PATH}
% scons debug=1 neon=1 opencl=0 arch=armv7aどうも最後のldでエラーが出たみたい。
arm-poky-linux-gnueabi-g++ -o build/libarm_compute_core.so -shared build/src/core/AccessWindowAutoPadding.os build/src/core/AccessWindowStatic.os build/src/core/AccessWindowTranspose.os build/src/core/Error.os build/src/core/HOGInfo.os build/src/core/Helpers.os build/src/core/IAccessWindow.os build/src/core/IDistribution.os build/src/core/IDistribution1D.os build/src/core/IKernel.os build/src/core/ITensor.os build/src/core/MultiImageInfo.os build/src/core/PyramidInfo.os build/src/core/TensorInfo.os build/src/core/Utils.os build/src/core/Validate.os build/src/core/CPP/ICPPSimpleKernel.os build/src/core/CPP/kernels/CPPCornerCandidatesKernel.os build/src/core/CPP/kernels/CPPSortEuclideanDistanceKernel.os build/src/runtime/CPP/CPPScheduler.os build/src/core/NEON/kernels/NEAbsoluteDifferenceKernel.os build/src/core/NEON/kernels/NEAccumulateKernel.os build/src/core/NEON/kernels/NEActivationLayerKernel.os build/src/core/NEON/kernels/NEArithmeticAdditionKernel.os build/src/core/NEON/kernels/NEArithmeticSubtractionKernel.os build/src/core/NEON/kernels/NEBitwiseAndKernel.os build/src/core/NEON/kernels/NEBitwiseNotKernel.os build/src/core/NEON/kernels/NEBitwiseOrKernel.os build/src/core/NEON/kernels/NEBitwiseXorKernel.os build/src/core/NEON/kernels/NEBox3x3Kernel.os build/src/core/NEON/kernels/NECannyEdgeKernel.os build/src/core/NEON/kernels/NEChannelCombineKernel.os build/src/core/NEON/kernels/NEChannelExtractKernel.os build/src/core/NEON/kernels/NECol2ImKernel.os build/src/core/NEON/kernels/NEColorConvertKernel.os build/src/core/NEON/kernels/NEConvolutionKernel.os build/src/core/NEON/kernels/NEConvolutionLayerWeightsReshapeKernel.os build/src/core/NEON/kernels/NECumulativeDistributionKernel.os build/src/core/NEON/kernels/NEDepthConvertKernel.os build/src/core/NEON/kernels/NEDerivativeKernel.os build/src/core/NEON/kernels/NEDilateKernel.os build/src/core/NEON/kernels/NEErodeKernel.os build/src/core/NEON/kernels/NEFastCornersKernel.os build/src/core/NEON/kernels/NEFillArrayKernel.os build/src/core/NEON/kernels/NEFillBorderKernel.os build/src/core/NEON/kernels/NEFillInnerBorderKernel.os build/src/core/NEON/kernels/NEGEMMInterleave4x4Kernel.os build/src/core/NEON/kernels/NEGEMMLowpMatrixMultiplyKernel.os build/src/core/NEON/kernels/NEGEMMMatrixAccumulateBiasesKernel.os build/src/core/NEON/kernels/NEGEMMMatrixAdditionKernel.os build/src/core/NEON/kernels/NEGEMMMatrixMultiplyKernel.os build/src/core/NEON/kernels/NEGEMMTranspose1xWKernel.os build/src/core/NEON/kernels/NEGaussian3x3Kernel.os build/src/core/NEON/kernels/NEGaussian5x5Kernel.os build/src/core/NEON/kernels/NEGaussianPyramidKernel.os build/src/core/NEON/kernels/NEHOGDescriptorKernel.os build/src/core/NEON/kernels/NEHOGDetectorKernel.os build/src/core/NEON/kernels/NEHOGNonMaximaSuppressionKernel.os build/src/core/NEON/kernels/NEHarrisCornersKernel.os build/src/core/NEON/kernels/NEHistogramKernel.os build/src/core/NEON/kernels/NEIm2ColKernel.os build/src/core/NEON/kernels/NEIntegralImageKernel.os build/src/core/NEON/kernels/NELKTrackerKernel.os build/src/core/NEON/kernels/NEMagnitudePhaseKernel.os build/src/core/NEON/kernels/NEMeanStdDevKernel.os build/src/core/NEON/kernels/NEMedian3x3Kernel.os build/src/core/NEON/kernels/NEMinMaxLocationKernel.os build/src/core/NEON/kernels/NENonLinearFilterKernel.os build/src/core/NEON/kernels/NENonMaximaSuppression3x3Kernel.os build/src/core/NEON/kernels/NENormalizationLayerKernel.os build/src/core/NEON/kernels/NEPixelWiseMultiplicationKernel.os build/src/core/NEON/kernels/NEPoolingLayerKernel.os build/src/core/NEON/kernels/NERemapKernel.os build/src/core/NEON/kernels/NEScaleKernel.os build/src/core/NEON/kernels/NEScharr3x3Kernel.os build/src/core/NEON/kernels/NESobel3x3Kernel.os build/src/core/NEON/kernels/NESobel5x5Kernel.os build/src/core/NEON/kernels/NESobel7x7Kernel.os build/src/core/NEON/kernels/NESoftmaxLayerKernel.os build/src/core/NEON/kernels/NETableLookupKernel.os build/src/core/NEON/kernels/NEThresholdKernel.os build/src/core/NEON/kernels/NETransposeKernel.os build/src/core/NEON/kernels/NEWarpKernel.os -Lbuild -L. -Lbuild -L.
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find crti.o: No such file or directory
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find crtbeginS.o: No such file or directory
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find -lstdc++
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find -lm
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find -lgcc_s
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find -lc
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find -lgcc_s
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find crtendS.o: No such file or directory
/opt/poky/2.2.1-zturn.sdsoc/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.2.1/real-ld: cannot find crtn.o: No such file or directory
collect2: error: ld returned 1 exit status
scons: *** [build/libarm_compute_core.so] Error 1
scons: building terminated because of errors.sconscriptoの次の行の下にLinker Flagを追加する。
env.Append(CXXFLAGS=flags)まぁ、こんな風にするんだろうなぁ。
env.Append(CXXFLAGS=flags)
# linker flags
env.Append(LINKFLAGS = [
'--sysroot=/opt/poky/2.2.1-zturn.sdsoc/sysroots/cortexa9hf-neon-poky-linux-gnueabi'
])これでビルドできた。
$ ls build/
examples libarm_compute_core-static.a neon_scale
libarm_compute-static.a libarm_compute_core.so src
libarm_compute.so neon_convolution test_helpersビルドできたからなんだってんだ？
試すのはまた後日にする。
今は技術書典向けの作業と他におもちゃがあって手がいっぱいなのだ。
Tweet write: 2017/04/06/ 23:54:23