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+#!/usr/bin/env python
+# encoding: utf-8
+# Carlos Rafael Giani, 2007 (dv)
+# Thomas Nagy, 2016-2018 (ita)
+
+"""
+Try to detect a D compiler from the list of supported compilers::
+
+ def options(opt):
+ opt.load('compiler_d')
+ def configure(cnf):
+ cnf.load('compiler_d')
+ def build(bld):
+ bld.program(source='main.d', target='app')
+
+Only three D compilers are really present at the moment:
+
+* gdc
+* dmd, the ldc compiler having a very similar command-line interface
+* ldc2
+"""
+
+import re
+from waflib import Utils, Logs
+
+d_compiler = {
+'default' : ['gdc', 'dmd', 'ldc2']
+}
+"""
+Dict mapping the platform names to lists of names of D compilers to try, in order of preference::
+
+ from waflib.Tools.compiler_d import d_compiler
+ d_compiler['default'] = ['gdc', 'dmd', 'ldc2']
+"""
+
+def default_compilers():
+ build_platform = Utils.unversioned_sys_platform()
+ possible_compiler_list = d_compiler.get(build_platform, d_compiler['default'])
+ return ' '.join(possible_compiler_list)
+
+def configure(conf):
+ """
+ Detects a suitable D compiler
+
+ :raises: :py:class:`waflib.Errors.ConfigurationError` when no suitable compiler is found
+ """
+ try:
+ test_for_compiler = conf.options.check_d_compiler or default_compilers()
+ except AttributeError:
+ conf.fatal("Add options(opt): opt.load('compiler_d')")
+
+ for compiler in re.split('[ ,]+', test_for_compiler):
+ conf.env.stash()
+ conf.start_msg('Checking for %r (D compiler)' % compiler)
+ try:
+ conf.load(compiler)
+ except conf.errors.ConfigurationError as e:
+ conf.env.revert()
+ conf.end_msg(False)
+ Logs.debug('compiler_d: %r', e)
+ else:
+ if conf.env.D:
+ conf.end_msg(conf.env.get_flat('D'))
+ conf.env.COMPILER_D = compiler
+ conf.env.commit()
+ break
+ conf.env.revert()
+ conf.end_msg(False)
+ else:
+ conf.fatal('could not configure a D compiler!')
+
+def options(opt):
+ """
+ This is how to provide compiler preferences on the command-line::
+
+ $ waf configure --check-d-compiler=dmd
+ """
+ test_for_compiler = default_compilers()
+ d_compiler_opts = opt.add_option_group('Configuration options')
+ d_compiler_opts.add_option('--check-d-compiler', default=None,
+ help='list of D compilers to try [%s]' % test_for_compiler, dest='check_d_compiler')
+
+ for x in test_for_compiler.split():
+ opt.load('%s' % x)
+