Remove Fuchsia build from the gyp build

tools/fuchsia_link.py

-#!/usr/bin/env python
-
-# Copyright (c) 2016 The Dart Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""
-This script performs the final link step for Fuchsia NDK executables.
-Usage:
-./fuchsia_link {arm,arm64,ia32} {executable,library,shared_library}
-               {host,target} [linker args]
-"""
-
-import os
-import subprocess
-import sys
-
-# Figure out where we are.
-SCRIPT_DIR = os.path.dirname(sys.argv[0])
-DART_ROOT = os.path.realpath(os.path.join(SCRIPT_DIR, '..'))
-THIRD_PARTY_ROOT = os.path.join(DART_ROOT, 'third_party')
-
-
-def CheckDirExists(path, docstring):
-  if not os.path.isdir(path):
-    raise Exception('Could not find %s directory %s'
-          % (docstring, path))
-
-
-def execute(args):
-  process = subprocess.Popen(args)
-  process.wait()
-  return process.returncode
-
-
-def main():
-  if len(sys.argv) < 5:
-    raise Exception(sys.argv[0] + " failed: not enough arguments")
-
-  # gyp puts -shared first in a shared_library link. Remove it.
-  if sys.argv[1] == '-shared':
-    sys.argv.remove('-shared')
-
-  # Grab the command line arguments.
-  target_arch = sys.argv[1]
-  link_type = sys.argv[2]
-  link_target = sys.argv[3]
-  link_args = sys.argv[4:]
-
-  # Check arguments.
-  if target_arch not in ['arm64', 'x64',]:
-    raise Exception(sys.argv[0] +
-        " first argument must be 'arm64', or 'x64'")
-  if link_type not in ['executable', 'library', 'shared_library']:
-    raise Exception(sys.argv[0] +
-      " second argument must be 'executable' or 'library' or 'shared_library'")
-  if link_target not in ['host', 'target']:
-    raise Exception(sys.argv[0] + " third argument must be 'host' or 'target'")
-
-  # TODO(zra): Figure out how to link a shared library with the
-  # cross-compilers. For now, we disable it by generating empty files
-  # for the results. We disable it here to avoid inspecting the OS type in
-  # the gyp files.
-  if link_type == 'shared_library':
-    print "NOT linking shared library for Fuchsia."
-    o_index = link_args.index('-o')
-    output = os.path.join(DART_ROOT, link_args[o_index + 1])
-    open(output, 'a').close()
-    sys.exit(0)
-
-  # Set up path to the Fuchsia NDK.
-  CheckDirExists(THIRD_PARTY_ROOT, 'third party tools')
-  fuchsia_tools = os.path.join(THIRD_PARTY_ROOT, 'fuchsia_tools')
-  CheckDirExists(fuchsia_tools, 'Fuchsia tools')
-
-  # Set up the directory of the Fuchsia NDK cross-compiler toolchain.
-  toolchain_arch = 'x86_64-elf-5.3.0-Linux-x86_64'
-  if target_arch == 'arm64':
-    toolchain_arch = 'aarch64-elf-5.3.0-Linux-x86_64'
-  fuchsia_toolchain = os.path.join(
-      fuchsia_tools, 'toolchains', toolchain_arch, 'bin')
-  CheckDirExists(fuchsia_toolchain, 'Fuchsia toolchain')
-
-  # Set up the path to the linker executable.
-  fuchsia_linker = os.path.join(fuchsia_toolchain, 'x86_64-elf-g++')
-  if target_arch == 'arm64':
-    fuchsia_linker = os.path.join(fuchsia_toolchain, 'aarch64-elf-c++')
-
-  # Grab the path to libgcc.a, which we must explicitly add to the link,
-  # by invoking the cross-compiler with the -print-libgcc-file-name flag.
-  fuchsia_gcc = os.path.join(fuchsia_toolchain, 'x86_64-elf-gcc')
-  if target_arch == 'arm64':
-    fuchsia_gcc = os.path.join(fuchsia_toolchain, 'aarch64-elf-gcc')
-  fuchsia_libgcc = subprocess.check_output(
-      [fuchsia_gcc, '-print-libgcc-file-name']).strip()
-
-  # Set up the path to the system root directory, which is where we'll find the
-  # Fuchsia specific system includes and libraries.
-  fuchsia_sysroot = os.path.join(fuchsia_tools, 'sysroot', 'x86_64')
-  if target_arch == 'arm64':
-    fuchsia_sysroot = os.path.join(fuchsia_tools, 'sysroot', 'arm64')
-  CheckDirExists(fuchsia_sysroot, 'Fuchsia sysroot')
-  fuchsia_lib = os.path.join(fuchsia_sysroot, 'usr', 'lib')
-  crtn_fuchsia = os.path.join(fuchsia_lib, 'crtn.o')
-
-  if link_target == 'target':
-    # Add and remove libraries as listed in configurations_fuchsia.gypi
-    libs_to_rm = ['-lrt', '-lpthread']
-    libs_to_add = [fuchsia_libgcc, '-lc', '-ldl', '-lm']
-
-    # Add crtn_fuchsia to end if we are linking an executable.
-    if link_type == 'executable':
-      libs_to_add.extend([crtn_fuchsia])
-
-    link_args = [i for i in link_args if i not in libs_to_rm]
-    link_args.extend(libs_to_add)
-
-    link_args.insert(0, fuchsia_linker)
-  else:
-    link_args.extend(['-ldl', '-lrt'])
-    link_args.insert(0, 'g++')
-
-  print ' '.join(link_args)
-  sys.exit(execute(link_args))
-
-if __name__ == '__main__':
-  main()