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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import errno
import os
import shlex
import subprocess
import sys
import tempfile
import buildconfig
from mozfile import which
def preprocess(out, asm_file):
cxx = shlex.split(buildconfig.substs["CXX"])
if not os.path.exists(cxx[0]):
tool = cxx[0]
cxx[0] = which(tool)
if not cxx[0]:
raise OSError(errno.ENOENT, "Could not find {} on PATH.".format(tool))
cppflags = buildconfig.substs["OS_CPPFLAGS"]
# subprocess.Popen(stdout=) only accepts actual file objects, which `out`,
# above, is not. So fake a temporary file to write to.
(outhandle, tmpout) = tempfile.mkstemp(suffix=".cpp")
# #line directives will confuse armasm64, and /EP is the only way to
# preprocess without emitting #line directives.
command = cxx + ["/EP"] + cppflags + ["/TP", asm_file]
with open(tmpout, "wb") as t:
result = subprocess.Popen(command, stdout=t).wait()
if result != 0:
sys.exit(result)
with open(tmpout, "rb") as t:
out.write(t.read())
os.close(outhandle)
os.remove(tmpout)
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