X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=SConstruct;h=d81c5abd964cafc24613d77232f112842c35e5f6;hb=30746da58f3dbcb37df6214999ad48cb7df1cc4a;hp=842c4fef59fb67d7f8cdf4f70313fe26be6087e6;hpb=4544f3def42ae9b8c528223d8762ae3634c7124a;p=gem5.git diff --git a/SConstruct b/SConstruct index 842c4fef5..d81c5abd9 100755 --- a/SConstruct +++ b/SConstruct @@ -1,5 +1,17 @@ # -*- mode:python -*- +# Copyright (c) 2013, 2015-2017 ARM Limited +# All rights reserved. +# +# The license below extends only to copyright in the software and shall +# not be construed as granting a license to any other intellectual +# property including but not limited to intellectual property relating +# to a hardware implementation of the functionality of the software +# licensed hereunder. You may use the software subject to the license +# terms below provided that you ensure that this notice is replicated +# unmodified and in its entirety in all distributions of the software, +# modified or unmodified, in source code or in binary form. +# # Copyright (c) 2011 Advanced Micro Devices, Inc. # Copyright (c) 2009 The Hewlett-Packard Development Company # Copyright (c) 2004-2005 The Regents of The University of Michigan @@ -66,40 +78,13 @@ # ################################################### -# Check for recent-enough Python and SCons versions. -try: - # Really old versions of scons only take two options for the - # function, so check once without the revision and once with the - # revision, the first instance will fail for stuff other than - # 0.98, and the second will fail for 0.98.0 - EnsureSConsVersion(0, 98) - EnsureSConsVersion(0, 98, 1) -except SystemExit, e: - print """ -For more details, see: - http://gem5.org/Dependencies -""" - raise - -# We ensure the python version early because we have stuff that -# requires python 2.4 -try: - EnsurePythonVersion(2, 4) -except SystemExit, e: - print """ -You can use a non-default installation of the Python interpreter by -either (1) rearranging your PATH so that scons finds the non-default -'python' first or (2) explicitly invoking an alternative interpreter -on the scons script. - -For more details, see: - http://gem5.org/wiki/index.php/Using_a_non-default_Python_installation -""" - raise +from __future__ import print_function # Global Python includes +import itertools import os import re +import shutil import subprocess import sys @@ -112,15 +97,7 @@ from os.path import join as joinpath, split as splitpath import SCons import SCons.Node -extra_python_paths = [ - Dir('src/python').srcnode().abspath, # gem5 includes - Dir('ext/ply').srcnode().abspath, # ply is used by several files - ] - -sys.path[1:1] = extra_python_paths - from m5.util import compareVersions, readCommand -from m5.util.terminal import get_termcap help_texts = { "options" : "", @@ -161,122 +138,56 @@ AddLocalOption('--colors', dest='use_colors', action='store_true', help="Add color to abbreviated scons output") AddLocalOption('--no-colors', dest='use_colors', action='store_false', help="Don't add color to abbreviated scons output") +AddLocalOption('--with-cxx-config', dest='with_cxx_config', + action='store_true', + help="Build with support for C++-based configuration") AddLocalOption('--default', dest='default', type='string', action='store', help='Override which build_opts file to use for defaults') AddLocalOption('--ignore-style', dest='ignore_style', action='store_true', help='Disable style checking hooks') AddLocalOption('--no-lto', dest='no_lto', action='store_true', help='Disable Link-Time Optimization for fast') +AddLocalOption('--force-lto', dest='force_lto', action='store_true', + help='Use Link-Time Optimization instead of partial linking' + + ' when the compiler doesn\'t support using them together.') AddLocalOption('--update-ref', dest='update_ref', action='store_true', help='Update test reference outputs') AddLocalOption('--verbose', dest='verbose', action='store_true', help='Print full tool command lines') - -termcap = get_termcap(GetOption('use_colors')) +AddLocalOption('--without-python', dest='without_python', + action='store_true', + help='Build without Python configuration support') +AddLocalOption('--without-tcmalloc', dest='without_tcmalloc', + action='store_true', + help='Disable linking against tcmalloc') +AddLocalOption('--with-ubsan', dest='with_ubsan', action='store_true', + help='Build with Undefined Behavior Sanitizer if available') +AddLocalOption('--with-asan', dest='with_asan', action='store_true', + help='Build with Address Sanitizer if available') + +if GetOption('no_lto') and GetOption('force_lto'): + print('--no-lto and --force-lto are mutually exclusive') + Exit(1) ######################################################################## # # Set up the main build environment. # ######################################################################## -use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', - 'LIBRARY_PATH', 'PATH', 'PYTHONPATH', 'RANLIB', 'SWIG' ]) -use_env = {} -for key,val in os.environ.iteritems(): - if key in use_vars or key.startswith("M5"): - use_env[key] = val +main = Environment() -main = Environment(ENV=use_env) -main.Decider('MD5-timestamp') -main.root = Dir(".") # The current directory (where this file lives). -main.srcdir = Dir("src") # The source directory +from gem5_scons import Transform +from gem5_scons.util import get_termcap +termcap = get_termcap() main_dict_keys = main.Dictionary().keys() # Check that we have a C/C++ compiler if not ('CC' in main_dict_keys and 'CXX' in main_dict_keys): - print "No C++ compiler installed (package g++ on Ubuntu and RedHat)" - Exit(1) - -# Check that swig is present -if not 'SWIG' in main_dict_keys: - print "swig is not installed (package swig on Ubuntu and RedHat)" + print("No C++ compiler installed (package g++ on Ubuntu and RedHat)") Exit(1) -# add useful python code PYTHONPATH so it can be used by subprocesses -# as well -main.AppendENVPath('PYTHONPATH', extra_python_paths) - -######################################################################## -# -# Mercurial Stuff. -# -# If the gem5 directory is a mercurial repository, we should do some -# extra things. -# -######################################################################## - -hgdir = main.root.Dir(".hg") - -mercurial_style_message = """ -You're missing the gem5 style hook, which automatically checks your code -against the gem5 style rules on hg commit and qrefresh commands. This -script will now install the hook in your .hg/hgrc file. -Press enter to continue, or ctrl-c to abort: """ - -mercurial_style_hook = """ -# The following lines were automatically added by gem5/SConstruct -# to provide the gem5 style-checking hooks -[extensions] -style = %s/util/style.py - -[hooks] -pretxncommit.style = python:style.check_style -pre-qrefresh.style = python:style.check_style -# End of SConstruct additions - -""" % (main.root.abspath) - -mercurial_lib_not_found = """ -Mercurial libraries cannot be found, ignoring style hook. If -you are a gem5 developer, please fix this and run the style -hook. It is important. -""" - -# Check for style hook and prompt for installation if it's not there. -# Skip this if --ignore-style was specified, there's no .hg dir to -# install a hook in, or there's no interactive terminal to prompt. -if not GetOption('ignore_style') and hgdir.exists() and sys.stdin.isatty(): - style_hook = True - try: - from mercurial import ui - ui = ui.ui() - ui.readconfig(hgdir.File('hgrc').abspath) - style_hook = ui.config('hooks', 'pretxncommit.style', None) and \ - ui.config('hooks', 'pre-qrefresh.style', None) - except ImportError: - print mercurial_lib_not_found - - if not style_hook: - print mercurial_style_message, - # continue unless user does ctrl-c/ctrl-d etc. - try: - raw_input() - except: - print "Input exception, exiting scons.\n" - sys.exit(1) - hgrc_path = '%s/.hg/hgrc' % main.root.abspath - print "Adding style hook to", hgrc_path, "\n" - try: - hgrc = open(hgrc_path, 'a') - hgrc.write(mercurial_style_hook) - hgrc.close() - except: - print "Error updating", hgrc_path - sys.exit(1) - - ################################################### # # Figure out which configurations to set up based on the path(s) of @@ -321,15 +232,15 @@ for t in BUILD_TARGETS: try: build_top = rfind(path_dirs, 'build', -2) except: - print "Error: no non-leaf 'build' dir found on target path", t + print("Error: no non-leaf 'build' dir found on target path", t) Exit(1) this_build_root = joinpath('/',*path_dirs[:build_top+1]) if not build_root: build_root = this_build_root else: if this_build_root != build_root: - print "Error: build targets not under same build root\n"\ - " %s\n %s" % (build_root, this_build_root) + print("Error: build targets not under same build root\n" + " %s\n %s" % (build_root, this_build_root)) Exit(1) variant_path = joinpath('/',*path_dirs[:build_top+2]) if variant_path not in variant_paths: @@ -362,7 +273,7 @@ global_vars = Variables(global_vars_file, args=ARGUMENTS) global_vars.AddVariables( ('CC', 'C compiler', environ.get('CC', main['CC'])), ('CXX', 'C++ compiler', environ.get('CXX', main['CXX'])), - ('SWIG', 'SWIG tool', environ.get('SWIG', main['SWIG'])), + ('PROTOC', 'protoc tool', environ.get('PROTOC', 'protoc')), ('BATCH', 'Use batch pool for build and tests', False), ('BATCH_CMD', 'Batch pool submission command name', 'qdo'), ('M5_BUILD_CACHE', 'Cache built objects in this directory', False), @@ -390,89 +301,8 @@ Export('extras_dir_list') # the ext directory should be on the #includes path main.Append(CPPPATH=[Dir('ext')]) -def strip_build_path(path, env): - path = str(path) - variant_base = env['BUILDROOT'] + os.path.sep - if path.startswith(variant_base): - path = path[len(variant_base):] - elif path.startswith('build/'): - path = path[6:] - return path - -# Generate a string of the form: -# common/path/prefix/src1, src2 -> tgt1, tgt2 -# to print while building. -class Transform(object): - # all specific color settings should be here and nowhere else - tool_color = termcap.Normal - pfx_color = termcap.Yellow - srcs_color = termcap.Yellow + termcap.Bold - arrow_color = termcap.Blue + termcap.Bold - tgts_color = termcap.Yellow + termcap.Bold - - def __init__(self, tool, max_sources=99): - self.format = self.tool_color + (" [%8s] " % tool) \ - + self.pfx_color + "%s" \ - + self.srcs_color + "%s" \ - + self.arrow_color + " -> " \ - + self.tgts_color + "%s" \ - + termcap.Normal - self.max_sources = max_sources - - def __call__(self, target, source, env, for_signature=None): - # truncate source list according to max_sources param - source = source[0:self.max_sources] - def strip(f): - return strip_build_path(str(f), env) - if len(source) > 0: - srcs = map(strip, source) - else: - srcs = [''] - tgts = map(strip, target) - # surprisingly, os.path.commonprefix is a dumb char-by-char string - # operation that has nothing to do with paths. - com_pfx = os.path.commonprefix(srcs + tgts) - com_pfx_len = len(com_pfx) - if com_pfx: - # do some cleanup and sanity checking on common prefix - if com_pfx[-1] == ".": - # prefix matches all but file extension: ok - # back up one to change 'foo.cc -> o' to 'foo.cc -> .o' - com_pfx = com_pfx[0:-1] - elif com_pfx[-1] == "/": - # common prefix is directory path: OK - pass - else: - src0_len = len(srcs[0]) - tgt0_len = len(tgts[0]) - if src0_len == com_pfx_len: - # source is a substring of target, OK - pass - elif tgt0_len == com_pfx_len: - # target is a substring of source, need to back up to - # avoid empty string on RHS of arrow - sep_idx = com_pfx.rfind(".") - if sep_idx != -1: - com_pfx = com_pfx[0:sep_idx] - else: - com_pfx = '' - elif src0_len > com_pfx_len and srcs[0][com_pfx_len] == ".": - # still splitting at file extension: ok - pass - else: - # probably a fluke; ignore it - com_pfx = '' - # recalculate length in case com_pfx was modified - com_pfx_len = len(com_pfx) - def fmt(files): - f = map(lambda s: s[com_pfx_len:], files) - return ', '.join(f) - return self.format % (com_pfx, fmt(srcs), fmt(tgts)) - -Export('Transform') - -# enable the regression script to use the termcap -main['TERMCAP'] = termcap +# Add shared top-level headers +main.Prepend(CPPPATH=Dir('include')) if GetOption('verbose'): def MakeAction(action, string, *args, **kwargs): @@ -482,9 +312,9 @@ else: main['CCCOMSTR'] = Transform("CC") main['CXXCOMSTR'] = Transform("CXX") main['ASCOMSTR'] = Transform("AS") - main['SWIGCOMSTR'] = Transform("SWIG") main['ARCOMSTR'] = Transform("AR", 0) main['LINKCOMSTR'] = Transform("LINK", 0) + main['SHLINKCOMSTR'] = Transform("SHLINK", 0) main['RANLIBCOMSTR'] = Transform("RANLIB", 0) main['M4COMSTR'] = Transform("M4") main['SHCCCOMSTR'] = Transform("SHCC") @@ -495,105 +325,230 @@ Export('MakeAction') main['LTO_CCFLAGS'] = [] main['LTO_LDFLAGS'] = [] +# According to the readme, tcmalloc works best if the compiler doesn't +# assume that we're using the builtin malloc and friends. These flags +# are compiler-specific, so we need to set them after we detect which +# compiler we're using. +main['TCMALLOC_CCFLAGS'] = [] + CXX_version = readCommand([main['CXX'],'--version'], exception=False) CXX_V = readCommand([main['CXX'],'-V'], exception=False) main['GCC'] = CXX_version and CXX_version.find('g++') >= 0 -main['SUNCC'] = CXX_V and CXX_V.find('Sun C++') >= 0 -main['ICC'] = CXX_V and CXX_V.find('Intel') >= 0 main['CLANG'] = CXX_version and CXX_version.find('clang') >= 0 -if main['GCC'] + main['SUNCC'] + main['ICC'] + main['CLANG'] > 1: - print 'Error: How can we have two at the same time?' +if main['GCC'] + main['CLANG'] > 1: + print('Error: How can we have two at the same time?') Exit(1) # Set up default C++ compiler flags -if main['GCC']: +if main['GCC'] or main['CLANG']: + # As gcc and clang share many flags, do the common parts here main.Append(CCFLAGS=['-pipe']) main.Append(CCFLAGS=['-fno-strict-aliasing']) - main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef']) - # Read the GCC version to check for versions with bugs - # Note CCVERSION doesn't work here because it is run with the CC - # before we override it from the command line + # Enable -Wall and -Wextra and then disable the few warnings that + # we consistently violate + main.Append(CCFLAGS=['-Wall', '-Wundef', '-Wextra', + '-Wno-sign-compare', '-Wno-unused-parameter']) + # We always compile using C++11 + main.Append(CXXFLAGS=['-std=c++11']) + if sys.platform.startswith('freebsd'): + main.Append(CCFLAGS=['-I/usr/local/include']) + main.Append(CXXFLAGS=['-I/usr/local/include']) + + main['FILTER_PSHLINKFLAGS'] = lambda x: str(x).replace(' -shared', '') + main['PSHLINKFLAGS'] = main.subst('${FILTER_PSHLINKFLAGS(SHLINKFLAGS)}') + main['PLINKFLAGS'] = main.subst('${LINKFLAGS}') + shared_partial_flags = ['-r', '-nostdlib'] + main.Append(PSHLINKFLAGS=shared_partial_flags) + main.Append(PLINKFLAGS=shared_partial_flags) + + # Treat warnings as errors but white list some warnings that we + # want to allow (e.g., deprecation warnings). + main.Append(CCFLAGS=['-Werror', + '-Wno-error=deprecated-declarations', + '-Wno-error=deprecated', + ]) +else: + print(termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal, end=' ') + print("Don't know what compiler options to use for your compiler.") + print(termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX']) + print(termcap.Yellow + ' version:' + termcap.Normal, end = ' ') + if not CXX_version: + print(termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" + + termcap.Normal) + else: + print(CXX_version.replace('\n', '')) + print(" If you're trying to use a compiler other than GCC") + print(" or clang, there appears to be something wrong with your") + print(" environment.") + print(" ") + print(" If you are trying to use a compiler other than those listed") + print(" above you will need to ease fix SConstruct and ") + print(" src/SConscript to support that compiler.") + Exit(1) + +if main['GCC']: + # Check for a supported version of gcc. >= 4.8 is chosen for its + # level of c++11 support. See + # http://gcc.gnu.org/projects/cxx0x.html for details. gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False) + if compareVersions(gcc_version, "4.8") < 0: + print('Error: gcc version 4.8 or newer required.') + print(' Installed version: ', gcc_version) + Exit(1) + main['GCC_VERSION'] = gcc_version - if not compareVersions(gcc_version, '4.4.1') or \ - not compareVersions(gcc_version, '4.4.2'): - print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.' - main.Append(CCFLAGS=['-fno-tree-vectorize']) - # c++0x support in gcc is useful already from 4.4, see - # http://gcc.gnu.org/projects/cxx0x.html for details - if compareVersions(gcc_version, '4.4') >= 0: - main.Append(CXXFLAGS=['-std=c++0x']) - - # LTO support is only really working properly from 4.6 and beyond - if compareVersions(gcc_version, '4.6') >= 0: - # Add the appropriate Link-Time Optimization (LTO) flags - # unless LTO is explicitly turned off. Note that these flags - # are only used by the fast target. - if not GetOption('no_lto'): - # Pass the LTO flag when compiling to produce GIMPLE - # output, we merely create the flags here and only append - # them later/ - main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')] - - # Use the same amount of jobs for LTO as we are running - # scons with, we hardcode the use of the linker plugin - # which requires either gold or GNU ld >= 2.21 - main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs'), - '-fuse-linker-plugin'] - -elif main['ICC']: - pass #Fix me... add warning flags once we clean up icc warnings -elif main['SUNCC']: - main.Append(CCFLAGS=['-Qoption ccfe']) - main.Append(CCFLAGS=['-features=gcc']) - main.Append(CCFLAGS=['-features=extensions']) - main.Append(CCFLAGS=['-library=stlport4']) - main.Append(CCFLAGS=['-xar']) - #main.Append(CCFLAGS=['-instances=semiexplicit']) + + if compareVersions(gcc_version, '4.9') >= 0: + # Incremental linking with LTO is currently broken in gcc versions + # 4.9 and above. A version where everything works completely hasn't + # yet been identified. + # + # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67548 + main['BROKEN_INCREMENTAL_LTO'] = True + if compareVersions(gcc_version, '6.0') >= 0: + # gcc versions 6.0 and greater accept an -flinker-output flag which + # selects what type of output the linker should generate. This is + # necessary for incremental lto to work, but is also broken in + # current versions of gcc. It may not be necessary in future + # versions. We add it here since it might be, and as a reminder that + # it exists. It's excluded if lto is being forced. + # + # https://gcc.gnu.org/gcc-6/changes.html + # https://gcc.gnu.org/ml/gcc-patches/2015-11/msg03161.html + # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69866 + if not GetOption('force_lto'): + main.Append(PSHLINKFLAGS='-flinker-output=rel') + main.Append(PLINKFLAGS='-flinker-output=rel') + + # Make sure we warn if the user has requested to compile with the + # Undefined Benahvior Sanitizer and this version of gcc does not + # support it. + if GetOption('with_ubsan') and \ + compareVersions(gcc_version, '4.9') < 0: + print(termcap.Yellow + termcap.Bold + + 'Warning: UBSan is only supported using gcc 4.9 and later.' + + termcap.Normal) + + disable_lto = GetOption('no_lto') + if not disable_lto and main.get('BROKEN_INCREMENTAL_LTO', False) and \ + not GetOption('force_lto'): + print(termcap.Yellow + termcap.Bold + + 'Warning: Your compiler doesn\'t support incremental linking' + + ' and lto at the same time, so lto is being disabled. To force' + + ' lto on anyway, use the --force-lto option. That will disable' + + ' partial linking.' + + termcap.Normal) + disable_lto = True + + # Add the appropriate Link-Time Optimization (LTO) flags + # unless LTO is explicitly turned off. Note that these flags + # are only used by the fast target. + if not disable_lto: + # Pass the LTO flag when compiling to produce GIMPLE + # output, we merely create the flags here and only append + # them later + main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')] + + # Use the same amount of jobs for LTO as we are running + # scons with + main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs')] + + main.Append(TCMALLOC_CCFLAGS=['-fno-builtin-malloc', '-fno-builtin-calloc', + '-fno-builtin-realloc', '-fno-builtin-free']) + + # The address sanitizer is available for gcc >= 4.8 + if GetOption('with_asan'): + if GetOption('with_ubsan') and \ + compareVersions(main['GCC_VERSION'], '4.9') >= 0: + main.Append(CCFLAGS=['-fsanitize=address,undefined', + '-fno-omit-frame-pointer'], + LINKFLAGS='-fsanitize=address,undefined') + else: + main.Append(CCFLAGS=['-fsanitize=address', + '-fno-omit-frame-pointer'], + LINKFLAGS='-fsanitize=address') + # Only gcc >= 4.9 supports UBSan, so check both the version + # and the command-line option before adding the compiler and + # linker flags. + elif GetOption('with_ubsan') and \ + compareVersions(main['GCC_VERSION'], '4.9') >= 0: + main.Append(CCFLAGS='-fsanitize=undefined') + main.Append(LINKFLAGS='-fsanitize=undefined') + elif main['CLANG']: + # Check for a supported version of clang, >= 3.1 is needed to + # support similar features as gcc 4.8. See + # http://clang.llvm.org/cxx_status.html for details clang_version_re = re.compile(".* version (\d+\.\d+)") - clang_version_match = clang_version_re.match(CXX_version) + clang_version_match = clang_version_re.search(CXX_version) if (clang_version_match): clang_version = clang_version_match.groups()[0] - if compareVersions(clang_version, "2.9") < 0: - print 'Error: clang version 2.9 or newer required.' - print ' Installed version:', clang_version + if compareVersions(clang_version, "3.1") < 0: + print('Error: clang version 3.1 or newer required.') + print(' Installed version:', clang_version) Exit(1) else: - print 'Error: Unable to determine clang version.' + print('Error: Unable to determine clang version.') Exit(1) - main.Append(CCFLAGS=['-pipe']) - main.Append(CCFLAGS=['-fno-strict-aliasing']) - main.Append(CCFLAGS=['-Wall', '-Wno-sign-compare', '-Wundef']) - main.Append(CCFLAGS=['-Wno-tautological-compare']) - main.Append(CCFLAGS=['-Wno-self-assign']) - # Ruby makes frequent use of extraneous parantheses in the printing - # of if-statements - main.Append(CCFLAGS=['-Wno-parentheses']) - - # clang 2.9 does not play well with c++0x as it ships with C++ - # headers that produce errors, this was fixed in 3.0 - if compareVersions(clang_version, "3") >= 0: - main.Append(CXXFLAGS=['-std=c++0x']) + # clang has a few additional warnings that we disable, extraneous + # parantheses are allowed due to Ruby's printing of the AST, + # finally self assignments are allowed as the generated CPU code + # is relying on this + main.Append(CCFLAGS=['-Wno-parentheses', + '-Wno-self-assign', + # Some versions of libstdc++ (4.8?) seem to + # use struct hash and class hash + # interchangeably. + '-Wno-mismatched-tags', + ]) + + main.Append(TCMALLOC_CCFLAGS=['-fno-builtin']) + + # On Mac OS X/Darwin we need to also use libc++ (part of XCode) as + # opposed to libstdc++, as the later is dated. + if sys.platform == "darwin": + main.Append(CXXFLAGS=['-stdlib=libc++']) + main.Append(LIBS=['c++']) + + # On FreeBSD we need libthr. + if sys.platform.startswith('freebsd'): + main.Append(LIBS=['thr']) + + # We require clang >= 3.1, so there is no need to check any + # versions here. + if GetOption('with_ubsan'): + if GetOption('with_asan'): + main.Append(CCFLAGS=['-fsanitize=address,undefined', + '-fno-omit-frame-pointer'], + LINKFLAGS='-fsanitize=address,undefined') + else: + main.Append(CCFLAGS='-fsanitize=undefined', + LINKFLAGS='-fsanitize=undefined') + + elif GetOption('with_asan'): + main.Append(CCFLAGS=['-fsanitize=address', + '-fno-omit-frame-pointer'], + LINKFLAGS='-fsanitize=address') + else: - print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal, - print "Don't know what compiler options to use for your compiler." - print termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX'] - print termcap.Yellow + ' version:' + termcap.Normal, + print(termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal, end=' ') + print("Don't know what compiler options to use for your compiler.") + print(termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX']) + print(termcap.Yellow + ' version:' + termcap.Normal, end=' ') if not CXX_version: - print termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" +\ - termcap.Normal + print(termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" + + termcap.Normal) else: - print CXX_version.replace('\n', '') - print " If you're trying to use a compiler other than GCC, ICC, SunCC," - print " or clang, there appears to be something wrong with your" - print " environment." - print " " - print " If you are trying to use a compiler other than those listed" - print " above you will need to ease fix SConstruct and " - print " src/SConscript to support that compiler." + print(CXX_version.replace('\n', '')) + print(" If you're trying to use a compiler other than GCC") + print(" or clang, there appears to be something wrong with your") + print(" environment.") + print(" ") + print(" If you are trying to use a compiler other than those listed") + print(" above you will need to ease fix SConstruct and ") + print(" src/SConscript to support that compiler.") Exit(1) # Set up common yacc/bison flags (needed for Ruby) @@ -613,86 +568,77 @@ if sys.platform == 'cygwin': # cygwin has some header file issues... main.Append(CCFLAGS=["-Wno-uninitialized"]) -# Check for SWIG -if not main.has_key('SWIG'): - print 'Error: SWIG utility not found.' - print ' Please install (see http://www.swig.org) and retry.' - Exit(1) - -# Check for appropriate SWIG version -swig_version = readCommand([main['SWIG'], '-version'], exception='').split() -# First 3 words should be "SWIG Version x.y.z" -if len(swig_version) < 3 or \ - swig_version[0] != 'SWIG' or swig_version[1] != 'Version': - print 'Error determining SWIG version.' - Exit(1) - -min_swig_version = '1.3.34' -if compareVersions(swig_version[2], min_swig_version) < 0: - print 'Error: SWIG version', min_swig_version, 'or newer required.' - print ' Installed version:', swig_version[2] - Exit(1) - -# Set up SWIG flags & scanner -swig_flags=Split('-c++ -python -modern -templatereduce $_CPPINCFLAGS') -main.Append(SWIGFLAGS=swig_flags) - -# filter out all existing swig scanners, they mess up the dependency -# stuff for some reason -scanners = [] -for scanner in main['SCANNERS']: - skeys = scanner.skeys - if skeys == '.i': - continue - - if isinstance(skeys, (list, tuple)) and '.i' in skeys: - continue - - scanners.append(scanner) - -# add the new swig scanner that we like better -from SCons.Scanner import ClassicCPP as CPPScanner -swig_inc_re = '^[ \t]*[%,#][ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")' -scanners.append(CPPScanner("SwigScan", [ ".i" ], "CPPPATH", swig_inc_re)) - -# replace the scanners list that has what we want -main['SCANNERS'] = scanners - -# Add a custom Check function to the Configure context so that we can -# figure out if the compiler adds leading underscores to global -# variables. This is needed for the autogenerated asm files that we -# use for embedding the python code. -def CheckLeading(context): - context.Message("Checking for leading underscore in global variables...") - # 1) Define a global variable called x from asm so the C compiler - # won't change the symbol at all. - # 2) Declare that variable. - # 3) Use the variable - # - # If the compiler prepends an underscore, this will successfully - # link because the external symbol 'x' will be called '_x' which - # was defined by the asm statement. If the compiler does not - # prepend an underscore, this will not successfully link because - # '_x' will have been defined by assembly, while the C portion of - # the code will be trying to use 'x' - ret = context.TryLink(''' - asm(".globl _x; _x: .byte 0"); - extern int x; - int main() { return x; } - ''', extension=".c") - context.env.Append(LEADING_UNDERSCORE=ret) - context.Result(ret) - return ret - -# Test for the presence of C++11 static asserts. If the compiler lacks -# support for static asserts, base/compiler.hh enables a macro that -# removes any static asserts in the code. -def CheckStaticAssert(context): - context.Message("Checking for C++11 static_assert support...") - ret = context.TryCompile(''' - static_assert(1, "This assert is always true"); - ''', extension=".cc") - context.env.Append(HAVE_STATIC_ASSERT=ret) +# Check for the protobuf compiler +protoc_version = readCommand([main['PROTOC'], '--version'], + exception='').split() + +# First two words should be "libprotoc x.y.z" +if len(protoc_version) < 2 or protoc_version[0] != 'libprotoc': + print(termcap.Yellow + termcap.Bold + + 'Warning: Protocol buffer compiler (protoc) not found.\n' + + ' Please install protobuf-compiler for tracing support.' + + termcap.Normal) + main['PROTOC'] = False +else: + # Based on the availability of the compress stream wrappers, + # require 2.1.0 + min_protoc_version = '2.1.0' + if compareVersions(protoc_version[1], min_protoc_version) < 0: + print(termcap.Yellow + termcap.Bold + + 'Warning: protoc version', min_protoc_version, + 'or newer required.\n' + + ' Installed version:', protoc_version[1], + termcap.Normal) + main['PROTOC'] = False + else: + # Attempt to determine the appropriate include path and + # library path using pkg-config, that means we also need to + # check for pkg-config. Note that it is possible to use + # protobuf without the involvement of pkg-config. Later on we + # check go a library config check and at that point the test + # will fail if libprotobuf cannot be found. + if readCommand(['pkg-config', '--version'], exception=''): + try: + # Attempt to establish what linking flags to add for protobuf + # using pkg-config + main.ParseConfig('pkg-config --cflags --libs-only-L protobuf') + except: + print(termcap.Yellow + termcap.Bold + + 'Warning: pkg-config could not get protobuf flags.' + + termcap.Normal) + + +# Check for 'timeout' from GNU coreutils. If present, regressions will +# be run with a time limit. We require version 8.13 since we rely on +# support for the '--foreground' option. +if sys.platform.startswith('freebsd'): + timeout_lines = readCommand(['gtimeout', '--version'], + exception='').splitlines() +else: + timeout_lines = readCommand(['timeout', '--version'], + exception='').splitlines() +# Get the first line and tokenize it +timeout_version = timeout_lines[0].split() if timeout_lines else [] +main['TIMEOUT'] = timeout_version and \ + compareVersions(timeout_version[-1], '8.13') >= 0 + +# Add a custom Check function to test for structure members. +def CheckMember(context, include, decl, member, include_quotes="<>"): + context.Message("Checking for member %s in %s..." % + (member, decl)) + text = """ +#include %(header)s +int main(){ + %(decl)s test; + (void)test.%(member)s; + return 0; +}; +""" % { "header" : include_quotes[0] + include + include_quotes[1], + "decl" : decl, + "member" : member, + } + + ret = context.TryCompile(text, extension=".cc") context.Result(ret) return ret @@ -701,16 +647,9 @@ def CheckStaticAssert(context): conf = Configure(main, conf_dir = joinpath(build_root, '.scons_config'), log_file = joinpath(build_root, 'scons_config.log'), - custom_tests = { 'CheckLeading' : CheckLeading, - 'CheckStaticAssert' : CheckStaticAssert, - }) - -# Check for leading underscores. Don't really need to worry either -# way so don't need to check the return code. -conf.CheckLeading() - -# Check for C++11 features we want to use if they exist -conf.CheckStaticAssert() + custom_tests = { + 'CheckMember' : CheckMember, + }) # Check if we should compile a 64 bit binary on Mac OS X/Darwin try: @@ -744,76 +683,96 @@ if not conf: conf = NullConf(main) -# Find Python include and library directories for embedding the -# interpreter. For consistency, we will use the same Python -# installation used to run scons (and thus this script). If you want -# to link in an alternate version, see above for instructions on how -# to invoke scons with a different copy of the Python interpreter. -from distutils import sysconfig - -py_getvar = sysconfig.get_config_var - -py_debug = getattr(sys, 'pydebug', False) -py_version = 'python' + py_getvar('VERSION') + (py_debug and "_d" or "") - -py_general_include = sysconfig.get_python_inc() -py_platform_include = sysconfig.get_python_inc(plat_specific=True) -py_includes = [ py_general_include ] -if py_platform_include != py_general_include: - py_includes.append(py_platform_include) - -py_lib_path = [ py_getvar('LIBDIR') ] -# add the prefix/lib/pythonX.Y/config dir, but only if there is no -# shared library in prefix/lib/. -if not py_getvar('Py_ENABLE_SHARED'): - py_lib_path.append(py_getvar('LIBPL')) - -py_libs = [] -for lib in py_getvar('LIBS').split() + py_getvar('SYSLIBS').split(): - if not lib.startswith('-l'): - # Python requires some special flags to link (e.g. -framework - # common on OS X systems), assume appending preserves order - main.Append(LINKFLAGS=[lib]) - else: - lib = lib[2:] - if lib not in py_libs: - py_libs.append(lib) -py_libs.append(py_version) - -main.Append(CPPPATH=py_includes) -main.Append(LIBPATH=py_lib_path) - # Cache build files in the supplied directory. if main['M5_BUILD_CACHE']: - print 'Using build cache located at', main['M5_BUILD_CACHE'] + print('Using build cache located at', main['M5_BUILD_CACHE']) CacheDir(main['M5_BUILD_CACHE']) - -# verify