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author | David Robillard <d@drobilla.net> | 2018-09-15 14:51:02 +0200 |
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committer | David Robillard <d@drobilla.net> | 2018-09-15 14:51:02 +0200 |
commit | eede9648d50c3750f6f8d1319a79dd76d7f10b55 (patch) | |
tree | ff0760d5f3f0e994413c8c1dff7a4fed37914bee /Tools/flex.py | |
download | ingen-eede9648d50c3750f6f8d1319a79dd76d7f10b55.tar.gz ingen-eede9648d50c3750f6f8d1319a79dd76d7f10b55.tar.bz2 ingen-eede9648d50c3750f6f8d1319a79dd76d7f10b55.zip |
Squashed 'waflib/' content from commit 982416b8
git-subtree-dir: waflib
git-subtree-split: 982416b8a6c6728e200243e1be3ab60435c08830
Diffstat (limited to 'Tools/flex.py')
-rw-r--r-- | Tools/flex.py | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/Tools/flex.py b/Tools/flex.py new file mode 100644 index 00000000..2256657b --- /dev/null +++ b/Tools/flex.py @@ -0,0 +1,62 @@ +#!/usr/bin/env python +# encoding: utf-8 +# John O'Meara, 2006 +# Thomas Nagy, 2006-2018 (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 + |