# Copyright (c) 2017,2019 by Qualcomm Technologies, Incorporated.
# All Rights Reserved.
# QUALCOMM Proprietary/GTDR

import os
import string
import re
import sys
import SCons.Action
from SCons.Script import *

def exists(env):
   return True

def exactly_one(things):
  return things.count(True) == 1

def get_enabled_sanitizer(env, sanitizers):
    enabled = [env.get(o) for o in sanitizers]
    disallowed_pairs = [
      ['OFFTARGET_ASAN','OFFTARGET_THREADSAN',],
      ['OFFTARGET_ASAN','OFFTARGET_MSAN',],
      ['OFFTARGET_MSAN','OFFTARGET_THREADSAN',],
    ]
    if enabled.count(True) > 3:
      raise ValueError("You cannot combine more than 3 sanitizers!")
    enabled_list = []
    for v in sanitizers:
      if env.get(v):
        enabled_list.append(v)
    for disallowed in disallowed_pairs:
      if all(d in enabled_list for d in disallowed):
        raise ValueError("You cannot combine the sanitizers you specified!")
    return enabled_list

def smart_link(source, target, env, for_signature):
  cpp_suffixes = ['.cpp', '.cc', '.cxx', '.c++', '.C++', '.mm']

  def iscplusplus(source):
    if not source:
      return False
    for s in source:
      if s.sources:
        ext = os.path.splitext(str(s.sources[0]))[1]
        if ext in cpp_suffixes:
          return True
    return False

  linker = '$CXX ' if iscplusplus else '$CC '

  return linker + ' $LINKFLAGS $SOURCES -Wl,--start-group $_LIBDIRFLAGS $_LIBFLAGS -Wl,--end-group -o $TARGET'


def generate(env):
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_ANDROID_BUILD', 'OFFTARGET_ANDROID_BUILD', 0))
  env.AddCommandlineArgument(env.ValueVariable('NDK_PATH', 'NDK_PATH', ''))
  env.AddCommandlineArgument(env.ValueVariable('ANDROID_VERSION', 'ANDROID_VERSION', ''))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_LOCAL_CLANG', 'OFFTARGET_LOCAL_CLANG', 0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_DEBUG',       'OFFTARGET_DEBUG',       0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_RELEASE',     'OFFTARGET_RELEASE',     0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_WEVERYTHING', 'OFFTARGET_WEVERYTHING', 0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_ASAN',        'OFFTARGET_ASAN',        0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_MSAN',        'OFFTARGET_MSAN',        0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_UBSAN',       'OFFTARGET_UBSAN',       0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_THREADSAN',   'OFFTARGET_THREADSAN',   0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_FUZZER',      'OFFTARGET_FUZZER',      0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_LINECOVERAGE','OFFTARGET_LINECOVERAGE',0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_LINECOVERAGE_VERBOSE','OFFTARGET_LINECOVERAGE_VERBOSE',0))
  env.AddCommandlineArgument(env.BoolVariable('OFFTARGET_SANITIZER_NO_RECOVER','OFFTARGET_SANITIZER_NO_RECOVER',0))
  env.AddCommandlineArgument(env.ValueVariable('CLANG_SA_PATH', 'CLANG_SA_PATH', ''))

  env.AddMethod(do_linecoverage,'DoLineCoverage')
  env.AddMethod(get_sanitizer_commandline_options,'GetSanitizerCommandlineOptions')
  #'PROC' must be in the env at this point
  try:
    oldProc = env['PROC']
    CHECKING_TOOLCHAIN_EXISTS=False
  except:
    #we are testing to see if the toolchain actually exists
    oldProc = 'A53_64'
    CHECKING_TOOLCHAIN_EXISTS=True

  if oldProc == 'scorpion':
    env['PROC'] = 'x86-32'
  elif oldProc == 'A53_64':
    env['PROC'] = 'x86-64'

  if env.get('OFFTARGET_ANDROID_BUILD') and env.get('OFFTARGET_LOCAL_CLANG'):
     raise Exception('Error: conflicting options OFFTARGET_ANDROID_BUILD and OFFTARGET_LOCAL_CLANG')

