mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-02 09:30:10 +00:00
827e37b558
The site at https://www.kernel.org/pub/tools/crosstool/ is a convenient repository of toolchains which can be used for U-Boot. Add a feature to download and install a toolchain for a selected architecture automatically. It isn't clear how long this site will stay in the current place and format, but we should be able to rely on bug reports if it changes. Suggested-by: Marek Vašut <marex@denx.de> Suggested-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Simon Glass <sjg@chromium.org>
479 lines
16 KiB
Python
479 lines
16 KiB
Python
# Copyright (c) 2012 The Chromium OS Authors.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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import re
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import glob
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from HTMLParser import HTMLParser
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import os
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import sys
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import tempfile
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import urllib2
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import bsettings
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import command
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# Simple class to collect links from a page
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class MyHTMLParser(HTMLParser):
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def __init__(self, arch):
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"""Create a new parser
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After the parser runs, self.links will be set to a list of the links
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to .xz archives found in the page, and self.arch_link will be set to
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the one for the given architecture (or None if not found).
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Args:
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arch: Architecture to search for
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"""
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HTMLParser.__init__(self)
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self.arch_link = None
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self.links = []
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self._match = '_%s-' % arch
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def handle_starttag(self, tag, attrs):
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if tag == 'a':
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for tag, value in attrs:
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if tag == 'href':
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if value and value.endswith('.xz'):
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self.links.append(value)
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if self._match in value:
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self.arch_link = value
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class Toolchain:
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"""A single toolchain
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Public members:
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gcc: Full path to C compiler
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path: Directory path containing C compiler
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cross: Cross compile string, e.g. 'arm-linux-'
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arch: Architecture of toolchain as determined from the first
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component of the filename. E.g. arm-linux-gcc becomes arm
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"""
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def __init__(self, fname, test, verbose=False):
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"""Create a new toolchain object.
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Args:
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fname: Filename of the gcc component
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test: True to run the toolchain to test it
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"""
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self.gcc = fname
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self.path = os.path.dirname(fname)
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# Find the CROSS_COMPILE prefix to use for U-Boot. For example,
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# 'arm-linux-gnueabihf-gcc' turns into 'arm-linux-gnueabihf-'.
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basename = os.path.basename(fname)
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pos = basename.rfind('-')
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self.cross = basename[:pos + 1] if pos != -1 else ''
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# The architecture is the first part of the name
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pos = self.cross.find('-')
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self.arch = self.cross[:pos] if pos != -1 else 'sandbox'
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env = self.MakeEnvironment(False)
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# As a basic sanity check, run the C compiler with --version
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cmd = [fname, '--version']
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if test:
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result = command.RunPipe([cmd], capture=True, env=env,
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raise_on_error=False)
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self.ok = result.return_code == 0
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if verbose:
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print 'Tool chain test: ',
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if self.ok:
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print 'OK'
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else:
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print 'BAD'
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print 'Command: ', cmd
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print result.stdout
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print result.stderr
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else:
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self.ok = True
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self.priority = self.GetPriority(fname)
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def GetPriority(self, fname):
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"""Return the priority of the toolchain.
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Toolchains are ranked according to their suitability by their
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filename prefix.
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Args:
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fname: Filename of toolchain
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Returns:
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Priority of toolchain, 0=highest, 20=lowest.
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"""
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priority_list = ['-elf', '-unknown-linux-gnu', '-linux',
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'-none-linux-gnueabi', '-uclinux', '-none-eabi',
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'-gentoo-linux-gnu', '-linux-gnueabi', '-le-linux', '-uclinux']
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for prio in range(len(priority_list)):
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if priority_list[prio] in fname:
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return prio
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return prio
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def MakeEnvironment(self, full_path):
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"""Returns an environment for using the toolchain.
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Thie takes the current environment and adds CROSS_COMPILE so that
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the tool chain will operate correctly.
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Args:
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full_path: Return the full path in CROSS_COMPILE and don't set
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PATH
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"""
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env = dict(os.environ)
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if full_path:
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env['CROSS_COMPILE'] = os.path.join(self.path, self.cross)
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else:
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env['CROSS_COMPILE'] = self.cross
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env['PATH'] = self.path + ':' + env['PATH']
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return env
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class Toolchains:
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"""Manage a list of toolchains for building U-Boot
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We select one toolchain for each architecture type
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Public members:
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toolchains: Dict of Toolchain objects, keyed by architecture name
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paths: List of paths to check for toolchains (may contain wildcards)
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"""
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def __init__(self):
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self.toolchains = {}
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self.paths = []
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self._make_flags = dict(bsettings.GetItems('make-flags'))
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def GetPathList(self):
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"""Get a list of available toolchain paths
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Returns:
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List of strings, each a path to a toolchain mentioned in the
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[toolchain] section of the settings file.
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"""
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toolchains = bsettings.GetItems('toolchain')
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if not toolchains:
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print ("Warning: No tool chains - please add a [toolchain] section"
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" to your buildman config file %s. See README for details" %
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bsettings.config_fname)
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paths = []
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for name, value in toolchains:
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if '*' in value:
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paths += glob.glob(value)
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else:
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paths.append(value)
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return paths
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def GetSettings(self):
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self.paths += self.GetPathList()
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def Add(self, fname, test=True, verbose=False):
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"""Add a toolchain to our list
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We select the given toolchain as our preferred one for its
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architecture if it is a higher priority than the others.
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Args:
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fname: Filename of toolchain's gcc driver
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test: True to run the toolchain to test it
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"""
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toolchain = Toolchain(fname, test, verbose)
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add_it = toolchain.ok
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if toolchain.arch in self.toolchains:
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add_it = (toolchain.priority <
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self.toolchains[toolchain.arch].priority)
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if add_it:
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self.toolchains[toolchain.arch] = toolchain
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def ScanPath(self, path, verbose):
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"""Scan a path for a valid toolchain
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Args:
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path: Path to scan
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verbose: True to print out progress information
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Returns:
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Filename of C compiler if found, else None
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"""
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for subdir in ['.', 'bin', 'usr/bin']:
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dirname = os.path.join(path, subdir)
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if verbose: print " - looking in '%s'" % dirname
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for fname in glob.glob(dirname + '/*gcc'):
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if verbose: print " - found '%s'" % fname
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return fname
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return None
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def Scan(self, verbose):
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"""Scan for available toolchains and select the best for each arch.
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We look for all the toolchains we can file, figure out the
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architecture for each, and whether it works. Then we select the
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highest priority toolchain for each arch.
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Args:
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verbose: True to print out progress information
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"""
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if verbose: print 'Scanning for tool chains'
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for path in self.paths:
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if verbose: print " - scanning path '%s'" % path
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fname = self.ScanPath(path, verbose)
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if fname:
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self.Add(fname, True, verbose)
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def List(self):
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"""List out the selected toolchains for each architecture"""
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print 'List of available toolchains (%d):' % len(self.toolchains)
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if len(self.toolchains):
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for key, value in sorted(self.toolchains.iteritems()):
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print '%-10s: %s' % (key, value.gcc)
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else:
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print 'None'
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def Select(self, arch):
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"""Returns the toolchain for a given architecture
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Args:
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args: Name of architecture (e.g. 'arm', 'ppc_8xx')
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returns:
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toolchain object, or None if none found
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"""
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for tag, value in bsettings.GetItems('toolchain-alias'):
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if arch == tag:
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for alias in value.split():
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if alias in self.toolchains:
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return self.toolchains[alias]
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if not arch in self.toolchains:
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raise ValueError, ("No tool chain found for arch '%s'" % arch)
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return self.toolchains[arch]
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def ResolveReferences(self, var_dict, args):
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"""Resolve variable references in a string
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This converts ${blah} within the string to the value of blah.
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This function works recursively.
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Args:
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var_dict: Dictionary containing variables and their values
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args: String containing make arguments
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Returns:
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Resolved string
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>>> bsettings.Setup()
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>>> tcs = Toolchains()
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>>> tcs.Add('fred', False)
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>>> var_dict = {'oblique' : 'OBLIQUE', 'first' : 'fi${second}rst', \
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'second' : '2nd'}
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>>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set')
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'this=OBLIQUE_set'
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>>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set${first}nd')
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'this=OBLIQUE_setfi2ndrstnd'
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"""
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re_var = re.compile('(\$\{[-_a-z0-9A-Z]{1,}\})')
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while True:
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m = re_var.search(args)
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if not m:
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break
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lookup = m.group(0)[2:-1]
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value = var_dict.get(lookup, '')
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args = args[:m.start(0)] + value + args[m.end(0):]
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return args
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def GetMakeArguments(self, board):
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"""Returns 'make' arguments for a given board
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The flags are in a section called 'make-flags'. Flags are named
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after the target they represent, for example snapper9260=TESTING=1
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will pass TESTING=1 to make when building the snapper9260 board.
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References to other boards can be added in the string also. For
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example:
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[make-flags]
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at91-boards=ENABLE_AT91_TEST=1
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snapper9260=${at91-boards} BUILD_TAG=442
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snapper9g45=${at91-boards} BUILD_TAG=443
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This will return 'ENABLE_AT91_TEST=1 BUILD_TAG=442' for snapper9260
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and 'ENABLE_AT91_TEST=1 BUILD_TAG=443' for snapper9g45.
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A special 'target' variable is set to the board target.
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Args:
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board: Board object for the board to check.
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Returns:
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'make' flags for that board, or '' if none
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"""
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self._make_flags['target'] = board.target
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arg_str = self.ResolveReferences(self._make_flags,
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self._make_flags.get(board.target, ''))
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args = arg_str.split(' ')
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i = 0
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while i < len(args):
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if not args[i]:
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del args[i]
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else:
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i += 1
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return args
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def LocateArchUrl(self, fetch_arch):
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"""Find a toolchain available online
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Look in standard places for available toolchains. At present the
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only standard place is at kernel.org.