that this stuff works -if not conf.CheckHeader('Python.h', '<>'): - print "Error: can't find Python.h header in", py_includes - print "Install Python headers (package python-dev on Ubuntu and RedHat)" - Exit(1) - -for lib in py_libs: - if not conf.CheckLib(lib): - print "Error: can't find library %s required by python" % lib +main['USE_PYTHON'] = not GetOption('without_python') +if main['USE_PYTHON']: + # Find Python include and library directories for embedding the + # interpreter. We rely on python-config to resolve the appropriate + # includes and linker flags. ParseConfig does not seem to understand + # the more exotic linker flags such as -Xlinker and -export-dynamic so + # we add them explicitly below. If you want to link in an alternate + # version of python, see above for instructions on how to invoke + # scons with the appropriate PATH set. + # + # First we check if python2-config exists, else we use python-config + python_config = readCommand(['which', 'python2-config'], + exception='').strip() + if not os.path.exists(python_config): + python_config = readCommand(['which', 'python-config'], + exception='').strip() + py_includes = readCommand([python_config, '--includes'], + exception='').split() + # Strip the -I from the include folders before adding them to the + # CPPPATH + main.Append(CPPPATH=map(lambda inc: inc[2:], py_includes)) + + # Read the linker flags and split them into libraries and other link + # flags. The libraries are added later through the call the CheckLib. + py_ld_flags = readCommand([python_config, '--ldflags'], + exception='').split() + py_libs = [] + for lib in py_ld_flags: + if not lib.startswith('-l'): + main.Append(LINKFLAGS=[lib]) + else: + lib = lib[2:] + if lib not in py_libs: + py_libs.append(lib) + + # verify that this stuff works + if not conf.CheckHeader('Python.h', '<>'): + print("Error: Check failed for Python.h header in", py_includes) + print("Two possible reasons:") + print("1. Python headers are not installed (You can install the " + "package python-dev on Ubuntu and RedHat)") + print("2. SCons is using a wrong C compiler. This can happen if " + "CC has the wrong value.") + print("CC = %s" % main['CC']) Exit(1) + for lib in py_libs: + if not conf.CheckLib(lib): + print("Error: can't find library %s required by python" % lib) + Exit(1) + # On Solaris you need to use libsocket for socket ops if not conf.CheckLibWithHeader(None, 'sys/socket.h', 'C++', 'accept(0,0,0);'): if not conf.CheckLibWithHeader('socket', 'sys/socket.h', 'C++', 'accept(0,0,0);'): - print "Can't find library with socket calls (e.g. accept())" + print("Can't find library with socket calls (e.g. accept())") Exit(1) # Check for zlib. If the check passes, libz will be automatically # added to the LIBS environment variable. if not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'): - print 'Error: did not find needed zlib compression library '\ - 'and/or zlib.h header file.' - print ' Please install zlib and try again.' + print('Error: did not find needed zlib compression library ' + 'and/or zlib.h header file.') + print(' Please install zlib and try again.') Exit(1) +# If we have the protobuf compiler, also make sure we have the +# development libraries. If the check passes, libprotobuf will be +# automatically added to the LIBS environment variable. After +# this, we can use the HAVE_PROTOBUF flag to determine if we have +# got both protoc and libprotobuf available. +main['HAVE_PROTOBUF'] = main['PROTOC'] and \ + conf.CheckLibWithHeader('protobuf', 'google/protobuf/message.h', + 'C++', 'GOOGLE_PROTOBUF_VERIFY_VERSION;') + +# Valgrind gets much less confused if you tell it when you're using +# alternative stacks. +main['HAVE_VALGRIND'] = conf.CheckCHeader('valgrind/valgrind.h') + +# If we have the compiler but not the library, print another warning. +if main['PROTOC'] and not main['HAVE_PROTOBUF']: + print(termcap.Yellow + termcap.Bold + + 'Warning: did not find protocol buffer library and/or headers.\n' + + ' Please install libprotobuf-dev for tracing support.' + + termcap.Normal) + # Check for librt. have_posix_clock = \ conf.CheckLibWithHeader(None, 'time.h', 'C', @@ -821,23 +780,113 @@ have_posix_clock = \ conf.CheckLibWithHeader('rt', 'time.h', 'C', 'clock_nanosleep(0,0,NULL,NULL);') -if conf.CheckLib('tcmalloc_minimal'): - have_tcmalloc = True -else: - have_tcmalloc = False - print termcap.Yellow + termcap.Bold + \ - "You can get a 12% performance improvement by installing tcmalloc "\ - "(libgoogle-perftools-dev package on Ubuntu or RedHat)." + \ - termcap.Normal +have_posix_timers = \ + conf.CheckLibWithHeader([None, 'rt'], [ 'time.h', 'signal.h' ], 'C', + 'timer_create(CLOCK_MONOTONIC, NULL, NULL);') + +if not GetOption('without_tcmalloc'): + if conf.CheckLib('tcmalloc'): + main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS']) + elif conf.CheckLib('tcmalloc_minimal'): + main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS']) + else: + print(termcap.Yellow + termcap.Bold + + "You can get a 12% performance improvement by " + "installing tcmalloc (libgoogle-perftools-dev package " + "on Ubuntu or RedHat)." + termcap.Normal) + + +# Detect back trace implementations. The last implementation in the +# list will be used by default. +backtrace_impls = [ "none" ] + +backtrace_checker = 'char temp;' + \ + ' backtrace_symbols_fd((void*)&temp, 0, 0);' +if conf.CheckLibWithHeader(None, 'execinfo.h', 'C', backtrace_checker): + backtrace_impls.append("glibc") +elif conf.CheckLibWithHeader('execinfo', 'execinfo.h', 'C', + backtrace_checker): + # NetBSD and FreeBSD need libexecinfo. + backtrace_impls.append("glibc") + main.Append(LIBS=['execinfo']) + +if backtrace_impls[-1] == "none": + default_backtrace_impl = "none" + print(termcap.Yellow + termcap.Bold + + "No suitable back trace implementation found." + + termcap.Normal) if not have_posix_clock: - print "Can't find library for POSIX clocks." + print("Can't find library for POSIX clocks.") # Check for (C99 FP environment control) have_fenv = conf.CheckHeader('fenv.h', '<>') if not have_fenv: - print "Warning: Header file not found." - print " This host has no IEEE FP rounding mode control." + print("Warning: Header file not found.") + print(" This host has no IEEE FP rounding mode control.") + +# Check for (libpng library needed if wanting to dump +# frame buffer image in png format) +have_png = conf.CheckHeader('png.h', '<>') +if not have_png: + print("Warning: Header file not found.") + print(" This host has no libpng library.") + print(" Disabling support for PNG framebuffers.") + +# Check if we should enable KVM-based hardware virtualization. The API +# we rely on exists since version 2.6.36 of the kernel, but