Import of the watch repository from Pebble

third_party/waf/waf-light/waflib/Tools/compiler_d.py

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+#!/usr/bin/env python
+# encoding: utf-8
+# Carlos Rafael Giani, 2007 (dv)
+# Thomas Nagy, 2010 (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 os, sys, imp, types
+from waflib import Utils, Configure, Options, Logs
+
+def configure(conf):
+	"""
+	Try to find a suitable D compiler or raise a :py:class:`waflib.Errors.ConfigurationError`.
+	"""
+	for compiler in conf.options.dcheck.split(','):
+		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
+				break
+			conf.end_msg(False)
+	else:
+		conf.fatal('no suitable d compiler was found')
+
+def options(opt):
+	"""
+	Restrict the compiler detection from the command-line::
+
+		$ waf configure --check-d-compiler=dmd
+	"""
+	d_compiler_opts = opt.add_option_group('D Compiler Options')
+	d_compiler_opts.add_option('--check-d-compiler', default='gdc,dmd,ldc2', action='store',
+		help='check for the compiler [Default:gdc,dmd,ldc2]', dest='dcheck')
+	for d_compiler in ['gdc', 'dmd', 'ldc2']:
+		opt.load('%s' % d_compiler)
+