  # When 'scan-build 'build cmd'' is run, $CC is set to the cc analyzer.
  if (os.getenv('CC')) and ('ccc-analyzer' in os.getenv('CC')):
     scan_build = True
  else:
     scan_build = False

  if scan_build and ((not env.get('OFFTARGET_LOCAL_CLANG')) and (not env.get('OFFTARGET_ANDROID_BUILD'))):
     raise Exception('Error: clang-sa builds are only supported when using a local clang toolchain')

  if env['PROC'] == 'x86-32':
    tools_prefix = '/pkg/ssg/toolchain32'
    dynamic_linker = '${OFFTARGET_TOOLS_PREFIX}/lib/i386-linux-gnu/ld-linux.so.2'
    ld_library_path = [
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/i386-linux-gnu/',
      '${OFFTARGET_TOOLS_PREFIX}/lib/i386-linux-gnu/',
      '${OFFTARGET_TOOLS_PREFIX}/lib',
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/',
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/gcc/i686-linux-gnu/7',
    ]
    inc_paths = [
      '${OFFTARGET_TOOLS_PREFIX}/usr/include',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/c++/7.3.0',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/c++/7.3.0/backward',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/i386-linux-gnu',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/i386-linux-gnu/c++/7.3.0',
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/llvm-6.0/lib/clang/6.0.0/include',
      '${OFFTARGET_TOOLS_PREFIX}/usr/local/include',
    ]
  else:
    tools_prefix = '/pkg/ssg/toolchain64'
    dynamic_linker = '${OFFTARGET_TOOLS_PREFIX}/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2'
    ld_library_path = [
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/x86_64-linux-gnu/',
      '${OFFTARGET_TOOLS_PREFIX}/lib/x86_64-linux-gnu/',
      '${OFFTARGET_TOOLS_PREFIX}/lib',
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/',
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/gcc/x86_64-linux-gnu/7',
    ]
    inc_paths = [
      '${OFFTARGET_TOOLS_PREFIX}/usr/include',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/c++/7.3.0',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/c++/7.3.0/backward',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/x86_64-linux-gnu',
      '${OFFTARGET_TOOLS_PREFIX}/usr/include/x86_64-linux-gnu/c++/7.3.0',
      '${OFFTARGET_TOOLS_PREFIX}/usr/lib/llvm-6.0/lib/clang/6.0.0/include',
      '${OFFTARGET_TOOLS_PREFIX}/usr/local/include',
    ]
  ld_library_path_str = 'LD_LIBRARY_PATH="' + ':'.join(ld_library_path) + '"  '
  env['OFFTARGET_TOOLS_PREFIX'] = tools_prefix
  env['OFFTARGET_DYNAMIC_LD'] = dynamic_linker

  tools_bin_dir = [os.path.join(tools_prefix,'bin'), os.path.join(tools_prefix,'usr','bin')]

  #os.environ['PATH'] is a string, where paths are separated by ':' (linux) and ';' (windows)
  if sys.platform.startswith('win'):
    separator=';'
  elif sys.platform.startswith('linux'):
    separator=':'

  search_paths = os.environ['PATH'].split(separator)

  elf_h_location = '/usr/include/elf.h'

  if env.get('OFFTARGET_ANDROID_BUILD'):
     if not env.get('NDK_PATH'):
        raise Exception("Error: Android NDK path must be explicitly specified.")

     if not env.get('ANDROID_VERSION'):
        raise Exception("Error: Android version must be explicitly specified.")

     env['OFFTARGET_ANDROID'] = True

     elf_h_location = os.path.join(env.get('NDK_PATH'),
                                   'toolchains',
                                   'llvm',
                                   'prebuilt',
                                   'linux-x86_64',
                                   'sysroot',
                                   'usr',
                                   'include',
                                   'elf.h')
     

     ndk_toolchain_path = os.path.join(env.get('NDK_PATH'),
                                       'toolchains',
                                       'llvm',
                                       'prebuilt',
                                       'linux-x86_64',
                                       'bin')
                                       
     if env['PROC'] == 'x86-32':
        prefix = 'i686-linux-android'
     else:
        prefix = 'x86_64-linux-android'

     ndk_inc_paths = [
        env.get('NDK_PATH') + '/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include',
        env.get('NDK_PATH') + '/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/c++/v1/',
        env.get('NDK_PATH') + '/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/local/include'
     ]

     ndk_analyzer_path = env.get('NDK_PATH') + '/toolchains/llvm/prebuilt/linux-x86_64/libexec/'

     if not env.WhereIs(prefix + env.get('ANDROID_VERSION') + '-clang', ndk_toolchain_path):
        raise Exception("Error: Cannot find compiler in NDK toolchain specified.")

