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#!/usr/bin/env python
# encoding: utf-8
# Carlos Rafael Giani, 2007 (dv)
# Thomas Nagy, 2008-2018 (ita)

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

@conf
def find_dmd(conf):
	"""
	Finds 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):
	"""
	Sets 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

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

	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()