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1#!/usr/bin/env python2
2
3import argparse
4import errno
5import os
6import shutil
7import tempfile
8from utils import shellcmd
9from utils import FindBaseNaCl
10
11if __name__ == '__main__':
12    argparser = argparse.ArgumentParser()
13    argparser.add_argument('cfile', nargs='+', type=str,
14        help='C file(s) to convert')
15    argparser.add_argument('--dir', nargs='?', type=str, default='.',
16                           help='Output directory. Default "%(default)s".')
17    argparser.add_argument('--disable-verify', action='store_true')
18    args = argparser.parse_args()
19
20    nacl_root = FindBaseNaCl()
21    # Prepend bin to $PATH.
22    os.environ['PATH'] = (
23        nacl_root + '/toolchain/linux_x86/pnacl_newlib_raw/bin' + os.pathsep +
24        os.pathsep + os.environ['PATH'])
25
26    try:
27        tempdir = tempfile.mkdtemp()
28
29        for cname in args.cfile:
30            basename = os.path.splitext(cname)[0]
31            llname = os.path.join(tempdir, basename + '.ll')
32            pnaclname = basename + '.pnacl.ll'
33            pnaclname = os.path.join(args.dir, pnaclname)
34
35            shellcmd('pnacl-clang -O2 -c {0} -o {1}'.format(cname, llname))
36            shellcmd('pnacl-opt ' +
37                     '-pnacl-abi-simplify-preopt -pnacl-abi-simplify-postopt' +
38                     ('' if args.disable_verify else
39                      ' -verify-pnaclabi-module -verify-pnaclabi-functions') +
40                     ' -pnaclabi-allow-debug-metadata'
41                     ' {0} -S -o {1}'.format(llname, pnaclname))
42    finally:
43        try:
44            shutil.rmtree(tempdir)
45        except OSError as exc:
46            if exc.errno != errno.ENOENT: # ENOENT - no such file or directory
47                raise # re-raise exception
48