3 Tool-specific initialization for LLVM
8 # Copyright (c) 2009 VMware, Inc.
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:
18 # The above copyright notice and this permission notice shall be included
19 # in all copies or substantial portions of the Software.
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34 import distutils.version
40 required_llvm_version = '3.3'
47 llvm_dir = os.environ['LLVM']
49 # Do nothing -- use the system headers/libs
52 if not os.path.isdir(llvm_dir):
53 raise SCons.Errors.InternalError, "Specified LLVM directory not found"
58 llvm_subdir = 'Release'
60 llvm_bin_dir = os.path.join(llvm_dir, llvm_subdir, 'bin')
61 if not os.path.isdir(llvm_bin_dir):
62 llvm_bin_dir = os.path.join(llvm_dir, 'bin')
63 if not os.path.isdir(llvm_bin_dir):
64 raise SCons.Errors.InternalError, "LLVM binary directory not found"
66 env.PrependENVPath('PATH', llvm_bin_dir)
68 if env['platform'] == 'windows':
69 # XXX: There is no llvm-config on Windows, so assume a standard layout
71 print 'scons: LLVM environment variable must be specified when building for windows'
74 # Try to determine the LLVM version from llvm/Config/config.h
75 llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/llvm-config.h')
76 if not os.path.exists(llvm_config):
77 print 'scons: could not find %s' % llvm_config
79 llvm_version_major_re = re.compile(r'^#define LLVM_VERSION_MAJOR ([0-9]+)')
80 llvm_version_minor_re = re.compile(r'^#define LLVM_VERSION_MINOR ([0-9]+)')
82 llvm_version_major = None
83 llvm_version_minor = None
84 for line in open(llvm_config, 'rt'):
85 mo = llvm_version_major_re.match(line)
87 llvm_version_major = mo.group(1)
88 mo = llvm_version_minor_re.match(line)
90 llvm_version_minor = mo.group(1)
91 if llvm_version_major is not None and llvm_version_minor is not None:
92 llvm_version = distutils.version.LooseVersion('%s.%s' % (llvm_version_major, llvm_version_minor))
94 if llvm_version is None:
95 print 'scons: could not determine the LLVM version from %s' % llvm_config
97 if llvm_version < distutils.version.LooseVersion(required_llvm_version):
98 print 'scons: LLVM version %s found, but %s is required' % (llvm_version, required_llvm_version)
101 env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
102 env.AppendUnique(CPPDEFINES = [
103 '__STDC_LIMIT_MACROS',
104 '__STDC_CONSTANT_MACROS',
107 env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
108 # LIBS should match the output of `llvm-config --libs engine mcjit bitwriter x86asmprinter`
109 if llvm_version >= distutils.version.LooseVersion('3.9'):
111 'LLVMX86Disassembler', 'LLVMX86AsmParser',
112 'LLVMX86CodeGen', 'LLVMSelectionDAG', 'LLVMAsmPrinter',
113 'LLVMDebugInfoCodeView', 'LLVMCodeGen',
114 'LLVMScalarOpts', 'LLVMInstCombine',
115 'LLVMInstrumentation', 'LLVMTransformUtils',
116 'LLVMBitWriter', 'LLVMX86Desc',
117 'LLVMMCDisassembler', 'LLVMX86Info',
118 'LLVMX86AsmPrinter', 'LLVMX86Utils',
119 'LLVMMCJIT', 'LLVMExecutionEngine', 'LLVMTarget',
120 'LLVMAnalysis', 'LLVMProfileData',
121 'LLVMRuntimeDyld', 'LLVMObject', 'LLVMMCParser',
122 'LLVMBitReader', 'LLVMMC', 'LLVMCore',
124 'LLVMIRReader', 'LLVMASMParser'
126 elif llvm_version >= distutils.version.LooseVersion('3.7'):
128 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
129 'LLVMX86CodeGen', 'LLVMSelectionDAG', 'LLVMAsmPrinter',
130 'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMProfileData',
131 'LLVMInstCombine', 'LLVMInstrumentation', 'LLVMTransformUtils', 'LLVMipa',
132 'LLVMAnalysis', 'LLVMX86Desc', 'LLVMMCDisassembler',
133 'LLVMX86Info', 'LLVMX86AsmPrinter', 'LLVMX86Utils',
134 'LLVMMCJIT', 'LLVMTarget', 'LLVMExecutionEngine',
135 'LLVMRuntimeDyld', 'LLVMObject', 'LLVMMCParser',
136 'LLVMBitReader', 'LLVMMC', 'LLVMCore', 'LLVMSupport'
138 elif llvm_version >= distutils.version.LooseVersion('3.6'):
140 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
