llvm.py revision ddb081e3edaadfefe8fdbefe6f572e1632e55942 
1"""llvm
2
3Tool-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
30import os
31import os.path
32import re
33import sys
34import distutils.version
35
36import SCons.Errors
37import SCons.Util
38
39
40def 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            return
67
68        # Try to determine the LLVM version from llvm/Config/config.h
69        llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/config.h')
70        if not os.path.exists(llvm_config):
71            print 'scons: could not find %s' % llvm_config
72            return
73        llvm_version_re = re.compile(r'^#define PACKAGE_VERSION "([^"]*)"')
74        llvm_version = None
75        for line in open(llvm_config, 'rt'):
76            mo = llvm_version_re.match(line)
77            if mo:
78                llvm_version = mo.group(1)
79                llvm_version = distutils.version.LooseVersion(llvm_version)
80                break
81        if llvm_version is None:
82            print 'scons: could not determine the LLVM version from %s' % llvm_config
83            return
84
85        env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
86        env.AppendUnique(CPPDEFINES = [
87            '__STDC_LIMIT_MACROS',
88            '__STDC_CONSTANT_MACROS',
89            'HAVE_STDINT_H',
90        ])
91        env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
92        if llvm_version >= distutils.version.LooseVersion('2.7'):
93            # 2.7
94            env.Prepend(LIBS = [
95                'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
96                'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
97                'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
98                'LLVMMCParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
99                'LLVMSelectionDAG', 'LLVMX86Info', 'LLVMAsmPrinter',
100                'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMInstCombine',
101                'LLVMTransformUtils', 'LLVMipa', 'LLVMAsmParser',
102                'LLVMArchive', 'LLVMBitReader', 'LLVMAnalysis', 'LLVMTarget',
103                'LLVMMC', 'LLVMCore', 'LLVMSupport', 'LLVMSystem',
104            ])
105        else:
106            # 2.6
107            env.Prepend(LIBS = [
108                'LLVMX86AsmParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
109                'LLVMX86Info', 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
110                'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
111                'LLVMDebugger', 'LLVMBitWriter', 'LLVMAsmParser',
112                'LLVMArchive', 'LLVMBitReader', 'LLVMSelectionDAG',
113                'LLVMAsmPrinter', 'LLVMCodeGen', 'LLVMScalarOpts',
114                'LLVMTransformUtils', 'LLVMipa', 'LLVMAnalysis',
115                'LLVMTarget', 'LLVMMC', 'LLVMCore', 'LLVMSupport',
116                'LLVMSystem',
117            ])
118        env.Append(LIBS = [
119            'imagehlp',
120            'psapi',
121        ])
122        if env['msvc']:
123            # Some of the LLVM C headers use the inline keyword without
124            # defining it.
125            env.Append(CPPDEFINES = [('inline', '__inline')])
126            if env['debug']:
127                # LLVM libraries are static, build with /MT, and they
128                # automatically link agains LIBCMT. When we're doing a
129                # debug build we'll be linking against LIBCMTD, so disable
130                # that.
131                env.Append(LINKFLAGS = ['/nodefaultlib:LIBCMT'])
132    elif env.Detect('llvm-config'):
133        llvm_version = env.backtick('llvm-config --version').rstrip()
134        llvm_version = distutils.version.LooseVersion(llvm_version)
135
136        try:
137            env.ParseConfig('llvm-config --cppflags')
138            env.ParseConfig('llvm-config --libs jit interpreter nativecodegen bitwriter')
139            env.ParseConfig('llvm-config --ldflags')
140        except OSError:
141            print 'llvm-config version %s failed' % llvm_version
142        else:
143            env['LINK'] = env['CXX']
144    else:
145        return
146
147    assert llvm_version is not None
148
149    print 'scons: Found LLVM version %s' % llvm_version
150    env['LLVM_VERSION'] = llvm_version
151
152    # Define HAVE_LLVM macro with the major/minor version number (e.g., 0x0206 for 2.6)
153    llvm_version_major = int(llvm_version.version[0])
154    llvm_version_minor = int(llvm_version.version[1])
155    llvm_version_hex = '0x%02x%02x' % (llvm_version_major, llvm_version_minor)
156    env.Prepend(CPPDEFINES = [('HAVE_LLVM', llvm_version_hex)])
157
158def exists(env):
159    return True
160
161# vim:set ts=4 sw=4 et:
162