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 re
  33 import sys
  34 import distutils.version
  35
  36 import SCons.Errors
  37 import SCons.Util
  38
  39
  40 def generate(env):
  41     try:
  42         llvm_dir = os.environ['LLVM']
  43     except KeyError:
  44         # Do nothing -- use the system headers/libs
  45         llvm_dir = None
  46     else:
  47         if not os.path.isdir(llvm_dir):
  48             raise SCons.Errors.InternalError, "Specified LLVM directory not found"
  49
  50         if env['debug']:
  51             llvm_subdir = 'Debug'
  52         else:
  53             llvm_subdir = 'Release'
  54
  55         llvm_bin_dir = os.path.join(llvm_dir, llvm_subdir, 'bin')
  56         if not os.path.isdir(llvm_bin_dir):
  57             llvm_bin_dir = os.path.join(llvm_dir, 'bin')
  58             if not os.path.isdir(llvm_bin_dir):
  59                 raise SCons.Errors.InternalError, "LLVM binary directory not found"
  60
  61         env.PrependENVPath('PATH', llvm_bin_dir)
  62
  63     if env['platform'] == 'windows':
  64         # XXX: There is no llvm-config on Windows, so assume a standard layout
  65         if llvm_dir is None:
  66             return
  67
  68         # Try to determine the LLVM version from llvm/Config/config.h
  69         llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/config.h')
  70         if not os.path.exists(llvm_config):
  71             print 'scons: could not find %s' % llvm_config
  72             return
  73         llvm_version_re = re.compile(r'^#define PACKAGE_VERSION "([^"]*)"')
  74         llvm_version = None
  75         for line in open(llvm_config, 'rt'):
  76             mo = llvm_version_re.match(line)
  77             if mo:
  78                 llvm_version = mo.group(1)
  79                 break
  80         if llvm_version is None:
  81             print 'scons: could not determine the LLVM version from %s' % llvm_config
  82             return
  83
  84         env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
  85         env.AppendUnique(CPPDEFINES = [
  86             '__STDC_LIMIT_MACROS',
  87             '__STDC_CONSTANT_MACROS',
  88             'HAVE_STDINT_H',
  89         ])
  90         env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
  91         if llvm_version >= distutils.version.LooseVersion('2.7'):
  92             # 2.7
  93             env.Prepend(LIBS = [
  94                 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
  95                 'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
  96                 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
  97                 'LLVMMCParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
  98                 'LLVMSelectionDAG', 'LLVMX86Info', 'LLVMAsmPrinter',
  99                 'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMInstCombine',
 100                 'LLVMTransformUtils', 'LLVMipa', 'LLVMAsmParser',
 101                 'LLVMArchive', 'LLVMBitReader', 'LLVMAnalysis', 'LLVMTarget',
 102                 'LLVMMC', 'LLVMCore', 'LLVMSupport', 'LLVMSystem',
 103             ])
 104         else:
 105             # 2.6
 106             env.Prepend(LIBS = [
 107                 'LLVMX86AsmParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
 108                 'LLVMX86Info', 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
 109                 'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
 110                 'LLVMDebugger', 'LLVMBitWriter', 'LLVMAsmParser',
 111                 'LLVMArchive', 'LLVMBitReader', 'LLVMSelectionDAG',
 112                 'LLVMAsmPrinter', 'LLVMCodeGen', 'LLVMScalarOpts',
 113                 'LLVMTransformUtils', 'LLVMipa', 'LLVMAnalysis',
 114                 'LLVMTarget', 'LLVMMC', 'LLVMCore', 'LLVMSupport',
 115                 'LLVMSystem',
 116             ])
 117         env.Append(LIBS = [
 118             'imagehlp',
 119             'psapi',
 120         ])
 121         if env['msvc']:
 122             # Some of the LLVM C headers use the inline keyword without
 123             # defining it.
 124             env.Append(CPPDEFINES = [('inline', '__inline')])
 125             if env['debug']:
 126                 # LLVM libraries are static, build with /MT, and they
 127                 # automatically link agains LIBCMT. When we're doing a
 128                 # debug build we'll be linking against LIBCMTD, so disable
 129                 # that.
 130                 env.Append(LINKFLAGS = ['/nodefaultlib:LIBCMT'])
 131     elif env.Detect('llvm-config'):
 132         llvm_version = env.backtick('llvm-config --version').rstrip()
 133
 134         try:
 135             env.ParseConfig('llvm-config --cppflags')
 136             env.ParseConfig('llvm-config --libs jit interpreter nativecodegen bitwriter')
 137             env.ParseConfig('llvm-config --ldflags')
 138         except OSError:
 139             print 'llvm-config version %s failed' % llvm_version
 140         else:
 141             env['LINK'] = env['CXX']
 142     else:
 143         return
 144
 145     assert llvm_version is not None
 146
 147     print 'scons: Found LLVM version %s' % llvm_version
 148     llvm_version = distutils.version.LooseVersion(llvm_version)
 149     env['LLVM_VERSION'] = llvm_version
 150
 151     # Define HAVE_LLVM macro with the major/minor version number (e.g., 0x0206 for 2.6)
 152     llvm_version_major = int(llvm_version.version[0])
 153     llvm_version_minor = int(llvm_version.version[1])
 154     llvm_version_hex = '0x%02x%02x' % (llvm_version_major, llvm_version_minor)
 155     env.Prepend(CPPDEFINES = [('HAVE_LLVM', llvm_version_hex)])
 156
 157 def exists(env):
 158     return True
 159
 160 # vim:set ts=4 sw=4 et: