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# Copyright (c) 2012 The Chromium OS Authors.
#
# SPDX-License-Identifier: GPL-2.0+
#
import re
import glob
import os
import bsettings
import command
class Toolchain:
"""A single toolchain
Public members:
gcc: Full path to C compiler
path: Directory path containing C compiler
cross: Cross compile string, e.g. 'arm-linux-'
arch: Architecture of toolchain as determined from the first
component of the filename. E.g. arm-linux-gcc becomes arm
"""
def __init__(self, fname, test, verbose=False):
"""Create a new toolchain object.
Args:
fname: Filename of the gcc component
test: True to run the toolchain to test it
"""
self.gcc = fname
self.path = os.path.dirname(fname)
self.cross = os.path.basename(fname)[:-3]
pos = self.cross.find('-')
self.arch = self.cross[:pos] if pos != -1 else 'sandbox'
env = self.MakeEnvironment()
# As a basic sanity check, run the C compiler with --version
cmd = [fname, '--version']
if test:
result = command.RunPipe([cmd], capture=True, env=env,
raise_on_error=False)
self.ok = result.return_code == 0
if verbose:
print 'Tool chain test: ',
if self.ok:
print 'OK'
else:
print 'BAD'
print 'Command: ', cmd
print result.stdout
print result.stderr
else:
self.ok = True
self.priority = self.GetPriority(fname)
def GetPriority(self, fname):
"""Return the priority of the toolchain.
Toolchains are ranked according to their suitability by their
filename prefix.
Args:
fname: Filename of toolchain
Returns:
Priority of toolchain, 0=highest, 20=lowest.
"""
priority_list = ['-elf', '-unknown-linux-gnu', '-linux', '-elf',
'-none-linux-gnueabi', '-uclinux', '-none-eabi',
'-gentoo-linux-gnu', '-linux-gnueabi', '-le-linux', '-uclinux']
for prio in range(len(priority_list)):
if priority_list[prio] in fname:
return prio
return prio
def MakeEnvironment(self):
"""Returns an environment for using the toolchain.
Thie takes the current environment, adds CROSS_COMPILE and
augments PATH so that the toolchain will operate correctly.
"""
env = dict(os.environ)
env['CROSS_COMPILE'] = self.cross
env['PATH'] += (':' + self.path)
return env
class Toolchains:
"""Manage a list of toolchains for building U-Boot
We select one toolchain for each architecture type
Public members:
toolchains: Dict of Toolchain objects, keyed by architecture name
paths: List of paths to check for toolchains (may contain wildcards)
"""
def __init__(self):
self.toolchains = {}
self.paths = []
toolchains = bsettings.GetItems('toolchain')
if not toolchains:
print ("Warning: No tool chains - please add a [toolchain] section"
" to your buildman config file %s. See README for details" %
config_fname)
for name, value in toolchains:
if '*' in value:
self.paths += glob.glob(value)
else:
self.paths.append(value)
self._make_flags = dict(bsettings.GetItems('make-flags'))
def Add(self, fname, test=True, verbose=False):
"""Add a toolchain to our list
We select the given toolchain as our preferred one for its
architecture if it is a higher priority than the others.
Args:
fname: Filename of toolchain's gcc driver
test: True to run the toolchain to test it
"""
toolchain = Toolchain(fname, test, verbose)
add_it = toolchain.ok
if toolchain.arch in self.toolchains:
add_it = (toolchain.priority <
self.toolchains[toolchain.arch].priority)
if add_it:
self.toolchains[toolchain.arch] = toolchain
def Scan(self, verbose):
"""Scan for available toolchains and select the best for each arch.
We look for all the toolchains we can file, figure out the
architecture for each, and whether it works. Then we select the
highest priority toolchain for each arch.
Args:
verbose: True to print out progress information
"""
if verbose: print 'Scanning for tool chains'
for path in self.paths:
if verbose: print " - scanning path '%s'" % path
for subdir in ['.', 'bin', 'usr/bin']:
dirname = os.path.join(path, subdir)
if verbose: print " - looking in '%s'" % dirname
for fname in glob.glob(dirname + '/*gcc'):
if verbose: print " - found '%s'" % fname
self.Add(fname, True, verbose)
def List(self):
"""List out the selected toolchains for each architecture"""
print 'List of available toolchains (%d):' % len(self.toolchains)
if len(self.toolchains):
for key, value in sorted(self.toolchains.iteritems()):
print '%-10s: %s' % (key, value.gcc)
else:
print 'None'
def Select(self, arch):
"""Returns the toolchain for a given architecture
Args:
args: Name of architecture (e.g. 'arm', 'ppc_8xx')
returns:
toolchain object, or None if none found
"""
for name, value in bsettings.GetItems('toolchain-alias'):
if arch == name:
arch = value
if not arch in self.toolchains:
raise ValueError, ("No tool chain found for arch '%s'" % arch)
return self.toolchains[arch]
def ResolveReferences(self, var_dict, args):
"""Resolve variable references in a string
This converts ${blah} within the string to the value of blah.
This function works recursively.
Args:
var_dict: Dictionary containing variables and their values
args: String containing make arguments
Returns:
Resolved string
>>> bsettings.Setup()
>>> tcs = Toolchains()
>>> tcs.Add('fred', False)
>>> var_dict = {'oblique' : 'OBLIQUE', 'first' : 'fi${second}rst', \
'second' : '2nd'}
>>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set')
'this=OBLIQUE_set'
>>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set${first}nd')
'this=OBLIQUE_setfi2ndrstnd'
"""
re_var = re.compile('(\$\{[a-z0-9A-Z]{1,}\})')
while True:
m = re_var.search(args)
if not m:
break
lookup = m.group(0)[2:-1]
value = var_dict.get(lookup, '')
args = args[:m.start(0)] + value + args[m.end(0):]
return args
def GetMakeArguments(self, board):
"""Returns 'make' arguments for a given board
The flags are in a section called 'make-flags'. Flags are named
after the target they represent, for example snapper9260=TESTING=1
will pass TESTING=1 to make when building the snapper9260 board.
References to other boards can be added in the string also. For
example:
[make-flags]
at91-boards=ENABLE_AT91_TEST=1
snapper9260=${at91-boards} BUILD_TAG=442
snapper9g45=${at91-boards} BUILD_TAG=443
This will return 'ENABLE_AT91_TEST=1 BUILD_TAG=442' for snapper9260
and 'ENABLE_AT91_TEST=1 BUILD_TAG=443' for snapper9g45.
A special 'target' variable is set to the board target.
Args:
board: Board object for the board to check.
Returns:
'make' flags for that board, or '' if none
"""
self._make_flags['target'] = board.target
arg_str = self.ResolveReferences(self._make_flags,
self._make_flags.get(board.target, ''))
args = arg_str.split(' ')
i = 0
while i < len(args):
if not args[i]:
del args[i]
else:
i += 1
return args
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