PNaCl: Update clang and llvm revision in pnacl/COMPONENT_REVISIONS

pnacl/driver/pnacl-driver.py

 #!/usr/bin/python
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import re
 import subprocess
 
 from driver_tools import AddHostBinarySearchPath, DefaultOutputName, \
     DefaultPCHOutputName, DriverChain, GetArch, ParseArgs, ParseTriple, \
@@ skipping 54 matching lines @@
   'FRONTEND_TRIPLE' : 'le32-unknown-nacl',
 
   'OPT_LEVEL'   : '',  # Default for most tools is 0, but we need to know
                        # if it's explicitly set or not when the driver
                        # is only used for linking + translating.
   'CC_FLAGS'    : '-O${#OPT_LEVEL ? ${OPT_LEVEL} : 0} ' +
                   '-fno-vectorize -fno-slp-vectorize ' +
                   '-fno-common ${PTHREAD ? -pthread} ' +
                   '-nostdinc ${BIAS_%BIAS%} ' +
                   '-fno-gnu-inline-asm ' +
-                  '-target ${FRONTEND_TRIPLE}',
+                  '-target ${FRONTEND_TRIPLE} ' +
+                  '${IS_CXX ? -fexceptions}',

[Derek Schuff, 2016/03/08 21:24:15]

This should be overridable using -fno-exceptions.
So maybe another env var like FRONTEND_EXCEPTIONS which defaults to true, but
can be overriden if the user passes -fno-exceptions.

[Petr Hosek, 2016/03/08 21:33:22]

We capture all '-f.*' flags and append them to CC_FLAGS, so passing in
-fno-exceptions overrides the -fexceptions (the last one wins).

[Derek Schuff, 2016/03/08 21:34:51]

Ah yeah, i forgot about that. Do we have a test for -fexceptions? Seems like we
maybe should since pnacl's exception story is unusual. If not we should maybe
add that, but doesn't need to be in this CL.

 
 
   'ISYSTEM'        : '${ISYSTEM_USER} ${STDINC ? ${ISYSTEM_BUILTIN}}',
 
   'ISYSTEM_USER'   : '',  # System include directories specified by
                           # using the -isystem flag.
 
   'ISYSTEM_BUILTIN':
     '${BASE_USR}/usr/include ' +
     '${ISYSTEM_CLANG} ' +
@@ skipping 700 matching lines @@
   -g                    Generate complete debug information.
   -gline-tables-only    Generate debug line-information only
                         (allowing for stack traces).
   -flimit-debug-info    Generate limited debug information.
   -save-temps           Keep intermediate compilation results.
   -v                    Verbose output / show commands.
   -h | --help           Show this help.
   --help-full           Show underlying clang driver's help message
                         (warning: not all options supported).
 """ % (tool)