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      1 # Copyright 2008 the V8 project authors. All rights reserved.
      2 # Redistribution and use in source and binary forms, with or without
      3 # modification, are permitted provided that the following conditions are
      4 # met:
      5 #
      6 #     * Redistributions of source code must retain the above copyright
      7 #       notice, this list of conditions and the following disclaimer.
      8 #     * Redistributions in binary form must reproduce the above
      9 #       copyright notice, this list of conditions and the following
     10 #       disclaimer in the documentation and/or other materials provided
     11 #       with the distribution.
     12 #     * Neither the name of Google Inc. nor the names of its
     13 #       contributors may be used to endorse or promote products derived
     14 #       from this software without specific prior written permission.
     15 #
     16 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 
     29 import platform
     30 import re
     31 
     32 
     33 # Reads a .list file into an array of strings
     34 def ReadLinesFrom(name):
     35   list = []
     36   for line in open(name):
     37     if '#' in line:
     38       line = line[:line.find('#')]
     39     line = line.strip()
     40     if len(line) == 0:
     41       continue
     42     list.append(line)
     43   return list
     44 
     45 
     46 def GuessOS():
     47   id = platform.system()
     48   if id == 'Linux':
     49     return 'linux'
     50   elif id == 'Darwin':
     51     return 'macos'
     52   elif id.find('CYGWIN') >= 0:
     53     return 'cygwin'
     54   elif id == 'Windows' or id == 'Microsoft':
     55     # On Windows Vista platform.system() can return 'Microsoft' with some
     56     # versions of Python, see http://bugs.python.org/issue1082
     57     return 'win32'
     58   elif id == 'FreeBSD':
     59     return 'freebsd'
     60   elif id == 'OpenBSD':
     61     return 'openbsd'
     62   elif id == 'SunOS':
     63     return 'solaris'
     64   elif id == 'NetBSD':
     65     return 'netbsd'
     66   else:
     67     return None
     68 
     69 
     70 # This will default to building the 32 bit VM even on machines that are capable
     71 # of running the 64 bit VM.  Use the scons option --arch=x64 to force it to build
     72 # the 64 bit VM.
     73 def GuessArchitecture():
     74   id = platform.machine()
     75   id = id.lower()  # Windows 7 capitalizes 'AMD64'.
     76   if id.startswith('arm'):
     77     return 'arm'
     78   elif (not id) or (not re.match('(x|i[3-6])86$', id) is None):
     79     return 'ia32'
     80   elif id == 'i86pc':
     81     return 'ia32'
     82   elif id == 'x86_64':
     83     return 'ia32'
     84   elif id == 'amd64':
     85     return 'ia32'
     86   else:
     87     return None
     88 
     89 
     90 def GuessWordsize():
     91   if '64' in platform.machine():
     92     return '64'
     93   else:
     94     return '32'
     95 
     96 
     97 def IsWindows():
     98   return GuessOS() == 'win32'
     99