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# -*- coding: utf-8 -*-
# Copyright (c) 2023 Arm Limited.
#
# SPDX-License-Identifier: MIT
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import SCons
import os
from subprocess import check_output
def version_at_least(version, required):
version_list = version.split('.')
required_list = required.split('.')
end = min(len(version_list), len(required_list))
for i in range(0, end):
if int(version_list[i]) < int(required_list[i]):
return False
elif int(version_list[i]) > int(required_list[i]):
return True
return True
vars = Variables("scons")
vars.AddVariables(
BoolVariable("debug", "Debug", False),
BoolVariable("asserts", "Enable asserts (this flag is forced to 1 for debug=1)", False),
EnumVariable("arch", "Target Architecture.", "armv8.2-a",
allowed_values=("x86_64", "armv8.2-a")),
EnumVariable("os", "Target OS.", "linux", allowed_values=("linux", "android")),
EnumVariable("build", "Either build directly on your device (native) or cross compile from your desktop machine (cross-compile). In both cases make sure the compiler is available in your path.", "cross_compile", allowed_values=("native", "cross_compile", "embed_only")),
BoolVariable("Werror", "Enable/disable the -Werror compilation flag", True),
PathVariable("build_dir", "Specify sub-folder for the build", ".", PathVariable.PathAccept),
PathVariable("install_dir", "Specify sub-folder for the install", "", PathVariable.PathAccept),
BoolVariable("exceptions", "Enable/disable C++ exception support", True),
PathVariable("linker_script", "Use an external linker script", "", PathVariable.PathAccept),
("toolchain_prefix", "Override the toolchain prefix; used by all toolchain components: compilers, linker, assembler etc. If unspecified, use default(auto) prefixes; if passed an empty string '' prefixes would be disabled", "auto"),
("compiler_prefix", "Override the compiler prefix; used by just compilers (CC,CXX); further overrides toolchain_prefix for compilers; this is for when the compiler prefixes are different from that of the linkers, archivers etc. If unspecified, this is the same as toolchain_prefix; if passed an empty string '' prefixes would be disabled", "auto"),
("extra_cxx_flags", "Extra CXX flags to be appended to the build command", ""),
("extra_link_flags", "Extra LD flags to be appended to the build command", ""),
("compiler_cache", "Command to prefix to the C and C++ compiler (e.g ccache)", ""),
("specs_file", "Specs file to use (e.g. rdimon.specs)", "")
)
if version_at_least(SCons.__version__, "4.0"):
vars.Add(BoolVariable("export_compile_commands", "Export compile_commands.json file.", False))
env = Environment(variables=vars, ENV = os.environ)
build_path = env['build_dir']
# If build_dir is a relative path then add a #build/ prefix:
if not env['build_dir'].startswith('/'):
SConsignFile('build/%s/.scons' % build_path)
build_path = "#build/%s" % build_path
else:
SConsignFile('%s/.scons' % build_path)
install_path = env['install_dir']
#If the install_dir is a relative path then assume it's from inside build_dir
if not env['install_dir'].startswith('/') and install_path != "":
install_path = "%s/%s" % (build_path, install_path)
env.Append(LIBPATH = [build_path])
Export('env')
Export('vars')
def install_lib( lib ):
# If there is no install folder, then there is nothing to do:
if install_path == "":
return lib
return env.Install( "%s/lib/" % install_path, lib)
def install_bin( bin ):
# If there is no install folder, then there is nothing to do:
if install_path == "":
return bin
return env.Install( "%s/bin/" % install_path, bin)
def install_include( inc ):
if install_path == "":
return inc
return env.Install( "%s/include/" % install_path, inc)
Export('install_lib')
Export('install_bin')
Help(vars.GenerateHelpText(env))
env.Append(CXXFLAGS = [
'-Wextra','-Wdisabled-optimization','-Wformat=2',
'-Winit-self','-Wstrict-overflow=2','-Wswitch-default',
'-Woverloaded-virtual', '-Wformat-security',
'-Wctor-dtor-privacy','-Wsign-promo','-Weffc++','-Wno-overlength-strings'])
env.Append(CXXFLAGS = ['-Wall','-std=c++14', '-pedantic' ])
env.Append(CPPDEFINES = ['_GLIBCXX_USE_NANOSLEEP'])
cpp_tool = {'linux': 'g++', 'android' : 'clang++'}
c_tool = {'linux':'gcc', 'android': 'clang'}
default_cpp_compiler = cpp_tool[env['os']]
default_c_compiler = c_tool[env['os']]
cpp_compiler = os.environ.get('CXX', default_cpp_compiler)
c_compiler = os.environ.get('CC', default_c_compiler)
