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# functions for handling cross-compilation
import os, sys, re, shlex
import Utils, Logs, Options
from Configure import conf
real_Popen = None
ANSWER_UNKNOWN = (254, "")
ANSWER_NO = (1, "")
ANSWER_OK = (0, "")
cross_answers_incomplete = False
def add_answer(ca_file, msg, answer):
'''add an answer to a set of cross answers'''
try:
f = open(ca_file, 'a')
except:
Logs.error("Unable to open cross-answers file %s" % ca_file)
sys.exit(1)
(retcode, retstring) = answer
# if retstring is more than one line then we probably
# don't care about its actual content (the tests should
# yield one-line output in order to comply with the cross-answer
# format)
retstring = retstring.strip()
if len(retstring.split('\n')) > 1:
retstring = ''
answer = (retcode, retstring)
if answer == ANSWER_OK:
f.write('%s: OK\n' % msg)
elif answer == ANSWER_UNKNOWN:
f.write('%s: UNKNOWN\n' % msg)
elif answer == ANSWER_NO:
f.write('%s: NO\n' % msg)
else:
if retcode == 0:
f.write('%s: "%s"\n' % (msg, retstring))
else:
f.write('%s: (%d, "%s")\n' % (msg, retcode, retstring))
f.close()
def cross_answer(ca_file, msg):
'''return a (retcode,retstring) tuple from a answers file'''
try:
f = open(ca_file, 'r')
except:
return ANSWER_UNKNOWN
for line in f:
line = line.strip()
if line == '' or line[0] == '#':
continue
if line.find(':') != -1:
a = line.split(':', 1)
thismsg = a[0].strip()
if thismsg != msg:
continue
ans = a[1].strip()
if ans == "OK" or ans == "YES":
f.close()
return ANSWER_OK
elif ans == "UNKNOWN":
f.close()
return ANSWER_UNKNOWN
elif ans == "FAIL" or ans == "NO":
f.close()
return ANSWER_NO
elif ans[0] == '"':
f.close()
return (0, ans.strip('"'))
elif ans[0] == "'":
f.close()
return (0, ans.strip("'"))
else:
m = re.match('\(\s*(-?\d+)\s*,\s*\"(.*)\"\s*\)', ans)
if m:
f.close()
return (int(m.group(1)), m.group(2))
else:
raise Utils.WafError("Bad answer format '%s' in %s" % (line, ca_file))
f.close()
return ANSWER_UNKNOWN
class cross_Popen(Utils.pproc.Popen):
'''cross-compilation wrapper for Popen'''
def __init__(*k, **kw):
(obj, args) = k
use_answers = False
ans = ANSWER_UNKNOWN
# Three possibilities:
# 1. Only cross-answers - try the cross-answers file, and if
# there's no corresponding answer, add to the file and mark
# the configure process as unfinished.
# 2. Only cross-execute - get the answer from cross-execute
# 3. Both - try the cross-answers file, and if there is no
# corresponding answer - use cross-execute to get an answer,
# and add that answer to the file.
if '--cross-answers' in args:
# when --cross-answers is set, then change the arguments
# to use the cross answers if available
use_answers = True
i = args.index('--cross-answers')
ca_file = args[i+1]
msg = args[i+2]
ans = cross_answer(ca_file, msg)
if '--cross-execute' in args and ans == ANSWER_UNKNOWN:
# when --cross-execute is set, then change the arguments
# to use the cross emulator
i = args.index('--cross-execute')
newargs = shlex.split(args[i+1])
newargs.extend(args[0:i])
if use_answers:
p = real_Popen(newargs,
stdout=Utils.pproc.PIPE,
stderr=Utils.pproc.PIPE)
ce_out, ce_err = p.communicate()
ans = (p.returncode, ce_out)
add_answer(ca_file, msg, ans)
else:
args = newargs
if use_answers:
if ans == ANSWER_UNKNOWN:
global cross_answers_incomplete
cross_answers_incomplete = True
add_answer(ca_file, msg, ans)
(retcode, retstring) = ans
args = ['/bin/sh', '-c', "echo -n '%s'; exit %d" % (retstring, retcode)]
real_Popen.__init__(*(obj, args), **kw)
@conf
def SAMBA_CROSS_ARGS(conf, msg=None):
'''get exec_args to pass when running cross compiled binaries'''
if not conf.env.CROSS_COMPILE:
return []
global real_Popen
if real_Popen is None:
real_Popen = Utils.pproc.Popen
Utils.pproc.Popen = cross_Popen
ret = []
if conf.env.CROSS_EXECUTE:
ret.extend(['--cross-execute', conf.env.CROSS_EXECUTE])
if conf.env.CROSS_ANSWERS:
if msg is None:
raise Utils.WafError("Cannot have NULL msg in cross-answers")
ret.extend(['--cross-answers', os.path.join(Options.launch_dir, conf.env.CROSS_ANSWERS), msg])
if ret == []:
raise Utils.WafError("Cannot cross-compile without either --cross-execute or --cross-answers")
return ret
@conf
def SAMBA_CROSS_CHECK_COMPLETE(conf):
'''check if we have some unanswered questions'''
global cross_answers_incomplete
if conf.env.CROSS_COMPILE and cross_answers_incomplete:
raise Utils.WafError("Cross answers file %s is incomplete" % conf.env.CROSS_ANSWERS)
return True
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