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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)
+