     clang_cc = env.WhereIs(prefix + env.get('ANDROID_VERSION') + '-clang', ndk_toolchain_path)
     ccc_analyzer = ndk_analyzer_path + 'ccc-analyzer'

     clang_cxx = env.WhereIs(prefix + env.get('ANDROID_VERSION') + '-clang++', ndk_toolchain_path)
     cxx_analyzer = ndk_analyzer_path + 'c++-analyzer'
     
     env.Replace(LINK      = clang_cc)
     env.Replace(AR        = env.WhereIs(prefix + '-ar', ndk_toolchain_path))
     env.Replace(AS        = env.WhereIs(prefix + '-as', ndk_toolchain_path))
     env.Replace(NMBIN     = env.WhereIs(prefix + '-nm', ndk_toolchain_path))
     env.Replace(RANLIB    = env.WhereIs(prefix + '-ranlib', ndk_toolchain_path))
     env.Replace(COV       = env.WhereIs("llvm-cov", ndk_toolchain_path))
     env.Replace(PROFDATA  = env.WhereIs("llvm-profdata", ndk_toolchain_path))

  else:
    env['OFFTARGET_ANDROID'] = False

    if env.get('OFFTARGET_LOCAL_CLANG'):
       clang_search_paths = search_paths + tools_bin_dir
    else:
       clang_search_paths = tools_bin_dir + search_paths

    if scan_build:
       clang_search_paths = [env.get('CLANG_SA_PATH')] + clang_search_paths
   
    #filter the ARM llvm path out of our search paths
    clang_search_paths = filter(lambda x: not x.startswith('/pkg/qct/software/llvm/release/arm/'), clang_search_paths)

    if not env.WhereIs('clang', path=clang_search_paths):
       raise Exception("ERROR: cannot find a suitable x86-64 compiler in $PATH! Did you install a clang+llvm 4.0.0+ toolchain?")

    clang_cc = env.WhereIs("clang", path = clang_search_paths)
    ccc_analyzer = env.WhereIs("ccc-analyzer", path = clang_search_paths)

    clang_cxx = env.WhereIs("clang++", path = clang_search_paths)
    cxx_analyzer = env.WhereIs("c++-analyzer", path = clang_search_paths)

    env.Replace(AR        = env.WhereIs("llvm-ar",       path = clang_search_paths))
    env.Replace(NMBIN     = env.WhereIs("llvm-nm",       path = clang_search_paths))
    env.Replace(LINK      = env.WhereIs("clang",         path = clang_search_paths))
    env.Replace(RANLIB    = env.WhereIs("llvm-ranlib",   path = clang_search_paths))
    env.Replace(AS        = env.WhereIs("llvm-as",       path = clang_search_paths))
    env.Replace(COV       = env.WhereIs("llvm-cov",      path = clang_search_paths))
    env.Replace(PROFDATA  = env.WhereIs("llvm-profdata", path = clang_search_paths))

  if scan_build:
    if not ccc_analyzer:
      raise Exception('clang analyzer script not found! Pass CLANG_SA_PATH=/path/to/ccc-analyzer or add this to your $PATH')

    if not cxx_analyzer:
      raise Exception('clang++ analyzer script not found! Pass CLANG_SA_PATH=/path/to/c++-analyzer or add this to your $PATH')

    # TODO: Setting the environment variables via 'os.environ['X'] = 'Y'' doesn't work.
    cc = "CCC_CC=" + clang_cc + " CLANG=" + clang_cc + " " + ccc_analyzer
    cxx = "CCC_CXX=" + clang_cxx + " CLANG_CXX=" + clang_cxx + " " + cxx_analyzer

  else:
    cc = clang_cc
    cxx = clang_cxx
     
  env.Replace(CC        = cc)
  env.Replace(CXX       = cxx)

  if CHECKING_TOOLCHAIN_EXISTS:
    return
  env.Replace(LINKFLAGS="")
  if not env.StandaloneSdk():
    env.Append(CPPPATH = [
      "${BUILD_ROOT}/build/cust",
      "${BUILD_ROOT}/build/ms",
    ])
  """ To fix the CCCOMSTR etc that use BUILDPATH to display the name of the file
  being compiled.  Without this it will display the old PROC value such as
  scorpion instead of 'x86-32'
  This should be fixed by changing config.py (maybe others too) to not use
  env.subst() - but I have no idea if that breaks everything or not, so for now...
  """
  buildpath = env.get('BUILDPATH',oldProc)
  env.Replace(BUILDPATH = buildpath.replace(oldProc, env['PROC']))


  if env['OFFTARGET_ANDROID']:
     for p in ndk_inc_paths:
        env.Append(CXX=' -I' + p)

     for p in ndk_inc_paths:
        if 'c++' not in p:
           env.Append(CC=' -I' + p)

