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#!/usr/bin/env python
# encoding: utf-8
# Matthias Jahn jahn dôt matthias ât freenet dôt de, 2007 (pmarat)
"""
Try to detect a C compiler from the list of supported compilers (gcc, msvc, etc)::
def options(opt):
opt.load('compiler_c')
def configure(cnf):
cnf.load('compiler_c')
def build(bld):
bld.program(source='main.c', target='app')
The compilers are associated to platforms in :py:attr:`waflib.Tools.compiler_c.c_compiler`. To register
a new C compiler named *cfoo* (assuming the tool ``waflib/extras/cfoo.py`` exists), use::
from waflib.Tools.compiler_c import c_compiler
c_compiler['win32'] = ['cfoo', 'msvc', 'gcc']
def options(opt):
opt.load('compiler_c')
def configure(cnf):
cnf.load('compiler_c')
def build(bld):
bld.program(source='main.c', target='app')
Not all compilers need to have a specific tool. For example, the clang compilers can be detected by the gcc tools when using::
$ CC=clang waf configure
"""
import re
from waflib.Tools import ccroot
from waflib import Utils
from waflib.Logs import debug
c_compiler = {
'win32': ['msvc', 'gcc', 'clang'],
'cygwin': ['gcc'],
'darwin': ['clang', 'gcc'],
'aix': ['xlc', 'gcc', 'clang'],
'linux': ['gcc', 'clang', 'icc'],
'sunos': ['suncc', 'gcc'],
'irix': ['gcc', 'irixcc'],
'hpux': ['gcc'],
'osf1V': ['gcc'],
'gnu': ['gcc', 'clang'],
'java': ['gcc', 'msvc', 'clang', 'icc'],
'default':['clang', 'gcc'],
}
"""
Dict mapping platform names to Waf tools finding specific C compilers::
from waflib.Tools.compiler_c import c_compiler
c_compiler['linux'] = ['gcc', 'icc', 'suncc']
"""
def default_compilers():
build_platform = Utils.unversioned_sys_platform()
possible_compiler_list = c_compiler.get(build_platform, c_compiler['default'])
return ' '.join(possible_compiler_list)
def configure(conf):
"""
Detects a suitable C compiler
:raises: :py:class:`waflib.Errors.ConfigurationError` when no suitable compiler is found
"""
try:
test_for_compiler = conf.options.check_c_compiler or default_compilers()
except AttributeError:
conf.fatal("Add options(opt): opt.load('compiler_c')")
for compiler in re.split('[ ,]+', test_for_compiler):
conf.env.stash()
conf.start_msg('Checking for %r (C compiler)' % compiler)
try:
conf.load(compiler)
except conf.errors.ConfigurationError as e:
conf.env.revert()
conf.end_msg(False)
debug('compiler_c: %r', e)
else:
if conf.env.CC:
conf.end_msg(conf.env.get_flat('CC'))
conf.env.COMPILER_CC = compiler
conf.env.commit()
break
conf.env.revert()
conf.end_msg(False)
else:
conf.fatal('could not configure a C compiler!')
def options(opt):
"""
This is how to provide compiler preferences on the command-line::
$ waf configure --check-c-compiler=gcc
"""
test_for_compiler = default_compilers()
opt.load_special_tools('c_*.py', ban=['c_dumbpreproc.py'])
cc_compiler_opts = opt.add_option_group('Configuration options')
cc_compiler_opts.add_option('--check-c-compiler', default=None,
help='list of C compilers to try [%s]' % test_for_compiler,
dest="check_c_compiler")
for x in test_for_compiler.split():
opt.load('%s' % x)
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