#!/usr/bin/env python
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# Copyright (C) 2014 by Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# This script generates a random configuration for testing Buildroot.
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from __future__ import print_function
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import contextlib
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import csv
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import os
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from random import randint
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import subprocess
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import sys
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from distutils.version import StrictVersion
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import platform
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if sys.hexversion >= 0x3000000:
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import urllib.request as _urllib
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else:
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import urllib2 as _urllib
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def urlopen_closing(uri):
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return contextlib.closing(_urllib.urlopen(uri))
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if sys.hexversion >= 0x3000000:
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def decode_byte_list(bl):
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return [b.decode() for b in bl]
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else:
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def decode_byte_list(e):
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return e
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class SystemInfo:
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DEFAULT_NEEDED_PROGS = ["make", "git", "gcc", "timeout"]
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DEFAULT_OPTIONAL_PROGS = ["bzr", "java", "javac", "jar"]
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def __init__(self):
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self.needed_progs = list(self.__class__.DEFAULT_NEEDED_PROGS)
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self.optional_progs = list(self.__class__.DEFAULT_OPTIONAL_PROGS)
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self.progs = {}
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def find_prog(self, name, flags=os.X_OK, env=os.environ):
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if not name or name[0] == os.sep:
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raise ValueError(name)
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prog_path = env.get("PATH", None)
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# for windows compatibility, we'd need to take PATHEXT into account
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if prog_path:
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for prog_dir in filter(None, prog_path.split(os.pathsep)):
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# os.join() not necessary: non-empty prog_dir
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# and name[0] != os.sep
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prog = prog_dir + os.sep + name
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if os.access(prog, flags):
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return prog
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# --
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return None
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def has(self, prog):
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"""Checks whether a program is available.
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Lazily evaluates missing entries.
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Returns: None if prog not found, else path to the program [evaluates
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to True]
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"""
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try:
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return self.progs[prog]
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except KeyError:
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pass
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have_it = self.find_prog(prog)
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# java[c] needs special care
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if have_it and prog in ('java', 'javac'):
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with open(os.devnull, "w") as devnull:
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if subprocess.call("%s -version | grep gcj" % prog,
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shell=True,
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stdout=devnull, stderr=devnull) != 1:
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have_it = False
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# --
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self.progs[prog] = have_it
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return have_it
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def check_requirements(self):
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"""Checks program dependencies.
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Returns: True if all mandatory programs are present, else False.
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"""
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do_check_has_prog = self.has
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missing_requirements = False
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for prog in self.needed_progs:
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if not do_check_has_prog(prog):
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print("ERROR: your system lacks the '%s' program" % prog)
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missing_requirements = True
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# check optional programs here,
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# else they'd get checked by each worker instance
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for prog in self.optional_progs:
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do_check_has_prog(prog)
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return not missing_requirements
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def get_toolchain_configs(toolchains_csv, buildrootdir):
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"""Fetch and return the possible toolchain configurations
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This function returns an array of toolchain configurations. Each
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toolchain configuration is itself an array of lines of the defconfig.
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"""
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with open(toolchains_csv) as r:
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# filter empty lines and comments
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lines = [ t for t in r.readlines() if len(t.strip()) > 0 and t[0] != '#' ]
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toolchains = decode_byte_list(lines)
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configs = []
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(_, _, _, _, hostarch) = os.uname()
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# ~2015 distros report x86 when on a 32bit install
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if hostarch == 'i686' or hostarch == 'i386' or hostarch == 'x86':
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hostarch = 'x86'
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for row in csv.reader(toolchains):
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config = {}
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configfile = row[0]
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config_hostarch = row[1]
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keep = False
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# Keep all toolchain configs that work regardless of the host
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# architecture
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if config_hostarch == "any":
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keep = True
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# Keep all toolchain configs that can work on the current host
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# architecture
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if hostarch == config_hostarch:
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keep = True
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# Assume that x86 32 bits toolchains work on x86_64 build
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# machines
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if hostarch == 'x86_64' and config_hostarch == "x86":
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keep = True
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if not keep:
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continue
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if not os.path.isabs(configfile):
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configfile = os.path.join(buildrootdir, configfile)
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with open(configfile) as r:
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config = r.readlines()
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configs.append(config)
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return configs
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def is_toolchain_usable(configfile, config):
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"""Check if the toolchain is actually usable."""
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with open(configfile) as configf:
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configlines = configf.readlines()
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# Check that the toolchain configuration is still present
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for toolchainline in config:
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if toolchainline not in configlines:
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print("WARN: toolchain can't be used", file=sys.stderr)
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print(" Missing: %s" % toolchainline.strip(), file=sys.stderr)
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return False
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# The latest Linaro toolchains on x86-64 hosts requires glibc
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# 2.14+ on the host.