  #XXX: klockwork doesnt properly support sysroot and gcc-toolchain and promptly dies because it can't find include
  #paths, so we'll add them all manually for now

  #We assume that, if one offtarget executable comes from /pkg/ssg/..., then they all do
  if env['CC'].startswith(tools_prefix):
    env['LD_LIBRARY_PATH_STR'] = ld_library_path_str
    env.Append(CXX=' --gcc-toolchain=${OFFTARGET_TOOLS_PREFIX}/usr/ --sysroot=${OFFTARGET_TOOLS_PREFIX} ')
    for p in inc_paths:
      env.Append(CXX=' -I' + p)

    env.Append(CC=' --gcc-toolchain=${OFFTARGET_TOOLS_PREFIX}/usr/ --sysroot=${OFFTARGET_TOOLS_PREFIX} -lstdc++ -lstdc++abi ')
    for p in inc_paths:
      if 'c++' not in p:
        env.Append(CC=' -I' + p)

    env.Append(LINKFLAGS= '  --gcc-toolchain=${OFFTARGET_TOOLS_PREFIX}/usr/ --sysroot=${OFFTARGET_TOOLS_PREFIX} -Wl,--dynamic-linker,${OFFTARGET_DYNAMIC_LD} ')#
    for path in ld_library_path:
      env.Append(LINKFLAGS=" -L{0} -Wl,-rpath,{0} ".format(path))

    #Klockwork messes with the LD_LIBRARY_PATH, which kills the offtarget toolchain. So append our LD_LIBRARY_PATH here so that
    #it occurs after the Klockwork LD_LIBRARY_PATH changes in order for our offtarget toolchain to actually work
    for env_var in ['CC','CXX','AR','NMBIN','RANLIB','AS','LINK','COV','PROFDATA',]:
      env[env_var] = ld_library_path_str + env[env_var]

    elf_h_location = '${OFFTARGET_TOOLS_PREFIX}/usr/include/elf.h'

  for env_var in ['CC','CXX','AR','NMBIN','RANLIB','AS','LINK']:
    if not env.get(env_var):
      print "ERROR: no executable found for offtarget {} in $PATH. Did you install a 4.0.0+ x86-64 clang+llvm toolchain?".format(env_var)
      sys.exit(1)

  if env.get('COV') and env.get('PROFDATA'):
    env['DO_LINE_COVERAGE'] = True

  print 'cc',env['CC']

  #TODO: are these necessary?
  env.Replace(NM = "${PYTHONCMD} ${BUILD_SCRIPTS_ROOT}/nm.py")
  env.Replace(PPASM = "${PYTHONCMD} ${BUILD_SCRIPTS_ROOT}/ppasm.py -g ")

  env.Replace(INCPREFIX = "-I")
  env.Replace(CPPDEFPREFIX  = "-D")
  env.Replace(OBJSUFFIX = ".o")

  env.Replace(SHLIBPREFIX = "lib")
  env.Replace(SHLIBSUFFIX = ".so")

  env.Replace(LIBPREFIX = "")
  env.Replace(LIBSUFFIX = ".lib")
  env.Replace(LIBSUFFIXES = ['$LIBSUFFIX', '.l', '.a', '$SHLIBSUFFIX'])
  env.Replace(LIBLINKPREFIX = "-l")
  env.Replace(DO_NOT_USE_LIBLINKSUFFIX = "")
  env.Replace(LIBDIRPREFIX = "-L ")
  env.Replace(PROGSUFFIX='.elf')
  env.Replace(LINKCOM1=smart_link)
  env.Replace(LINKCOM='$LINKCOM1')

  if env['PLATFORM'] in ['windows', 'win32']:
    env.Replace(MAXLINELENGTH = 32000)
  else:
    env.Replace(MAXLINELENGTH = 100000)

  env.Replace(TEMPFILEPREFIX = "@")
  env.Replace(TEMPFILESUFFIX = "")

