#!/usr/bin/env python
# encoding: utf-8
# Carlos Rafael Giani, 2007 (dv)
# Thomas Nagy, 2008-2010 (ita)

import sys
from waflib.Tools import ar, d
from waflib.Configure import conf

@conf
def find_dmd(conf):
	"""
	Find the program *dmd*, *dmd2*, or *ldc* and set the variable *D*
	"""
	conf.find_program(['dmd', 'dmd2', 'ldc'], var='D')

	# make sure that we're dealing with dmd1, dmd2, or ldc(1)
	out = conf.cmd_and_log(conf.env.D + ['--help'])
	if out.find("D Compiler v") == -1:
		out = conf.cmd_and_log(conf.env.D + ['-version'])
		if out.find("based on DMD v1.") == -1:
			conf.fatal("detected compiler is not dmd/ldc")

@conf
def common_flags_ldc(conf):
	"""
	Set the D flags required by *ldc*
	"""
	v = conf.env
	v['DFLAGS']        = ['-d-version=Posix']
	v['LINKFLAGS']     = []
	v['DFLAGS_dshlib'] = ['-relocation-model=pic']

@conf
def common_flags_dmd(conf):
	"""
	Set the flags required by *dmd* or *dmd2*
	"""

	v = conf.env

	# _DFLAGS _DIMPORTFLAGS

	# Compiler is dmd so 'gdc' part will be ignored, just
	# ensure key is there, so wscript can append flags to it
	#v['DFLAGS']            = ['-version=Posix']

	v['D_SRC_F']           = ['-c']
	v['D_TGT_F']           = '-of%s'

	# linker
	v['D_LINKER']          = v['D']
	v['DLNK_SRC_F']        = ''
	v['DLNK_TGT_F']        = '-of%s'
	v['DINC_ST']           = '-I%s'

	v['DSHLIB_MARKER'] = v['DSTLIB_MARKER'] = ''
	v['DSTLIB_ST'] = v['DSHLIB_ST']         = '-L-l%s'
	v['DSTLIBPATH_ST'] = v['DLIBPATH_ST']   = '-L-L%s'

	v['LINKFLAGS_dprogram']= ['-quiet']

	v['DFLAGS_dshlib']     = ['-fPIC']
	v['LINKFLAGS_dshlib']  = ['-L-shared']

	v['DHEADER_ext']       = '.di'
	v.DFLAGS_d_with_header = ['-H', '-Hf']
	v['D_HDR_F']           = '%s'

def configure(conf):
	"""
	Configuration for *dmd*, *dmd2*, and *ldc*
	"""
	conf.find_dmd()

	if sys.platform == 'win32':
		out = conf.cmd_and_log(conf.env.D + ['--help'])
		if out.find("D Compiler v2.") > -1:
			conf.fatal('dmd2 on Windows is not supported, use gdc or ldc2 instead')

	conf.load('ar')
	conf.load('d')
	conf.common_flags_dmd()
	conf.d_platform_flags()

	if str(conf.env.D).find('ldc') > -1:
		conf.common_flags_ldc()