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# pylint: disable=g-bad-file-header
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Wrapper script for executing the Microsoft Compiler."""
import os
import sys
import msvc_link
import msvc_tools
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
sys.path.append(SCRIPT_DIR)
GCCPATTERNS = [
('-I(.+)', ['/I$0']),
('-m(32|64)', ['$TARGET_ARCH']),
('-Xcompilation-mode=(dbg|fastbuild|opt)', ['$COMPILATION_MODE']),
('-msse', ['/arch:SSE']),
('-msse2', ['/arch:SSE2']),
('-D(.+)', ['/D$0']),
('-U(.+)', ['/U$0']),
('-E', ['/E']),
('-O0', ['/Od']),
('-Os', ['/O1']),
('-O2', ['/O2']),
('-g0', []),
('-g', ['$DEBUG_RT']),
('-fexceptions', ['/U_HAS_EXCEPTIONS', '/D_HAS_EXCEPTIONS=1', '/EHsc']),
('-fomit-frame-pointer', ['/Oy']),
('-fno-rtti', ['/GR-']),
('-frtti', ['/GR']),
('-fPIC', []),
# This is unneeded for Windows.
(('-include', '(.+)'), ['/FI$PATH0']),
('-w', ['/w']),
('-Wall', ['/Wall']),
('-Wsign-compare', ['/we4018']),
('-Wno-sign-compare', ['/wd4018']),
('-Wconversion', ['/we4244', '/we4267']),
('-Wno-conversion', ['/wd4244', '/wd4267']),
('-Wno-sign-conversion', []),
('-Wno-implicit-fallthrough', []),
('-Wno-implicit-function-declaration', ['/wd4013']),
('-Wimplicit-function-declaration', ['/we4013']),
('-Wcovered-switch-default', ['/we4062']),
('-Wno-covered-switch-default', ['/wd4062']),
('-Wno-error', []),
('-Wno-invalid-offsetof', []),
('-Wno-overloaded-virtual', []),
('-Wno-reorder', []),
('-Wno-string-plus-int', []),
('-Wl,S', []), # Stripping is unnecessary since msvc uses pdb files.
('-Wl,-rpath(.+)', []),
('-B(.+)', []),
('-static', []),
('-shared', ['/DLL']),
('-std=(.+)', []),
]
def _IsLink(args):
"""Determines whether we need to link rather than compile.
A set of arguments is for linking if they contain -static, -shared, are adding
adding library search paths through -L, or libraries via -l.
Args:
args: List of arguments
Returns:
Boolean whether this is a link operation or not.
"""
for arg in args:
# Certain flags indicate we are linking.
if (arg in ['-shared', '-static'] or arg[:2] in ['-l', '-L'] or
arg[:3] == '-Wl'):
return True
return False
class MsvcCompiler(msvc_tools.WindowsRunner):
"""Driver for the Microsoft compiler."""
def Run(self, argv):
"""Runs the compiler using the passed clang/gcc style argument list.
Args:
argv: List of arguments
Returns:
The return code of the compilation.
Raises:
ValueError: if target architecture isn't specified
"""
parser = msvc_tools.ArgParser(self, argv, GCCPATTERNS)
# Select runtime option
# Find the last runtime option passed
rt = None
rt_idx = -1
for i, opt in enumerate(reversed(parser.options)):
if opt in ['/MT', '/MTd', '/MD', '/MDd']:
if opt[-1] == 'd':
parser.enforce_debug_rt = True
rt = opt[:3]
rt_idx = len(parser.options) - i - 1
break
rt = rt or '/MT' # Default to static runtime
# Add debug if necessary
if parser.enforce_debug_rt:
rt += 'd'
# Include runtime option
if rt_idx >= 0:
parser.options[rt_idx] = rt
else:
parser.options.append(rt)
compiler = 'cl'
if parser.is_cuda_compilation:
compiler = 'nvcc'
return self.RunBinary(compiler, parser.options, parser)
def main(argv):
# If we are supposed to link create a static library.
if _IsLink(argv[1:]):
return msvc_link.main(argv)
else:
return MsvcCompiler().Run(argv[1:])
if __name__ == '__main__':
sys.exit(main(sys.argv[1:])) # need to skip the first argument
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