Disable LLVM's use of strerror_s on Windows

toolchain_build/toolchain_build_pnacl.py

 #!/usr/bin/python
 # Copyright (c) 2013 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.
 
 """Recipes for PNaCl toolchain packages.
 
    Recipes consist of specially-structured dictionaries, with keys for package
    name, type, commands to execute, etc. The structure is documented in the
    PackageBuilder docstring in toolchain_main.py.
@@ skipping 672 matching lines @@
                    '--disable-zlib',
                    '--enable-optimized=' + ('no' if HostIsDebug(options)
                                             else 'yes'),
                    '--enable-debug=' + ('yes' if HostIsDebug(options)
                                         else 'no'),
                    '--enable-targets=x86,arm,mips',
                    '--enable-werror=' + ('yes' if llvm_do_werror else 'no'),
                    '--prefix=/',
                    '--program-prefix=',
                    '--with-binutils-include=%(abs_binutils_pnacl_src)s/include',
-                   '--with-clang-srcdir=%(abs_clang_src)s'
+                   '--with-clang-srcdir=%(abs_clang_src)s',
+                   'ac_cv_have_decl_strerror_s=no',
                   ] + shared)] +
               CopyHostLibcxxForLLVMBuild(
                   host,
                   os.path.join(('Debug+Asserts' if HostIsDebug(options)
                                 else 'Release+Asserts'), 'lib'),
                   options) +
               [command.Command(MakeCommand(host) + [
                   'VERBOSE=1',
                   'PNACL_BROWSER_TRANSLATOR=0',
                   'SUBZERO_SRC_ROOT=%(abs_subzero_src)s',
@@ skipping 439 matching lines @@
           'x86-32-%s' % pynacl.platform.GetOS(), unsandboxed_runtime_canonical))
 
     if args.build_sbtc and not args.pnacl_in_pnacl:
       packages.update(pnacl_sandboxed_translator.SandboxedTranslators(
         SANDBOXED_TRANSLATOR_ARCHES))
 
   tb = toolchain_main.PackageBuilder(packages,
                                      upload_packages,
                                      leftover_args)
   tb.Main()