141 'LLVMX86CodeGen', 'LLVMSelectionDAG', 'LLVMAsmPrinter',
142 'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMProfileData',
143 'LLVMInstCombine', 'LLVMTransformUtils', 'LLVMipa',
144 'LLVMAnalysis', 'LLVMX86Desc', 'LLVMMCDisassembler',
145 'LLVMX86Info', 'LLVMX86AsmPrinter', 'LLVMX86Utils',
146 'LLVMMCJIT', 'LLVMTarget', 'LLVMExecutionEngine',
147 'LLVMRuntimeDyld', 'LLVMObject', 'LLVMMCParser',
148 'LLVMBitReader', 'LLVMMC', 'LLVMCore', 'LLVMSupport'
150 elif llvm_version >= distutils.version.LooseVersion('3.5'):
152 'LLVMMCDisassembler',
153 'LLVMBitWriter', 'LLVMMCJIT', 'LLVMRuntimeDyld',
154 'LLVMX86Disassembler', 'LLVMX86AsmParser', 'LLVMX86CodeGen',
155 'LLVMSelectionDAG', 'LLVMAsmPrinter', 'LLVMX86Desc',
156 'LLVMObject', 'LLVMMCParser', 'LLVMBitReader', 'LLVMX86Info',
157 'LLVMX86AsmPrinter', 'LLVMX86Utils', 'LLVMJIT',
158 'LLVMExecutionEngine', 'LLVMCodeGen', 'LLVMScalarOpts',
159 'LLVMInstCombine', 'LLVMTransformUtils', 'LLVMipa',
160 'LLVMAnalysis', 'LLVMTarget', 'LLVMMC', 'LLVMCore',
165 'LLVMMCDisassembler',
166 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
167 'LLVMX86CodeGen', 'LLVMX86Desc', 'LLVMSelectionDAG',
168 'LLVMAsmPrinter', 'LLVMMCParser', 'LLVMX86AsmPrinter',
169 'LLVMX86Utils', 'LLVMX86Info', 'LLVMMCJIT', 'LLVMJIT',
170 'LLVMExecutionEngine', 'LLVMCodeGen', 'LLVMScalarOpts',
171 'LLVMInstCombine', 'LLVMTransformUtils', 'LLVMipa',
172 'LLVMAnalysis', 'LLVMTarget', 'LLVMMC', 'LLVMCore',
173 'LLVMSupport', 'LLVMRuntimeDyld', 'LLVMObject'
182 # Some of the LLVM C headers use the inline keyword without
184 env.Append(CPPDEFINES = [('inline', '__inline')])
185 # Match some of the warning options from llvm/cmake/modules/HandleLLVMOptions.cmake
186 env.AppendUnique(CXXFLAGS = [
187 '/wd4355', # 'this' : used in base member initializer list
188 '/wd4624', # 'derived class' : destructor could not be generated because a base class destructor is inaccessible
190 if env['build'] in ('debug', 'checked'):
191 # LLVM libraries are static, build with /MT, and they
192 # automatically link agains LIBCMT. When we're doing a
193 # debug build we'll be linking against LIBCMTD, so disable
195 env.Append(LINKFLAGS = ['/nodefaultlib:LIBCMT'])
197 if not env.Detect('llvm-config'):
198 print 'scons: llvm-config script not found'
201 llvm_version = env.backtick('llvm-config --version').rstrip()
202 llvm_version = distutils.version.LooseVersion(llvm_version)
204 if llvm_version < distutils.version.LooseVersion(required_llvm_version):
205 print 'scons: LLVM version %s found, but %s is required' % (llvm_version, required_llvm_version)
209 # Treat --cppflags specially to prevent NDEBUG from disabling
210 # assertion failures in debug builds.
211 cppflags = env.ParseFlags('!llvm-config --cppflags')
213 cppflags['CPPDEFINES'].remove('NDEBUG')
216 env.MergeFlags(cppflags)
218 # Match llvm --fno-rtti flag
219 cxxflags = env.backtick('llvm-config --cxxflags').split()
220 if '-fno-rtti' in cxxflags:
221 env.Append(CXXFLAGS = ['-fno-rtti'])
223 components = ['engine', 'mcjit', 'bitwriter', 'x86asmprinter', 'mcdisassembler', 'irreader']
225 env.ParseConfig('llvm-config --libs ' + ' '.join(components))
226 env.ParseConfig('llvm-config --ldflags')
227 if llvm_version >= distutils.version.LooseVersion('3.5'):
228 env.ParseConfig('llvm-config --system-libs')
229 env.Append(CXXFLAGS = ['-std=c++11'])
231 print 'scons: llvm-config version %s failed' % llvm_version
234 assert llvm_version is not None
237 print 'scons: Found LLVM version %s' % llvm_version
238 env['LLVM_VERSION'] = llvm_version
240 # Define HAVE_LLVM macro with the major/minor version number (e.g., 0x0206 for 2.6)
241 llvm_version_major = int(llvm_version.version[0])
242 llvm_version_minor = int(llvm_version.version[1])
243 llvm_version_hex = '0x%02x%02x' % (llvm_version_major, llvm_version_minor)
244 env.Prepend(CPPDEFINES = [('HAVE_LLVM', llvm_version_hex)])
249 # vim:set ts=4 sw=4 et: