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Diffstat (limited to 'qemu/roms/u-boot/tools/buildman/toolchain.py')
| -rw-r--r-- | qemu/roms/u-boot/tools/buildman/toolchain.py | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/tools/buildman/toolchain.py b/qemu/roms/u-boot/tools/buildman/toolchain.py new file mode 100644 index 000000000..b64338680 --- /dev/null +++ b/qemu/roms/u-boot/tools/buildman/toolchain.py @@ -0,0 +1,247 @@ +# 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 |