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if platform.machine() == 'x86_64':
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if 'BR2_TOOLCHAIN_EXTERNAL_LINARO_ARM=y\n' in configlines or \
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'BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64=y\n' in configlines or \
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'BR2_TOOLCHAIN_EXTERNAL_LINARO_ARMEB=y\n' in configlines:
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ldd_version_output = subprocess.check_output(['ldd', '--version'])
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glibc_version = ldd_version_output.splitlines()[0].split()[-1]
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if StrictVersion('2.14') > StrictVersion(glibc_version):
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print("WARN: ignoring the Linaro ARM toolchains because too old host glibc", file=sys.stderr)
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return False
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return True
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def fixup_config(configfile):
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"""Finalize the configuration and reject any problematic combinations
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This function returns 'True' when the configuration has been
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accepted, and 'False' when the configuration has not been accepted because
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it is known to fail (in which case another random configuration will be
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generated).
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"""
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sysinfo = SystemInfo()
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with open(configfile) as configf:
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configlines = configf.readlines()
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if "BR2_NEEDS_HOST_JAVA=y\n" in configlines and not sysinfo.has("java"):
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return False
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if "BR2_NEEDS_HOST_JAVAC=y\n" in configlines and not sysinfo.has("javac"):
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return False
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if "BR2_NEEDS_HOST_JAR=y\n" in configlines and not sysinfo.has("jar"):
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return False
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# python-nfc needs bzr
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if 'BR2_PACKAGE_PYTHON_NFC=y\n' in configlines and not sysinfo.has("bzr"):
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return False
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# The ctng toolchain is affected by PR58854
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if 'BR2_PACKAGE_LTTNG_TOOLS=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/armv5-ctng-linux-gnueabi.tar.xz"\n' in configlines:
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return False
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# The ctng toolchain tigger an assembler error with guile package when compiled with -Os (same issue as for CS ARM 2014.05-29)
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if 'BR2_PACKAGE_GUILE=y\n' in configlines and \
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'BR2_OPTIMIZE_S=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/armv5-ctng-linux-gnueabi.tar.xz"\n' in configlines:
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return False
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# The ctng toolchain is affected by PR58854
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if 'BR2_PACKAGE_LTTNG_TOOLS=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/armv6-ctng-linux-uclibcgnueabi.tar.xz"\n' in configlines:
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return False
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# The ctng toolchain is affected by PR58854
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if 'BR2_PACKAGE_LTTNG_TOOLS=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/armv7-ctng-linux-gnueabihf.tar.xz"\n' in configlines:
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return False
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# The ctng toolchain is affected by PR60155
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if 'BR2_PACKAGE_SDL=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/powerpc-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# The ctng toolchain is affected by PR60155
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if 'BR2_PACKAGE_LIBMPEG2=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/powerpc-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# This MIPS toolchain uses eglibc-2.18 which lacks SYS_getdents64
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if 'BR2_PACKAGE_STRONGSWAN=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mips64el-ctng_n64-linux-gnu.tar.xz"\n' in configlines:
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return False
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# This MIPS toolchain uses eglibc-2.18 which lacks SYS_getdents64
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if 'BR2_PACKAGE_PYTHON3=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mips64el-ctng_n64-linux-gnu.tar.xz"\n' in configlines:
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return False
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# libffi not available on sh2a and ARMv7-M, but propagating libffi
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# arch dependencies in Buildroot is really too much work, so we
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# handle this here.
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if 'BR2_sh2a=y\n' in configlines and \
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'BR2_PACKAGE_LIBFFI=y\n' in configlines:
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return False
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if 'BR2_ARM_CPU_ARMV7M=y\n' in configlines and \
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'BR2_PACKAGE_LIBFFI=y\n' in configlines:
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return False
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if 'BR2_PACKAGE_SUNXI_BOARDS=y\n' in configlines:
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configlines.remove('BR2_PACKAGE_SUNXI_BOARDS_FEX_FILE=""\n')
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configlines.append('BR2_PACKAGE_SUNXI_BOARDS_FEX_FILE="a10/hackberry.fex"\n')
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# This MIPS uClibc toolchain fails to build the gdb package
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if 'BR2_PACKAGE_GDB=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mipsel-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# This MIPS uClibc toolchain fails to build the rt-tests package
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if 'BR2_PACKAGE_RT_TESTS=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mipsel-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# This MIPS uClibc toolchain fails to build the civetweb package
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if 'BR2_PACKAGE_CIVETWEB=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mipsel-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# This MIPS ctng toolchain fails to build the python3 package
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if 'BR2_PACKAGE_PYTHON3=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mips64el-ctng_n64-linux-gnu.tar.xz"\n' in configlines:
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return False
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# This MIPS uClibc toolchain fails to build the strace package
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if 'BR2_PACKAGE_STRACE=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mipsel-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# This MIPS uClibc toolchain fails to build the cdrkit package
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if 'BR2_PACKAGE_CDRKIT=y\n' in configlines and \
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'BR2_STATIC_LIBS=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mipsel-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# uClibc vfork static linking issue
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if 'BR2_PACKAGE_ALSA_LIB=y\n' in configlines and \
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'BR2_STATIC_LIBS=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/i486-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# This MIPS uClibc toolchain fails to build the weston package
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if 'BR2_PACKAGE_WESTON=y\n' in configlines and \
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'BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/mipsel-ctng-linux-uclibc.tar.xz"\n' in configlines:
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return False
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# The cs nios2 2017.02 toolchain is affected by binutils PR19405
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if 'BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII=y\n' in configlines and \
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'BR2_PACKAGE_BOOST=y\n' in configlines:
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return False
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# The cs nios2 2017.02 toolchain is affected by binutils PR19405
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if 'BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII=y\n' in configlines and \
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'BR2_PACKAGE_QT5BASE_GUI=y\n' in configlines:
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return False
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# The cs nios2 2017.02 toolchain is affected by binutils PR19405
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if 'BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII=y\n' in configlines and \
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'BR2_PACKAGE_QT_GUI_MODULE=y\n' in configlines:
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return False
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# The cs nios2 2017.02 toolchain is affected by binutils PR19405
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if 'BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII=y\n' in configlines and \
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'BR2_PACKAGE_FLANN=y\n' in configlines:
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return False
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# or1k affected by binutils PR21464
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if 'BR2_or1k=y\n' in configlines and \
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'BR2_PACKAGE_QT_GUI_MODULE=y\n' in configlines:
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return False
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with open(configfile, "w+") as configf:
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configf.writelines(configlines)
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return True
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def gen_config(args):
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"""Generate a new random configuration
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This function generates the configuration, by choosing a random
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toolchain configuration and then generating a random selection of
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packages.
