strip_debug.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
 
 
from SCons.Action import Action
 
# Perform debug info splitting according to the GDB manual's guidelines
# https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html
#
# Cannot use scons' chdir feature because it doesn't work in parallel builds
# (working directory is a global variable that is shared by all threads)
#
split_debug_action = Action(
    'cd ${TARGET.dir} && '
    'objcopy ${STRIP_EXTRA_ARGUMENTS} --only-keep-debug ${TARGET.file} ${TARGET.file}.debug && '
    'objcopy --add-gnu-debuglink ${TARGET.file}.debug ${TARGET.file} && '
    'mv ${TARGET.file}.debug .debug/${TARGET.file}.debug && '
    'objcopy --strip-debug --strip-unneeded ${STRIP_EXTRA_ARGUMENTS} ${TARGET.file}',
    "${STRIPCOMSTR}", chdir=False)
 
strip_debug_action = Action(
    'objcopy --strip-debug --strip-unneeded ${STRIP_EXTRA_ARGUMENTS} ${TARGET}',
    "${STRIPCOMSTR}", chdir=False)
 
 
def strip_debug_method(env, target):
    result = []
    for t in target:
        if env['SPLIT_DEBUGINFO']:
            result.append(t.dir.Dir(".debug").File(t.name+".debug"))
            env.SideEffect(result[-1], t)
            env.AddPostAction(t, split_debug_action)
            env.Clean(t, result[-1])
        else:
            env.AddPostAction(t, strip_debug_action)
    return result
 
 
def generate(env):
    env.AddMethod(strip_debug_method, 'StripDebug')
    env['SPLIT_DEBUGINFO'] = True
    env['STRIP_EXTRA_ARGUMENTS'] = "-R '.gnu.debuglto_*'"
 
 
def exists(env):
    return True