  #"char" type is unsigned on ARM but signed on x86, so force unsigned for x86
  env.Append(CCFLAGS = " -funsigned-char ")
  env.Append(CFLAGS=" ")
  env.Append(CXXFLAGS=' -std=c++17 ')
  env.Replace(ASCPPFLAGS = " ")
  env.Replace(ASFLAGS = " ")
  env.Replace(ARFLAGS = " rcD  ")
  env.Replace(CPPDEFINES=[])
  env.Append(CPPDEFINES='OFFTARGET')
  if env['PROC'] == 'x86-32':
    env.Append(CCFLAGS= ' -m32 ')
    env.Append(LINKFLAGS= ' -m32 ')
  else:
    env.Append(CCFLAGS= ' -m64 ')
    env.Append(LINKFLAGS= ' -m64  ')

  if env['OFFTARGET_ANDROID']:
     env.Append(CPPDEFINES = 'OFFTARGET_ANDROID')

  env.Append(CPPDEFINES = 'ELF_HEADER=\\"' + elf_h_location + '\\"')

  env.Append(CCFLAGS=' -DCUST_H=\\"${CUST_H}\\"  ')


  CCCOM = "$CC $CFLAGS $CCFLAGS $_CCCOMCOM -c $SOURCES -o $TARGET -Wno-unused-command-line-argument "

  env.Replace(CCCOM =       CCCOM)
  env.Replace(CCPPCOM =     CCCOM.replace('-c','-E -xc', 1))
  env.Replace(CCCOMCPY =    CCCOM)
  env.Replace(CCPPCLCOM =   "$PPASM -f $SOURCES -o $TARGET")
  env.Replace(CCPPCL_ACOM = "$PPASM -f ${TARGET}.pp -o ${TARGET}.i")

  CXXCOM = "$CXX $CXXFLAGS $CCFLAGS $_CCCOMCOM  -c $SOURCES -o $TARGET -Wno-unused-command-line-argument "
  env.Replace(CXXCOM =       CXXCOM)
  env.Replace(CXXCOMCPY =    CXXCOM)
  env.Replace(CXXPPCOM =     CXXCOM.replace('-c','-E -xc++', 1))
  env.Replace(CXXPPCLCOM =   env['CCPPCLCOM'])
  env.Replace(CXXPPCL_ACOM = env['CCPPCL_ACOM'])

  env.Replace(ARCOM =      "$AR $ARFLAGS $TARGET $SOURCES")

  env.Replace(ASCPPCOM =  "$CC $ASCPPFLAGS $_CCCOMCOM -E -xc $SOURCES -o ${TARGET}.pp")
  env.Replace(ASASCOM =   "$AS $ASFLAGS ${TARGET}.i -o $TARGET")

  AsmPreprocessAction = SCons.Action.Action('$ASCPPCOM', '$ASCPPCOMSTR')
  AsmCleanAction = SCons.Action.Action('$CCPPCL_ACOM', '$CCPPCLCOM_ASTR')
  AsmAssemblyAction = SCons.Action.Action('$ASASCOM', '$ASASCOMSTR')

  env.Replace(ASCOM = [
    AsmPreprocessAction,                   # C pre-process assembly files
    AsmCleanAction,                        # Removed junck generated by C preprocess
    AsmAssemblyAction,                     # Do the actuall assymbly
  ])

  if env.StandaloneSdk():
    env.Tool('comcc_addt',toolpath=['$SDK_ROOT/scripts'])
  else:
    env.LoadToolScript("${BUILD_SCRIPTS_ROOT}/comcc_addt.py")


  #fastcpp may not exist if using system scons
  try:
    env.Tool('fastcpp')
  except:
    pass

  if env.get('OFFTARGET_DEBUG'):
    # awaiting support for "-Og" (future work as per doc)
    # https://clang.llvm.org/docs/CommandGuide/clang.html
    # using "-O0" until then
    env.Append(CCFLAGS=' -ggdb -O0 ')
  elif env.get('OFFTARGET_RELEASE'):
    print "offtarget_release"
    env.Append(CCFLAGS=' -g0 -O3 ')
    env.Append(LINKFLAGS=' -s -Wl,-s ')
    env.Append(CCCOM=' -fno-function-sections -fno-data-sections ')
    env.Append(CXXCOM=' -fno-function-sections -fno-data-sections ')
  else:
    #Allow debugging for all symbols when we didn't explicitly set release or debugging
    #release is always set for external versions of the SDK, so this is ok
    env.Append(CCFLAGS= ' -g ')

  if env.get('OFFTARGET_WEVERYTHING'):
    env.Prepend(CCFLAGS=' -Wno-error -Weverything -pedantic -Wno-documentation \
    -Wno-gnu-zero-variadic-macro-arguments -Wno-unused-parameter -Wno-unused-macros -Wno-missing-prototypes -Wno-reserved-id-macro \
    -Wno-newline-eof -Wno-documentation-unknown-command -Wno-dollar-in-identifier-extension -Wno-unused-variable \
    -Wno-strict-prototypes    ')

  if env.DoLineCoverage():
    env.Append(CCFLAGS=' -fprofile-instr-generate -fcoverage-mapping ')
    env.Append(LINKFLAGS=' -fprofile-instr-generate -fcoverage-mapping ')

