| #!/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', '-ldl'] |
| libs_to_add = [fuchsia_libgcc, '-lc',] |
| |
| # 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() |