mirror of
https://gitlab.com/ita1024/waf.git
synced 2024-11-29 05:21:23 +01:00
63 lines
1.5 KiB
Python
63 lines
1.5 KiB
Python
#!/usr/bin/env python
|
|
# encoding: utf-8
|
|
# John O'Meara, 2006
|
|
# Thomas Nagy, 2006-2017 (ita)
|
|
|
|
"""
|
|
The **flex** program is a code generator which creates C or C++ files.
|
|
The generated files are compiled into object files.
|
|
"""
|
|
|
|
import os, re
|
|
from waflib import Task, TaskGen
|
|
from waflib.Tools import ccroot
|
|
|
|
def decide_ext(self, node):
|
|
if 'cxx' in self.features:
|
|
return ['.lex.cc']
|
|
return ['.lex.c']
|
|
|
|
def flexfun(tsk):
|
|
env = tsk.env
|
|
bld = tsk.generator.bld
|
|
wd = bld.variant_dir
|
|
def to_list(xx):
|
|
if isinstance(xx, str):
|
|
return [xx]
|
|
return xx
|
|
tsk.last_cmd = lst = []
|
|
lst.extend(to_list(env.FLEX))
|
|
lst.extend(to_list(env.FLEXFLAGS))
|
|
inputs = [a.path_from(tsk.get_cwd()) for a in tsk.inputs]
|
|
if env.FLEX_MSYS:
|
|
inputs = [x.replace(os.sep, '/') for x in inputs]
|
|
lst.extend(inputs)
|
|
lst = [x for x in lst if x]
|
|
txt = bld.cmd_and_log(lst, cwd=wd, env=env.env or None, quiet=0)
|
|
tsk.outputs[0].write(txt.replace('\r\n', '\n').replace('\r', '\n')) # issue #1207
|
|
|
|
TaskGen.declare_chain(
|
|
name = 'flex',
|
|
rule = flexfun, # issue #854
|
|
ext_in = '.l',
|
|
decider = decide_ext,
|
|
)
|
|
|
|
# To support the following:
|
|
# bld(features='c', flexflags='-P/foo')
|
|
Task.classes['flex'].vars = ['FLEXFLAGS', 'FLEX']
|
|
ccroot.USELIB_VARS['c'].add('FLEXFLAGS')
|
|
ccroot.USELIB_VARS['cxx'].add('FLEXFLAGS')
|
|
|
|
def configure(conf):
|
|
"""
|
|
Detect the *flex* program
|
|
"""
|
|
conf.find_program('flex', var='FLEX')
|
|
conf.env.FLEXFLAGS = ['-t']
|
|
|
|
if re.search (r"\\msys\\[0-9.]+\\bin\\flex.exe$", conf.env.FLEX[0]):
|
|
# this is the flex shipped with MSYS
|
|
conf.env.FLEX_MSYS = True
|
|
|