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             print 'scons: LLVM environment variable must be specified when building for windows'
  67             env.Exit(1)
  68
  69         # Try to determine the LLVM version from llvm/Config/config.h
  70         llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/config.h')
  71         if not os.path.exists(llvm_config):
  72             print 'scons: could not find %s' % llvm_config
  73             env.Exit(1)
  74         llvm_version_re = re.compile(r'^#define PACKAGE_VERSION "([^"]*)"')
  75         llvm_version = None
  76         for line in open(llvm_config, 'rt'):
  77             mo = llvm_version_re.match(line)
  78             if mo:
  79                 llvm_version = mo.group(1)
  80                 llvm_version = distutils.version.LooseVersion(llvm_version)
  81                 break
  82         if llvm_version is None:
  83             print 'scons: could not determine the LLVM version from %s' % llvm_config
  84             env.Exit(1)
  85
  86         env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
  87         env.AppendUnique(CPPDEFINES = [
  88             '__STDC_LIMIT_MACROS',
  89             '__STDC_CONSTANT_MACROS',
  90             'HAVE_STDINT_H',
  91         ])
  92         env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
  93         if llvm_version >= distutils.version.LooseVersion('2.7'):
  94             # 2.7
  95             env.Prepend(LIBS = [
  96                 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
  97                 'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
  98                 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
  99                 'LLVMMCParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
 100                 'LLVMSelectionDAG', 'LLVMX86Info', 'LLVMAsmPrinter',
 101                 'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMInstCombine',
 102                 'LLVMTransformUtils', 'LLVMipa', 'LLVMAsmParser',
 103                 'LLVMArchive', 'LLVMBitReader', 'LLVMAnalysis', 'LLVMTarget',
 104                 'LLVMMC', 'LLVMCore', 'LLVMSupport', 'LLVMSystem',
 105             ])
 106         else:
 107             # 2.6
 108             env.Prepend(LIBS = [
 109                 'LLVMX86AsmParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
 110                 'LLVMX86Info', 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
 111                 'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
 112                 'LLVMDebugger', 'LLVMBitWriter', 'LLVMAsmParser',
 113                 'LLVMArchive', 'LLVMBitReader', 'LLVMSelectionDAG',
 114                 'LLVMAsmPrinter', 'LLVMCodeGen', 'LLVMScalarOpts',
 115                 'LLVMTransformUtils', 'LLVMipa', 'LLVMAnalysis',
 116                 'LLVMTarget', 'LLVMMC', 'LLVMCore', 'LLVMSupport',
 117                 'LLVMSystem',
 118             ])
 119         env.Append(LIBS = [
 120             'imagehlp',
 121             'psapi',
 122         ])
 123         if env['msvc']:
 124             # Some of the LLVM C headers use the inline keyword without
 125             # defining it.
 126             env.Append(CPPDEFINES = [('inline', '__inline')])
 127             if env['debug']:
 128                 # LLVM libraries are static, build with /MT, and they
 129                 # automatically link agains LIBCMT. When we're doing a
 130                 # debug build we'll be linking against LIBCMTD, so disable
 131                 # that.
 132                 env.Append(LINKFLAGS = ['/nodefaultlib:LIBCMT'])
 133     else:
 134         if not env.Detect('llvm-config'):
 135             print 'scons: llvm-config script not found' % llvm_version
 136             env.Exit(1)
 137
 138         llvm_version = env.backtick('llvm-config --version').rstrip()
 139         llvm_version = distutils.version.LooseVersion(llvm_version)
 140
 141         try:
 142             env.ParseConfig('llvm-config --cppflags')
 143             env.ParseConfig('llvm-config --libs jit interpreter nativecodegen bitwriter')
 144             env.ParseConfig('llvm-config --ldflags')
 145         except OSError:
 146             print 'scons: llvm-config version %s failed' % llvm_version
 147             env.Exit(1)
 148         else:
 149             env['LINK'] = env['CXX']
 150
 151     assert llvm_version is not None
 152
 153     print 'scons: Found LLVM version %s' % llvm_version
 154     env['LLVM_VERSION'] = llvm_version
 155
 156     # Define HAVE_LLVM macro with the major/minor version number (e.g., 0x0206 for 2.6)
 157     llvm_version_major = int(llvm_version.version[0])
 158     llvm_version_minor = int(llvm_version.version[1])
 159     llvm_version_hex = '0x%02x%02x' % (llvm_version_major, llvm_version_minor)
 160     env.Prepend(CPPDEFINES = [('HAVE_LLVM', llvm_version_hex)])
 161
 162 def exists(env):
 163     return True
 164
 165 # vim:set ts=4 sw=4 et: