| # -*- 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('env') |
| import os |
| |
| # This directory contains untrusted C and ASM source for low-level |
| # CPU-specific libraries implicitly supplied by the compiler driver. |
| # Unlike most untrusted SDK code, conditional compilation may be |
| # freely used, as the target will never be PNaCl. |
| |
| # PNaCl does not support the fini/init mechanism. |
| # Instead the more modern .init_array and .fini_array approach should be used |
| |
| if env.Bit('bitcode'): |
| Return() |
| |
| def GetPlatformSuffix(env): |
| platform = env.get('TARGET_FULLARCH') |
| assert platform in ['x86-32', 'x86-64', 'arm', 'mips32'] |
| # we do not like hyphens in file names |
| return platform.replace('-', '_') |
| |
| platform = GetPlatformSuffix(env) |
| |
| # This is a dummy linker script (a source file), not an actual object file. |
| crt1 = env.InstallAs('crt1.o', 'crt1.x') |
| env.AddObjectToSdk([crt1]) |
| |
| # TODO(mcgrathr): The multilib in the gcc driver logic defeats -Bx/ under -m32. |
| # Figure out a way to make -B really override everything else. |
| if platform == 'x86_32': |
| env.Install(os.path.join('${LIB_DIR}', '32'), crt1) |
| |
| bookends = [env.ComponentObject('crti', ['crti_%s.S' % platform]), |
| env.ComponentObject('crtn', ['crtn_%s.S' % platform])] |
| |
| env.AddObjectToSdk(bookends) |