somehow +# the KVM_API_VERSION does not reflect the change. We test for one of +# the types as a fall back. +have_kvm = conf.CheckHeader('linux/kvm.h', '<>') +if not have_kvm: + print("Info: Compatible header file not found, " + "disabling KVM support.") + +# Check if the TUN/TAP driver is available. +have_tuntap = conf.CheckHeader('linux/if_tun.h', '<>') +if not have_tuntap: + print("Info: Compatible header file not found.") + +# x86 needs support for xsave. We test for the structure here since we +# won't be able to run new tests by the time we know which ISA we're +# targeting. +have_kvm_xsave = conf.CheckTypeSize('struct kvm_xsave', + '#include ') != 0 + +# Check if the requested target ISA is compatible with the host +def is_isa_kvm_compatible(isa): + try: + import platform + host_isa = platform.machine() + except: + print("Warning: Failed to determine host ISA.") + return False + + if not have_posix_timers: + print("Warning: Can not enable KVM, host seems to lack support " + "for POSIX timers") + return False + + if isa == "arm": + return host_isa in ( "armv7l", "aarch64" ) + elif isa == "x86": + if host_isa != "x86_64": + return False + + if not have_kvm_xsave: + print("KVM on x86 requires xsave support in kernel headers.") + return False + + return True + else: + return False + + +# Check if the exclude_host attribute is available. We want this to +# get accurate instruction counts in KVM. +main['HAVE_PERF_ATTR_EXCLUDE_HOST'] = conf.CheckMember( + 'linux/perf_event.h', 'struct perf_event_attr', 'exclude_host') + ###################################################################### # @@ -852,7 +901,9 @@ main = conf.Finish() # Define the universe of supported ISAs all_isa_list = [ ] +all_gpu_isa_list = [ ] Export('all_isa_list') +Export('all_gpu_isa_list') class CpuModel(object): '''The CpuModel class encapsulates everything the ISA parser needs to @@ -860,17 +911,10 @@ class CpuModel(object): # Dict of available CPU model objects. Accessible as CpuModel.dict. dict = {} - list = [] - defaults = [] # Constructor. Automatically adds models to CpuModel.dict. - def __init__(self, name, filename, includes, strings, default=False): + def __init__(self, name, default=False): self.name = name # name of model - self.filename = filename # filename for output exec code - self.includes = includes # include files needed in exec file - # The 'strings' dict holds all the per-CPU symbols we can - # substitute into templates etc. - self.strings = strings # This cpu is enabled by default self.default = default @@ -879,7 +923,6 @@ class CpuModel(object): if name in CpuModel.dict: raise AttributeError, "CpuModel '%s' already registered" % name CpuModel.dict[name] = self - CpuModel.list.append(name) Export('CpuModel') @@ -903,25 +946,27 @@ Export('slicc_includes') # Walk the tree and execute all SConsopts scripts that wil add to the # above variables -if not GetOption('verbose'): - print "Reading SConsopts" +if GetOption('verbose'): + print("Reading SConsopts") for bdir in [ base_dir ] + extras_dir_list: if not isdir(bdir): - print "Error: directory '%s' does not exist" % bdir + print("Error: directory '%s' does not exist" % bdir) Exit(1) for root, dirs, files in os.walk(bdir): if 'SConsopts' in files: if GetOption('verbose'): - print "Reading", joinpath(root, 'SConsopts') + print("Reading", joinpath(root, 'SConsopts')) SConscript(joinpath(root, 'SConsopts')) all_isa_list.sort() +all_gpu_isa_list.sort() sticky_vars.AddVariables( EnumVariable('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list), + EnumVariable('TARGET_GPU_ISA', 'Target GPU ISA', 'hsail', all_gpu_isa_list), ListVariable('CPU_MODELS', 'CPU models', sorted(n for n,m in CpuModel.dict.iteritems() if m.default), - sorted(CpuModel.list)), + sorted(CpuModel.dict.keys())), BoolVariable('EFENCE', 'Link with Electric Fence malloc debugger', False), BoolVariable('SS_COMPATIBLE_FP', @@ -932,15 +977,26 @@ sticky_vars.AddVariables( False), BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock), BoolVariable('USE_FENV', 'Use IEEE mode control', have_fenv), - BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', False), + BoolVariable('USE_PNG', 'Enable support for PNG images', have_png), + BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', + False), + BoolVariable('USE_KVM', 'Enable hardware virtualized (KVM) CPU models', + have_kvm), + BoolVariable('USE_TUNTAP', + 'Enable using a tap device to bridge to the host network', + have_tuntap), + BoolVariable('BUILD_GPU', 'Build the compute-GPU model', False), EnumVariable('PROTOCOL', 'Coherence protocol for Ruby', 'None', all_protocols), + EnumVariable('BACKTRACE_IMPL', 'Post-mortem dump implementation', + backtrace_impls[-1], backtrace_impls) ) # These variables get exported to #defines in config/*.hh (see src/SConscript). -export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP', - 'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK', 'PROTOCOL', - 'HAVE_STATIC_ASSERT'] +export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP', 'TARGET_ISA', 'TARGET_GPU_ISA', + 'CP_ANNOTATE', 'USE_POSIX_CLOCK', 'USE_KVM', 'USE_TUNTAP', + 'PROTOCOL', 'HAVE_PROTOBUF', 'HAVE_VALGRIND', + 'HAVE_PERF_ATTR_EXCLUDE_HOST', 'USE_PNG'] ################################################### # @@ -955,7 +1011,7 @@ export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP', def build_config_file(target, source, env): (variable, value) = [s.get_contents() for s in source] f = file(str(target[0]), 'w') - print >> f, '#define', variable, value + print('#define', variable, value, file=f) f.close() return None @@ -983,42 +1039,76 @@ config_builder = Builder(emitter = config_emitter, action = config_action) main.Append(BUILDERS = { 'ConfigFile' : config_builder }) -# libelf build is shared across all configs in the build root. -main.SConscript('ext/libelf/SConscript', - variant_dir = joinpath(build_root, 'libelf')) +################################################### +# +# Builders for static and shared partially linked object files. +# +################################################### -# gzstream build is shared across all configs in the build root. -main.SConscript('ext/gzstream/SConscript', - variant_dir = joinpath(build_root, 'gzstream')) +partial_static_builder = Builder(action=SCons.Defaults.LinkAction, + src_suffix='$OBJSUFFIX', + src_builder=['StaticObject', 'Object'], + LINKFLAGS='$PLINKFLAGS', + LIBS='') + +def partial_shared_emitter(target, source, env): + for tgt in target: + tgt.attributes.shared = 1 + return (target, source) +partial_shared_builder = Builder(action=SCons.Defaults.ShLinkAction, + emitter=partial_shared_emitter, + src_suffix='$SHOBJSUFFIX', + src_builder='SharedObject', + SHLINKFLAGS='$PSHLINKFLAGS', + LIBS='') + +main.Append(BUILDERS = { 'PartialShared' : partial_shared_builder, + 'PartialStatic' : partial_static_builder }) + +# builds in ext are shared across all configs in the build root. +ext_dir = abspath(joinpath(str(main.root), 'ext')) +ext_build_dirs = [] +for root, dirs, files in os.walk(ext_dir): + if 'SConscript' in files: + build_dir = os.path.relpath(root, ext_dir) + ext_build_dirs.append(build_dir) + main.SConscript(joinpath(root, 'SConscript'), + variant_dir=joinpath(build_root, build_dir)) + +main.Prepend(CPPPATH=Dir('ext/pybind11/include/')) ################################################### # -# This function is used to set up a directory with switching headers +# This builder and wrapper method are used to set up a directory with +# switching headers. Those are headers which are in a generic location and +# that include more specific headers from a directory chosen at build time +# based on the current build settings. # ################################################### -main['ALL_ISA_LIST'] = all_isa_list -def make_switching_dir(dname, switch_headers, env): - # Generate the header. target[0] is the full path of the output - # header to generate. 'source' is a dummy variable, since we get the - # list of ISAs from env['ALL_ISA_LIST']. - def gen_switch_hdr(target, source, env): - fname = str(target[0]) - f = open(fname, 'w') - isa = env['TARGET_ISA'].lower() - print >>f, '#include "%s/%s/%s"' % (dname, isa, basename(fname)) - f.close() - - # Build SCons Action object. 'varlist' specifies env vars that this - # action depends on; when env['ALL_ISA_LIST'] changes these actions - # should get re-executed. - switch_hdr_action = MakeAction(gen_switch_hdr, - Transform("GENERATE"), varlist=['ALL_ISA_LIST']) - - # Instantiate actions for each header - for hdr in switch_headers: - env.Command(hdr, [], switch_hdr_action) -Export('make_switching_dir') +def build_switching_header(target, source, env): + path = str(target[0]) + subdir = str(source[0]) + dp, fp = os.path.split(path) + dp = os.path.relpath(os.path.realpath(dp), + os.path.realpath(env['BUILDDIR'])) + with open(path, 'w') as hdr: + print('#include "%s/%s/%s"' % (dp, subdir, fp), file=hdr) + +switching_header_action = MakeAction(build_switching_header, + Transform('GENERATE')) + +switching_header_builder = Builder(action=switching_header_action, + source_factory=Value, + single_source=True) + +main.Append(BUILDERS = { 'SwitchingHeader': switching_header_builder }) + +def switching_headers(self, headers, source): + for header in headers: + self.SwitchingHeader(header, source) + +main.AddMethod(switching_headers, 'SwitchingHeaders') ################################################### # @@ -1027,7 +1117,8 @@ Export('make_switching_dir') ################################################### for variant_path in variant_paths: - print "Building in", variant_path + if not GetOption('silent'): + print("Building in", variant_path) # Make a copy of the build-root environment to use for this config. env = main.Clone() @@ -1045,7 +1136,11 @@ for variant_path in variant_paths: current_vars_file = joinpath(build_root, 'variables', variant_dir) if isfile(current_vars_file): sticky_vars.files.append(current_vars_file) - print "Using saved variables file %s" % current_vars_file + if not GetOption('silent'): + print("Using saved variables file %s" % current_vars_file) + elif variant_dir in ext_build_dirs: + # Things in ext are built without a variant directory. + continue else: # Build dir-specific variables file doesn't exist. @@ -1068,12 +1163,12 @@ for variant_path in variant_paths: if existing_files: default_vars_file = existing_files[0] sticky_vars.files.append(default_vars_file) - print "Variables file %s not found,\n using defaults in %s" \ - % (current_vars_file, default_vars_file) + print("Variables file %s not found,\n using defaults in %s" + % (current_vars_file, default_vars_file)) else: - print "Error: cannot find variables file %s or " \ - "default file(s) %s" \ - % (current_vars_file, ' or '.join(default_vars_files)) + print("Error: cannot find variables file %s or " + "default file(s) %s" + % (current_vars_file, ' or '.join(default_vars_files))) Exit(1) # Apply current variable settings to env @@ -1086,37 +1181,61 @@ for variant_path in variant_paths: # Process variable settings. if not have_fenv and env['USE_FENV']: - print "Warning: not available; " \ - "forcing USE_FENV to False in", variant_dir + "." + print("Warning: not available; " + "forcing USE_FENV to False in", variant_dir + ".") env['USE_FENV'] = False if not env['USE_FENV']: - print "Warning: No IEEE FP rounding mode control in", variant_dir + "." - print " FP results may deviate slightly from other platforms." + print("Warning: No IEEE FP rounding mode control in", + variant_dir + ".") + print(" FP results may deviate slightly from other platforms.") + + if not have_png and env['USE_PNG']: + print("Warning: not available; " + "forcing USE_PNG to False in", variant_dir + ".") + env['USE_PNG'] = False + + if env['USE_PNG']: + env.Append(LIBS=['png']) if env['EFENCE']: env.Append(LIBS=['efence']) + if env['USE_KVM']: + if not have_kvm: + print("Warning: Can not enable KVM, host seems to " + "lack KVM support") + env['USE_KVM'] = False + elif not is_isa_kvm_compatible(env['TARGET_ISA']): + print("Info: KVM support disabled due to unsupported host and " + "target ISA combination") + env['USE_KVM'] = False + + if env['USE_TUNTAP']: + if not have_tuntap: + print("Warning: Can't connect EtherTap with a tap device.") + env['USE_TUNTAP'] = False + + if env['BUILD_GPU']: + env.Append(CPPDEFINES=['BUILD_GPU']) + + # Warn about missing optional functionality + if env['USE_KVM']: + if not main['HAVE_PERF_ATTR_EXCLUDE_HOST']: + print("Warning: perf_event headers lack support for the " + "exclude_host attribute. KVM instruction counts will " + "be inaccurate.") + # Save sticky variable settings back to current variables file sticky_vars.Save(current_vars_file, env) if env['USE_SSE2']: env.Append(CCFLAGS=['-msse2']) - if have_tcmalloc: - env.Append(LIBS=['tcmalloc_minimal']) - # The src/SConscript file sets up the build rules in 'env' according # to the configured variables. It returns a list of environments, # one for each variant build (debug, opt, etc.) - envList = SConscript('src/SConscript', variant_dir = variant_path, - exports = 'env') - - # Set up the regression tests for each build. - for e in envList: - SConscript('tests/SConscript', - variant_dir = joinpath(variant_path, 'tests', e.Label), - exports = { 'env' : e }, duplicate = False) + SConscript('src/SConscript', variant_dir = variant_path, exports = 'env') # base help text Help('''