waf/playground/pch/wscript

#! /usr/bin/env python
# encoding: utf-8
# Thomas Nagy, 2006 (ita)

"""
Note: the #warning will come once when the .h is compiled, it should not not come when the .cpp is compiled when precompiled headers are enabled

Compare:
   waf configure clean build
and
   waf configure clean build --without-pch
"""

VERSION='0.0.2'
APPNAME='pch_test'

top = '.'
out = 'build'

from waflib import Errors

# to include <boost/asio.hpp> to slow down compilation of precompiled headers
LOAD_BOOST = False

def options(opt):
	opt.load('compiler_cxx')
	opt.load('pch')
	if LOAD_BOOST:
		opt.load('boost', mt=True)

def configure(conf):
	conf.load('compiler_cxx pch')
	if LOAD_BOOST:
		conf.load('boost')
		conf.check_boost('thread system', mt=True)
		#conf.env.append_value('LIB_BOOST', 'pthread') #?
		conf.env.append_value('DEFINES_BOOST', ['HAS_MY_BOOST=1'])

def build(bld):
	# Simple way, when precompiled header is used in a single build task
	bld.program(
		target = 'test',
		features = 'pch',
		source = 'a.cpp b.cpp c.cpp main.cpp',
		headers = 'a.h b.h c.h',
		use = 'BOOST')

	# More complex way, where precompiled header is reused by several build tasks
	bld(features ='cxx pch',
		name = 'base-with-pch',
		target = 'pch-header',
		headers = 'a.h b.h c.h',
		source = 'a.cpp',
		use = 'BOOST')

	bld(features = 'cxx cxxprogram',
		target = 'test1',
		source = 'b.cpp c.cpp main.cpp',
		use    = 'base-with-pch')