if env['os'] == 'android' and ( 'clang++' not in cpp_compiler or 'clang' not in c_compiler ):
print( "WARNING: Only clang is officially supported to build the Compute Kernel Writer (CKW) for Android")
if 'clang++' in cpp_compiler:
env.Append(CXXFLAGS = ['-Wno-vla-extension'])
elif 'armclang' in cpp_compiler:
pass
else:
env.Append(CXXFLAGS = ['-Wlogical-op','-Wnoexcept','-Wstrict-null-sentinel','-Wno-misleading-indentation'])
if cpp_compiler == 'g++':
# Don't strip comments that could include markers
env.Append(CXXFLAGS = ['-C'])
if 'armv8-a' in env['arch']:
env.Append(CXXFLAGS = ['-march=armv8-a'])
if 'x86_64' in env['arch']:
env.Append(CXXFLAGS = ['-fPIC'])
env.Append(CCFLAGS = ['-m64'])
env.Append(LINKFLAGS = ['-m64'])
# Define toolchain
# The reason why we distinguish toolchain_prefix from compiler_prefix is for cases where the linkers/archivers use a
# different prefix than the compilers. An example is the NDK r20 toolchain
auto_toolchain_prefix = ""
if 'x86' not in env['arch']:
if env['os'] == 'linux':
auto_toolchain_prefix = "aarch64-linux-gnu-"
elif env['os'] == 'android':
auto_toolchain_prefix = "aarch64-tizen-linux-gnu-"
if env['build'] == 'native' or env["toolchain_prefix"] == "":
toolchain_prefix = ""
elif env["toolchain_prefix"] == "auto":
toolchain_prefix = auto_toolchain_prefix
else:
toolchain_prefix = env["toolchain_prefix"]
if env['build'] == 'native' or env["compiler_prefix"] == "":
compiler_prefix = ""
elif env["compiler_prefix"] == "auto":
compiler_prefix = toolchain_prefix
else:
compiler_prefix = env["compiler_prefix"]
env['CC'] = env['compiler_cache']+ " " + compiler_prefix + c_compiler
env['CXX'] = env['compiler_cache']+ " " + compiler_prefix + cpp_compiler
env['LD'] = toolchain_prefix + "ld"
env['AS'] = toolchain_prefix + "as"
env['AR'] = toolchain_prefix + "ar"
env['RANLIB'] = toolchain_prefix + "ranlib"
print("Using compilers:")
print("CC", env['CC'])
print("CXX", env['CXX'])
if not GetOption("help"):
try:
compiler_ver = check_output(env['CXX'].split() + ["-dumpversion"]).decode().strip()
except OSError:
print("ERROR: Compiler '%s' not found" % env['CXX'])
Exit(1)
if 'armclang' in cpp_compiler:
pass
elif 'clang++' not in cpp_compiler:
if env['arch'] == 'arm64-v8.2-a' and not version_at_least(compiler_ver, '6.2.1'):
print("GCC 6.2.1 or newer is required to compile armv8.2-a code")
Exit(1)
if version_at_least(compiler_ver, '6.1'):
env.Append(CXXFLAGS = ['-Wno-ignored-attributes'])
if compiler_ver == '4.8.3':
env.Append(CXXFLAGS = ['-Wno-array-bounds'])
# Add Android NDK toolchain specific flags
if 'clang++' in cpp_compiler and env['os'] == 'android':
# For NDK >= r21, clang 9 or above is used
if version_at_least(compiler_ver, '9.0.0'):
env['ndk_above_r21'] = True
# For NDK >= r23, clang 12 or above is used. This condition detects NDK < r23
if not version_at_least(compiler_ver, '12.0.0'):
# System assembler is deprecated and integrated assembler is preferred since r23.
# However integrated assembler has always been suppressed for NDK < r23.
# Thus for backward compatibility, we include this flag only for NDK < r23
env.Append(CXXFLAGS = ['-no-integrated-as'])
if env['Werror']:
env.Append(CXXFLAGS = ['-Werror'])
if env['os'] == 'android':
env.Append(CPPDEFINES = ['ANDROID'])
env.Append(LINKFLAGS = ['-pie', '-static-libstdc++', '-ldl'])
if env['specs_file'] != "":
env.Append(LINKFLAGS = ['-specs='+env['specs_file']])
if env['debug']:
env['asserts'] = True
env.Append(CXXFLAGS = ['-O0','-g','-gdwarf-2'])
env.Append(CPPDEFINES = ['COMPUTE_KERNEL_WRITER_DEBUG_ENABLED'])
else:
# Optimize for size
env.Append(CXXFLAGS = ['-Os'])
if env['asserts']:
env.Append(CPPDEFINES = ['COMPUTE_KERNEL_WRITER_ASSERTS_ENABLED'])
env.Append(CXXFLAGS = ['-fstack-protector-strong'])
env.Append(CPPPATH = ['#/include', "#"])
env.Append(CXXFLAGS = env['extra_cxx_flags'])
env.Append(LINKFLAGS = env['extra_link_flags'])
env.Append(LIBS = [])
Export('version_at_least')
SConscript('./SConscript', variant_dir=build_path, duplicate=0)
# Tests
SConscript('./validation/SConscript', variant_dir='%s/validation' % build_path, duplicate=0)
# Unknown variables are not allowed
# Note: we must delay the call of UnknownVariables until after
# we have applied the Variables object to the construction environment
unknown = vars.UnknownVariables()
if unknown:
print("Unknown variables: %s" % " ".join(unknown.keys()))
Exit(1)
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