scons/llvm.py

   1 """llvm
   2
   3 Tool-specific initialization for LLVM
   4
   5 """
   6
   7 #
   8 # Copyright (c) 2009 VMware, Inc.
   9 #
  10 # Permission is hereby granted, free of charge, to any person obtaining
  11 # a copy of this software and associated documentation files (the
  12 # "Software"), to deal in the Software without restriction, including
  13 # without limitation the rights to use, copy, modify, merge, publish,
  14 # distribute, sublicense, and/or sell copies of the Software, and to
  15 # permit persons to whom the Software is furnished to do so, subject to
  16 # the following conditions:
  17 #
  18 # The above copyright notice and this permission notice shall be included
  19 # in all copies or substantial portions of the Software.
  20 #
  21 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  22 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  23 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 #
  29
  30 import os
  31 import os.path
  32 import subprocess
  33
  34 import SCons.Action
  35 import SCons.Errors
  36 import SCons.Util
  37
  38
  39 def generate(env):
  40     try:
  41         llvm_dir = os.environ['LLVM']
  42     except KeyError:
  43         # Do nothing -- use the system headers/libs
  44         pass
  45     else:
  46         if not os.path.isdir(llvm_dir):
  47             raise SCons.Errors.InternalError, "Specified LLVM directory not found"
  48
  49         if env['debug']:
  50             llvm_subdir = 'Debug'
  51         else:
  52             llvm_subdir = 'Release'
  53
  54         llvm_bin_dir = os.path.join(llvm_dir, llvm_subdir, 'bin')
  55         if not os.path.isdir(llvm_bin_dir):
  56             raise SCons.Errors.InternalError, "LLVM build directory not found"
  57
  58         env.PrependENVPath('PATH', llvm_bin_dir)
  59
  60     if env.Detect('llvm-config'):
  61         pipe = SCons.Action._subproc(env,
  62                                      ['llvm-config', '--version'],
  63                                      stdin = 'devnull',
  64                                      stderr = 'devnull',
  65                                      stdout = subprocess.PIPE)
  66         if pipe.wait() != 0:
  67             return
  68         line = pipe.stdout.read().strip()
  69         if not line:
  70             return
  71         env['LLVM_VERSION'] = line
  72
  73         env.ParseConfig('llvm-config --cppflags')
  74         env.ParseConfig('llvm-config --libs jit interpreter nativecodegen bitwriter')
  75         env.ParseConfig('llvm-config --ldflags')
  76         env['LINK'] = env['CXX']
  77
  78 def exists(env):
  79     return True
  80
  81 # vim:set ts=4 sw=4 et: