Source code for waflib.Tools.compiler_c

#!/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)

[docs]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!')
[docs]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)