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:
if env['platform'] == 'windows':
# XXX: There is no llvm-config on Windows, so assume a standard layout
- if llvm_dir is not None:
- env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
- env.AppendUnique(CPPDEFINES = [
- '__STDC_LIMIT_MACROS',
- '__STDC_CONSTANT_MACROS',
- 'HAVE_STDINT_H',
+ 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/llvm-config.h')
+ if not os.path.exists(llvm_config):
+ print 'scons: could not find %s' % llvm_config
+ return
+ llvm_version_major_re = re.compile(r'^#define LLVM_VERSION_MAJOR ([0-9]+)')
+ llvm_version_minor_re = re.compile(r'^#define LLVM_VERSION_MINOR ([0-9]+)')
+ llvm_version = None
+ llvm_version_major = None
+ llvm_version_minor = None
+ for line in open(llvm_config, 'rt'):
+ mo = llvm_version_major_re.match(line)
+ if mo:
+ llvm_version_major = mo.group(1)
+ mo = llvm_version_minor_re.match(line)
+ if mo:
+ llvm_version_minor = mo.group(1)
+ if llvm_version_major is not None and llvm_version_minor is not None:
+ llvm_version = distutils.version.LooseVersion('%s.%s' % (llvm_version_major, llvm_version_minor))
+
+ 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')])
+ # LIBS should match the output of `llvm-config --libs engine mcjit bitwriter x86asmprinter`
+ if llvm_version >= distutils.version.LooseVersion('3.6'):
+ env.Prepend(LIBS = [
+ 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
+ 'LLVMX86CodeGen', 'LLVMSelectionDAG', 'LLVMAsmPrinter',
+ 'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMProfileData',
+ 'LLVMInstCombine', 'LLVMTransformUtils', 'LLVMipa',
+ 'LLVMAnalysis', 'LLVMX86Desc', 'LLVMMCDisassembler',
+ 'LLVMX86Info', 'LLVMX86AsmPrinter', 'LLVMX86Utils',
+ 'LLVMMCJIT', 'LLVMTarget', 'LLVMExecutionEngine',
+ 'LLVMRuntimeDyld', 'LLVMObject', 'LLVMMCParser',
+ 'LLVMBitReader', 'LLVMMC', 'LLVMCore', 'LLVMSupport'
])
- env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
+ elif llvm_version >= distutils.version.LooseVersion('3.5'):
env.Prepend(LIBS = [
- 'LLVMX86AsmParser',
- 'LLVMX86AsmPrinter',
- 'LLVMX86CodeGen',
- 'LLVMX86Info',
- 'LLVMLinker',
- 'LLVMipo',
- 'LLVMInterpreter',
- 'LLVMInstrumentation',
- 'LLVMJIT',
- 'LLVMExecutionEngine',
- 'LLVMDebugger',
- 'LLVMBitWriter',
- 'LLVMAsmParser',
- 'LLVMArchive',
- 'LLVMBitReader',
- 'LLVMSelectionDAG',
- 'LLVMAsmPrinter',
- 'LLVMCodeGen',
- 'LLVMScalarOpts',
- 'LLVMTransformUtils',
- 'LLVMipa',
- 'LLVMAnalysis',
- 'LLVMTarget',
- 'LLVMMC',
- 'LLVMCore',
- 'LLVMSupport',
- 'LLVMSystem',
- 'imagehlp',
- 'psapi',
+ 'LLVMBitWriter', 'LLVMMCJIT', 'LLVMRuntimeDyld',
+ 'LLVMX86Disassembler', 'LLVMX86AsmParser', 'LLVMX86CodeGen',
+ 'LLVMSelectionDAG', 'LLVMAsmPrinter', 'LLVMX86Desc',
+ 'LLVMObject', 'LLVMMCParser', 'LLVMBitReader', 'LLVMX86Info',
+ 'LLVMX86AsmPrinter', 'LLVMX86Utils', 'LLVMJIT',
+ 'LLVMExecutionEngine', 'LLVMCodeGen', 'LLVMScalarOpts',
+ 'LLVMInstCombine', 'LLVMTransformUtils', 'LLVMipa',
+ 'LLVMAnalysis', 'LLVMTarget', 'LLVMMC', 'LLVMCore',
+ 'LLVMSupport'
+ ])
+ else:
+ 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')])
+ # Match some of the warning options from llvm/cmake/modules/HandleLLVMOptions.cmake
+ env.AppendUnique(CXXFLAGS = [
+ '/wd4355', # 'this' : used in base member initializer list
+ '/wd4624', # 'derived class' : destructor could not be generated because a base class destructor is inaccessible
])
- env['LLVM_VERSION'] = '2.6'
- return
- elif env.Detect('llvm-config'):
- version = env.backtick('llvm-config --version').rstrip()
+ 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:
- env.ParseConfig('llvm-config --cppflags')
- env.ParseConfig('llvm-config --libs jit interpreter nativecodegen bitwriter')
+ # 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 'llvm-config version %s failed' % version
- else:
- if env['platform'] == 'windows':
- env.Append(LIBS = ['imagehlp', 'psapi'])
- env['LINK'] = env['CXX']
- env['LLVM_VERSION'] = version
+ 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