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"""
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# Select a random toolchain configuration
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configs = get_toolchain_configs(args.toolchains_csv, args.buildrootdir)
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i = randint(0, len(configs) - 1)
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toolchainconfig = configs[i]
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configlines = list(toolchainconfig)
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# Combine with the minimal configuration
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minimalconfigfile = os.path.join(args.buildrootdir,
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'support/config-fragments/minimal.config')
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with open(minimalconfigfile) as minimalf:
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configlines += minimalf.readlines()
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# Amend the configuration with a few things.
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if randint(0, 20) == 0:
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configlines.append("BR2_ENABLE_DEBUG=y\n")
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if randint(0, 1) == 0:
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configlines.append("BR2_INIT_BUSYBOX=y\n")
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elif randint(0, 15) == 0:
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configlines.append("BR2_INIT_SYSTEMD=y\n")
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elif randint(0, 10) == 0:
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configlines.append("BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y\n")
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if randint(0, 20) == 0:
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configlines.append("BR2_STATIC_LIBS=y\n")
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if randint(0, 20) == 0:
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configlines.append("BR2_PACKAGE_PYTHON_PY_ONLY=y\n")
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# Write out the configuration file
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if not os.path.exists(args.outputdir):
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os.makedirs(args.outputdir)
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if args.outputdir == os.path.abspath(os.path.join(args.buildrootdir, "output")):
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configfile = os.path.join(args.buildrootdir, ".config")
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else:
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configfile = os.path.join(args.outputdir, ".config")
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with open(configfile, "w+") as configf:
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configf.writelines(configlines)
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subprocess.check_call(["make", "O=%s" % args.outputdir, "-C", args.buildrootdir,
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"olddefconfig"])
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if not is_toolchain_usable(configfile, toolchainconfig):
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return 2
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# Now, generate the random selection of packages, and fixup
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# things if needed.
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# Safe-guard, in case we can not quickly come to a valid
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# configuration: allow at most 100 (arbitrary) iterations.
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bounded_loop = 100
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while True:
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if bounded_loop == 0:
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print("ERROR: cannot generate random configuration after 100 iterations",
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file=sys.stderr)
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return 1
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bounded_loop -= 1
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subprocess.check_call(["make", "O=%s" % args.outputdir, "-C", args.buildrootdir,
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"KCONFIG_PROBABILITY=%d" % randint(1, 30),
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"randpackageconfig"])
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if fixup_config(configfile):
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break
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subprocess.check_call(["make", "O=%s" % args.outputdir, "-C", args.buildrootdir,
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"olddefconfig"])
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subprocess.check_call(["make", "O=%s" % args.outputdir, "-C", args.buildrootdir,
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"savedefconfig"])
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return subprocess.call(["make", "O=%s" % args.outputdir, "-C", args.buildrootdir,
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"core-dependencies"])
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if __name__ == '__main__':
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import argparse
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parser = argparse.ArgumentParser(description="Generate a random configuration")
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parser.add_argument("--outputdir", "-o",
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help="Output directory (relative to current directory)",
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type=str, default='output')
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parser.add_argument("--buildrootdir", "-b",
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help="Buildroot directory (relative to current directory)",
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type=str, default='.')
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parser.add_argument("--toolchains-csv",
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help="Path of the toolchain configuration file",
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type=str,
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default="support/config-fragments/autobuild/toolchain-configs.csv")
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args = parser.parse_args()
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# We need the absolute path to use with O=, because the relative
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# path to the output directory here is not relative to the
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# Buildroot sources, but to the current directory.
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args.outputdir = os.path.abspath(args.outputdir)
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try:
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ret = gen_config(args)
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except Exception as e:
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print(str(e), file=sys.stderr)
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parser.exit(1)
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parser.exit(ret)
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