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     env['llvm'] = False
  42
  43     try:
  44         llvm_dir = os.environ['LLVM']
  45     except KeyError:
  46         # Do nothing -- use the system headers/libs
  47         llvm_dir = None
  48     else:
  49         if not os.path.isdir(llvm_dir):
  50             raise SCons.Errors.InternalError, "Specified LLVM directory not found"
  51
  52         if env['debug']:
  53             llvm_subdir = 'Debug'
  54         else:
  55             llvm_subdir = 'Release'
  56
  57         llvm_bin_dir = os.path.join(llvm_dir, llvm_subdir, 'bin')
  58         if not os.path.isdir(llvm_bin_dir):
  59             llvm_bin_dir = os.path.join(llvm_dir, 'bin')
  60             if not os.path.isdir(llvm_bin_dir):
  61                 raise SCons.Errors.InternalError, "LLVM binary directory not found"
  62
  63         env.PrependENVPath('PATH', llvm_bin_dir)
  64
  65     if env['platform'] == 'windows':
  66         # XXX: There is no llvm-config on Windows, so assume a standard layout
  67         if llvm_dir is None:
  68             print 'scons: LLVM environment variable must be specified when building for windows'
  69             return
  70
  71         # Try to determine the LLVM version from llvm/Config/config.h
  72         llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/config.h')
  73         if not os.path.exists(llvm_config):
  74             print 'scons: could not find %s' % llvm_config
  75             return
  76         llvm_version_re = re.compile(r'^#define PACKAGE_VERSION "([^"]*)"')
  77         llvm_version = None
  78         for line in open(llvm_config, 'rt'):
  79             mo = llvm_version_re.match(line)
  80             if mo:
  81                 llvm_version = mo.group(1)
  82                 llvm_version = distutils.version.LooseVersion(llvm_version)
  83                 break
  84         if llvm_version is None:
  85             print 'scons: could not determine the LLVM version from %s' % llvm_config
  86             return
  87
  88         env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
  89         env.AppendUnique(CPPDEFINES = [
  90             '__STDC_LIMIT_MACROS',
  91             '__STDC_CONSTANT_MACROS',
  92             'HAVE_STDINT_H',
  93         ])
  94         env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
  95         if llvm_version >= distutils.version.LooseVersion('2.7'):
  96             # 2.7
  97             env.Prepend(LIBS = [
  98                 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
  99                 'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
 100                 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
 101                 'LLVMMCParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
 102                 'LLVMSelectionDAG', 'LLVMX86Info', 'LLVMAsmPrinter',
 103                 'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMInstCombine',
 104                 'LLVMTransformUtils', 'LLVMipa', 'LLVMAsmParser',
 105                 'LLVMArchive', 'LLVMBitReader', 'LLVMAnalysis', 'LLVMTarget',
 106                 'LLVMMC', 'LLVMCore', 'LLVMSupport', 'LLVMSystem',
 107             ])
 108         else:
 109             # 2.6
 110             env.Prepend(LIBS = [
 111                 'LLVMX86AsmParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
 112                 'LLVMX86Info', 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
 113                 'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
 114                 'LLVMDebugger', 'LLVMBitWriter', 'LLVMAsmParser',
 115                 'LLVMArchive', 'LLVMBitReader', 'LLVMSelectionDAG',
 116                 'LLVMAsmPrinter', 'LLVMCodeGen', 'LLVMScalarOpts',
 117                 'LLVMTransformUtils', 'LLVMipa', 'LLVMAnalysis',
 118                 'LLVMTarget', 'LLVMMC', 'LLVMCore', 'LLVMSupport',
 119                 'LLVMSystem',
 120             ])
 121         env.Append(LIBS = [
 122             'imagehlp',
 123             'psapi',
 124         ])
 125         if env['msvc']:
 126             # Some of the LLVM C headers use the inline keyword without
 127             # defining it.
 128             env.Append(CPPDEFINES = [('inline', '__inline')])
 129             if env['build'] in ('debug', 'checked'):
 130                 # LLVM libraries are static, build with /MT, and they
 131                 # automatically link agains LIBCMT. When we're doing a
 132                 # debug build we'll be linking against LIBCMTD, so disable
 133                 # that.
 134                 env.Append(LINKFLAGS = ['/nodefaultlib:LIBCMT'])
 135     else:
 136         if not env.Detect('llvm-config'):
 137             print 'scons: llvm-config script not found' % llvm_version
 138             return
 139
 140         llvm_version = env.backtick('llvm-config --version').rstrip()
 141         llvm_version = distutils.version.LooseVersion(llvm_version)
 142
 143         try:
 144             env.ParseConfig('llvm-config --cppflags')
 145             env.ParseConfig('llvm-config --libs jit interpreter nativecodegen bitwriter')
 146             env.ParseConfig('llvm-config --ldflags')
 147         except OSError:
 148             print 'scons: llvm-config version %s failed' % llvm_version
 149             return
 150         else:
 151             env['LINK'] = env['CXX']
 152
 153     assert llvm_version is not None
 154     env['llvm'] = True
 155
 156     print 'scons: Found LLVM version %s' % llvm_version
 157     env['LLVM_VERSION'] = llvm_version
 158
 159     # Define HAVE_LLVM macro with the major/minor version number (e.g., 0x0206 for 2.6)
 160     llvm_version_major = int(llvm_version.version[0])
 161     llvm_version_minor = int(llvm_version.version[1])
 162     llvm_version_hex = '0x%02x%02x' % (llvm_version_major, llvm_version_minor)
 163     env.Prepend(CPPDEFINES = [('HAVE_LLVM', llvm_version_hex)])
 164
 165 def exists(env):
 166     return True
 167
 168 # vim:set ts=4 sw=4 et: