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"""llvm
Tool-specific initialization for LLVM
"""
#
# Copyright (c) 2009 VMware, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
import os
import os.path
import re
import sys
import distutils.version
import SCons.Errors
import SCons.Util
required_llvm_version = '3.3'
def generate(env):
env['llvm'] = False
try:
llvm_dir = os.environ['LLVM']
except KeyError:
# Do nothing -- use the system headers/libs
llvm_dir = None
else:
if not os.path.isdir(llvm_dir):
raise SCons.Errors.InternalError, "Specified LLVM directory not found"
if env['debug']:
llvm_subdir = 'Debug'
else:
llvm_subdir = 'Release'
llvm_bin_dir = os.path.join(llvm_dir, llvm_subdir, 'bin')
if not os.path.isdir(llvm_bin_dir):
llvm_bin_dir = os.path.join(llvm_dir, 'bin')
if not os.path.isdir(llvm_bin_dir):
raise SCons.Errors.InternalError, "LLVM binary directory not found"
env.PrependENVPath('PATH', llvm_bin_dir)
if env['platform'] == 'windows':
# XXX: There is no llvm-config on Windows, so assume a standard layout
if llvm_dir is None:
print 'scons: LLVM environment variable must be specified when building for windows'
return
# Try to determine the LLVM version from llvm/Config/config.h
llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/config.h')
if not os.path.exists(llvm_config):
print 'scons: could not find %s' % llvm_config
return
llvm_version_re = re.compile(r'^#define PACKAGE_VERSION "([^"]*)"')
llvm_version = None
for line in open(llvm_config, 'rt'):
mo = llvm_version_re.match(line)
if mo:
llvm_version = mo.group(1)
llvm_version = distutils.version.LooseVersion(llvm_version)
break
if llvm_version is None:
print 'scons: could not determine the LLVM version from %s' % llvm_config
return
if llvm_version < distutils.version.LooseVersion(required_llvm_version):
print 'scons: LLVM version %s found, but %s is required' % (llvm_version, required_llvm_version)
return
env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
env.AppendUnique(CPPDEFINES = [
'__STDC_LIMIT_MACROS',
'__STDC_CONSTANT_MACROS',
'HAVE_STDINT_H',
])
env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
if True:
# 3.2
env.Prepend(LIBS = [
'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
'LLVMX86CodeGen', 'LLVMX86Desc', 'LLVMSelectionDAG',
'LLVMAsmPrinter', 'LLVMMCParser', 'LLVMX86AsmPrinter',
'LLVMX86Utils', 'LLVMX86Info', 'LLVMMCJIT', 'LLVMJIT',
'LLVMExecutionEngine', 'LLVMCodeGen', 'LLVMScalarOpts',
'LLVMInstCombine', 'LLVMTransformUtils', 'LLVMipa',
'LLVMAnalysis', 'LLVMTarget', 'LLVMMC', 'LLVMCore',
'LLVMSupport', 'LLVMRuntimeDyld', 'LLVMObject'
])
env.Append(LIBS = [
'imagehlp',
'psapi',
'shell32',
'advapi32'
])
if env['msvc']:
# Some of the LLVM C headers use the inline keyword without
# defining it.
env.Append(CPPDEFINES = [('inline', '__inline')])
if env['build'] in ('debug', 'checked'):
# LLVM libraries are static, build with /MT, and they
# automatically link agains LIBCMT. When we're doing a
# debug build we'll be linking against LIBCMTD, so disable
# that.
env.Append(LINKFLAGS = ['/nodefaultlib:LIBCMT'])
else:
if not env.Detect('llvm-config'):
print 'scons: llvm-config script not found'
return
llvm_version = env.backtick('llvm-config --version').rstrip()
llvm_version = distutils.version.LooseVersion(llvm_version)
if llvm_version < distutils.version.LooseVersion(required_llvm_version):
print 'scons: LLVM version %s found, but %s is required' % (llvm_version, required_llvm_version)
return
try:
# Treat --cppflags specially to prevent NDEBUG from disabling
# assertion failures in debug builds.
cppflags = env.ParseFlags('!llvm-config --cppflags')
try:
cppflags['CPPDEFINES'].remove('NDEBUG')
except ValueError:
pass
env.MergeFlags(cppflags)
# Match llvm --fno-rtti flag
cxxflags = env.backtick('llvm-config --cxxflags').split()
if '-fno-rtti' in cxxflags:
env.Append(CXXFLAGS = ['-fno-rtti'])
components = ['engine', 'mcjit', 'bitwriter', 'x86asmprinter']
env.ParseConfig('llvm-config --libs ' + ' '.join(components))
env.ParseConfig('llvm-config --ldflags')
if llvm_version >= distutils.version.LooseVersion('3.5'):
env.ParseConfig('llvm-config --system-libs')
env.Append(CXXFLAGS = ['-std=c++11'])
except OSError:
print 'scons: llvm-config version %s failed' % llvm_version
return
assert llvm_version is not None
env['llvm'] = True
print 'scons: Found LLVM version %s' % llvm_version
env['LLVM_VERSION'] = llvm_version
# Define HAVE_LLVM macro with the major/minor version number (e.g., 0x0206 for 2.6)
llvm_version_major = int(llvm_version.version[0])
llvm_version_minor = int(llvm_version.version[1])
llvm_version_hex = '0x%02x%02x' % (llvm_version_major, llvm_version_minor)
env.Prepend(CPPDEFINES = [('HAVE_LLVM', llvm_version_hex)])
def exists(env):
return True
# vim:set ts=4 sw=4 et:
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