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Args:
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arch: Architecture to look for, or 'list' for all
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Returns:
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If fetch_arch is 'list', a tuple:
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Machine architecture (e.g. x86_64)
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List of toolchains
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else
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URL containing this toolchain, if avaialble, else None
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"""
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arch = command.OutputOneLine('uname', '-m')
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base = 'https://www.kernel.org/pub/tools/crosstool/files/bin'
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versions = ['4.6.3', '4.6.2', '4.5.1', '4.2.4']
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links = []
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for version in versions:
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url = '%s/%s/%s/' % (base, arch, version)
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print 'Checking: %s' % url
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response = urllib2.urlopen(url)
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html = response.read()
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parser = MyHTMLParser(fetch_arch)
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parser.feed(html)
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if fetch_arch == 'list':
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links += parser.links
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elif parser.arch_link:
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return url + parser.arch_link
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if fetch_arch == 'list':
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return arch, links
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return None
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def Download(self, url):
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"""Download a file to a temporary directory
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Args:
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url: URL to download
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Returns:
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Tuple:
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Temporary directory name
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Full path to the downloaded archive file in that directory,
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or None if there was an error while downloading
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"""
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print "Downloading: %s" % url
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leaf = url.split('/')[-1]
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tmpdir = tempfile.mkdtemp('.buildman')
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response = urllib2.urlopen(url)
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fname = os.path.join(tmpdir, leaf)
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fd = open(fname, 'wb')
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meta = response.info()
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size = int(meta.getheaders("Content-Length")[0])
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done = 0
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block_size = 1 << 16
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status = ''
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# Read the file in chunks and show progress as we go
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while True:
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buffer = response.read(block_size)
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if not buffer:
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print chr(8) * (len(status) + 1), '\r',
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break
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done += len(buffer)
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fd.write(buffer)
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status = r"%10d MiB [%3d%%]" % (done / 1024 / 1024,
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done * 100 / size)
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status = status + chr(8) * (len(status) + 1)
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print status,
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sys.stdout.flush()
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fd.close()
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if done != size:
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print 'Error, failed to download'
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os.remove(fname)
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fname = None
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return tmpdir, fname
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def Unpack(self, fname, dest):
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"""Unpack a tar file
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Args:
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fname: Filename to unpack
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dest: Destination directory
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Returns:
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Directory name of the first entry in the archive, without the
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trailing /
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"""
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stdout = command.Output('tar', 'xvfJ', fname, '-C', dest)
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return stdout.splitlines()[0][:-1]
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def TestSettingsHasPath(self, path):
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"""Check if builmand will find this toolchain
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Returns:
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True if the path is in settings, False if not
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"""
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paths = self.GetPathList()
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return path in paths
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def ListArchs(self):
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"""List architectures with available toolchains to download"""
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host_arch, archives = self.LocateArchUrl('list')
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re_arch = re.compile('[-a-z0-9.]*_([^-]*)-.*')
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arch_set = set()
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for archive in archives:
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# Remove the host architecture from the start
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arch = re_arch.match(archive[len(host_arch):])
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if arch:
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arch_set.add(arch.group(1))
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return sorted(arch_set)
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def FetchAndInstall(self, arch):
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"""Fetch and install a new toolchain
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arch:
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Architecture to fetch, or 'list' to list
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"""
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# Fist get the URL for this architecture
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url = self.LocateArchUrl(arch)
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if not url:
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print ("Cannot find toolchain for arch '%s' - use 'list' to list" %
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arch)
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return 2
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home = os.environ['HOME']
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dest = os.path.join(home, '.buildman-toolchains')
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if not os.path.exists(dest):
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os.mkdir(dest)
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# Download the tar file for this toolchain and unpack it
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tmpdir, tarfile = self.Download(url)
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if not tarfile:
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return 1
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print 'Unpacking to: %s' % dest,
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sys.stdout.flush()
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path = self.Unpack(tarfile, dest)
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os.remove(tarfile)
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os.rmdir(tmpdir)
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print
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# Check that the toolchain works
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print 'Testing'
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dirpath = os.path.join(dest, path)
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compiler_fname = self.ScanPath(dirpath, True)
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if not compiler_fname:
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print 'Could not locate C compiler - fetch failed.'
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return 1
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toolchain = Toolchain(compiler_fname, True, True)
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# Make sure that it will be found by buildman
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if not self.TestSettingsHasPath(dirpath):
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print ("Adding 'download' to config file '%s'" %
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bsettings.config_fname)
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tools_dir = os.path.dirname(dirpath)
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bsettings.SetItem('toolchain', 'download', '%s/*' % tools_dir)
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return 0
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