Dropping in software construction toolkit.

site_scons/site_tools/target_platform_linux.py

+#!/usr/bin/python2.4
+# Copyright 2008, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Build tool setup for Linux.
+
+This module is a SCons tool which should be include in the topmost windows
+environment.
+It is used as follows:
+  env = base_env.Clone(tools = ['component_setup'])
+  linux_env = base_env.Clone(tools = ['target_platform_linux'])
+"""
+
+
+def ComponentPlatformSetup(env, builder_name):
+  """Hook to allow platform to modify environment inside a component builder.
+
+  Args:
+    env: Environment to modify
+    builder_name: Name of the builder
+  """
+  if env.get('ENABLE_EXCEPTIONS'):
+    env.FilterOut(CCFLAGS=['-fno-exceptions'])
+    env.Append(CCFLAGS=['-fexceptions'])
+
+#------------------------------------------------------------------------------
+
+
+def generate(env):
+  # NOTE: SCons requires the use of this name, which fails gpylint.
+  """SCons entry point for this tool."""
+
+  # Use g++
+  env.Tool('g++')
+  env.Tool('gcc')
+  env.Tool('gnulink')
+  env.Tool('ar')
+  env.Tool('as')
+
+  # Declare bits
+  DeclareBit('linux', 'Target platform is linux.',
+             exclusive_groups=('target_platform'))
+  DeclareBit('posix', 'Target platform is posix.')
+  env.SetBits('linux', 'posix')
+
+  env.Replace(
+      TARGET_PLATFORM='LINUX',
+      COMPONENT_PLATFORM_SETUP=ComponentPlatformSetup,
+  )
+
+  env.Append(
+      HOST_PLATFORMS=['LINUX'],
+      CPPDEFINES=['OS_LINUX=OS_LINUX'],
+
+      # Settings for debug
+      CCFLAGS_DEBUG=[
+          '-O0',     # turn off optimizations
+          '-g',      # turn on debugging info
+      ],
+
+      # Settings for optimized
+      CCFLAGS_OPTIMIZED=['-O2'],
+
+      # Settings for component_builders
+      COMPONENT_LIBRARY_LINK_SUFFIXES=['.so', '.a'],
+      COMPONENT_LIBRARY_DEBUG_SUFFIXES=[],
+  )