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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 (g++, msvc, etc)::
+
+ def options(opt):
+ opt.load('compiler_cxx')
+ def configure(cnf):
+ cnf.load('compiler_cxx')
+ def build(bld):
+ bld.program(source='main.cpp', target='app')
+
+The compilers are associated to platforms in :py:attr:`waflib.Tools.compiler_cxx.cxx_compiler`. To register
+a new C++ compiler named *cfoo* (assuming the tool ``waflib/extras/cfoo.py`` exists), use::
+
+ from waflib.Tools.compiler_cxx import cxx_compiler
+ cxx_compiler['win32'] = ['cfoo', 'msvc', 'gcc']
+
+ def options(opt):
+ opt.load('compiler_cxx')
+ def configure(cnf):
+ cnf.load('compiler_cxx')
+ 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::
+
+ $ CXX=clang waf configure
+"""
+
+
+import re
+from waflib.Tools import ccroot
+from waflib import Utils
+from waflib.Logs import debug
+
+cxx_compiler = {
+'win32': ['msvc', 'g++', 'clang++'],
+'cygwin': ['g++'],
+'darwin': ['clang++', 'g++'],
+'aix': ['xlc++', 'g++', 'clang++'],
+'linux': ['g++', 'clang++', 'icpc'],
+'sunos': ['sunc++', 'g++'],
+'irix': ['g++'],
+'hpux': ['g++'],
+'osf1V': ['g++'],
+'gnu': ['g++', 'clang++'],
+'java': ['g++', 'msvc', 'clang++', 'icpc'],
+'default': ['clang++', 'g++']
+}
+"""
+Dict mapping the platform names to Waf tools finding specific C++ compilers::
+
+ from waflib.Tools.compiler_cxx import cxx_compiler
+ cxx_compiler['linux'] = ['gxx', 'icpc', 'suncxx']
+"""
+
+def default_compilers():
+ build_platform = Utils.unversioned_sys_platform()
+ possible_compiler_list = cxx_compiler.get(build_platform, cxx_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_cxx_compiler or default_compilers()
+ except AttributeError:
+ conf.fatal("Add options(opt): opt.load('compiler_cxx')")
+
+ 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_cxx: %r', e)
+ else:
+ if conf.env.CXX:
+ conf.end_msg(conf.env.get_flat('CXX'))
+ conf.env.COMPILER_CXX = 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-cxx-compiler=gxx
+ """
+ test_for_compiler = default_compilers()
+ opt.load_special_tools('cxx_*.py')
+ cxx_compiler_opts = opt.add_option_group('Configuration options')
+ cxx_compiler_opts.add_option('--check-cxx-compiler', default=None,
+ help='list of C++ compilers to try [%s]' % test_for_compiler,
+ dest="check_cxx_compiler")
+
+ for x in test_for_compiler.split():
+ opt.load('%s' % x)
+