  #cmdline_option <> tuple(CCFLAGS to add, recover flags to add)
  options = {
    'OFFTARGET_ASAN':      'address',
    'OFFTARGET_UBSAN':     'undefined',
    'OFFTARGET_MSAN':      'memory',
    'OFFTARGET_THREADSAN': 'thread',
    'OFFTARGET_FUZZER':    'fuzzer',
    }
  sanitizer_vars = [ 'OFFTARGET_' + name for name in ['ASAN','UBSAN','MSAN','THREADSAN', 'FUZZER']]
  enabled_sanitizer = get_enabled_sanitizer(env, sanitizer_vars)
  if env['PROC'] != 'x86-64' or not enabled_sanitizer:
    env.Append(LINKFLAGS=' -Wl,-z,defs ')
  else:
    env.Append(CCFLAGS=' -fno-omit-frame-pointer -fPIE -fpic ')
    env.Append(LINKFLAGS='  -fPIE -fpic ')

    norecover = env.get('OFFTARGET_SANITIZER_NO_RECOVER')
    sanitizer_flags = ''
    enabled_sanitizer_list = []

    for enabled in enabled_sanitizer:
      env.Append(CPPDEFINES=enabled)
      sanitizer_name = options[enabled]
      enabled_sanitizer_list.append(sanitizer_name)
      if sanitizer_name == 'address':
        sanitizer_flags += ' -fsanitize-address-use-after-scope '
      if sanitizer_name == 'thread' and not norecover:
        print "WARNING! Thread Sanitizer does not support recovery! (Probably. Either that or the clang documentation lies)"
    sanitizer_flags += ' -fsanitize={} '.format(','.join(enabled_sanitizer_list))
    try:
      enabled_sanitizer_list.remove('fuzzer')
    except ValueError:
      pass
    #The clang documentation lies about recovery options and what they mean
    #You *always* need to specify -fsanitize=..., then add the recover/no-recover switch
    #Thread sanitizer appears to not support recovery
    sanitizer_flags += ' -f{}sanitize-recover={} '.format('no-' if norecover else '', ','.join(enabled_sanitizer_list))
    sanitizer_flags += ' -f{}sanitize-recover=all '.format('no-' if norecover else '')

    env.Append(CCFLAGS= sanitizer_flags)
    env.Append(LINKFLAGS= sanitizer_flags)

def get_sanitizer_commandline_options(env):
  llvm_symbolizer = "${OFFTARGET_TOOLS_PREFIX}/usr/lib/llvm-6.0/bin/llvm-symbolizer"
  ret = ' '
  halt = 'halt_on_error=' + ('1' if env.get('OFFTARGET_SANITIZER_NO_RECOVER') else '0')
  if env.get('OFFTARGET_UBSAN'):
    ret += "UBSAN_OPTIONS=print_stacktrace=1:" + halt + " UBSAN_SYMBOLIZER_PATH=" + llvm_symbolizer
    ret += ' '
  if env.get('OFFTARGET_ASAN'):
    ret += "LSAN_OPTIONS=detect_leaks=1:verbosity=0:log_threads=1:" + halt + " ASAN_OPTIONS=verbosity=0:detect_leaks=1:" + halt + " ASAN_SYMBOLIZER_PATH=" + llvm_symbolizer
    ret += ' '
  if env.get('OFFTARGET_THREADSAN'):
    ret += "TSAN_OPTIONS=" + halt + ":verbose=1:external_symbolizer_path=" + llvm_symbolizer
    ret += ' '
  return ret

def do_linecoverage(env):
  #we only do line coverage for 64 bit as the standard 64 bit clang binary distribution
  #doesnt have the requisite libraries for doing code coverage for 32 bit binaries
  return env.get('OFFTARGET_LINECOVERAGE') and env['PROC'] == 'x86-64' and env.get('DO_LINE_COVERAGE')