import os
import re
import sys

which_gcc_popen = os.popen('which arm-eabi-gcc')
which_gcc = which_gcc_popen.readline().replace('\n','').replace('\r','')
which_gcc_popen.close()
m = re.match(r'(.+)/prebuilt/.+', which_gcc)
if not m:
    raise(Exception('incompatible or unavailable prebuilt gcc'))
DROID_ROOT = m.group(1)
DROID_TOOLCHAIN = which_gcc.replace('/bin/arm-eabi-gcc','')
print DROID_TOOLCHAIN
print 'DROID_ROOT =', DROID_ROOT

DROID_ALIB      = DROID_ROOT+'/out/target/product/generic/obj/lib'

droid_includes = ['system/core/include',
                  'hardware/libhardware/include',
                   'hardware/ril/include',
                   'dalvik/libnativehelper/include',
                   'frameworks/base/include',
                   'external/skia/include',
                   'out/target/product/generic/obj/include',
                   'bionic/libc/arch-arm/include',
                   'bionic/libc/include',
                   'bionic/libstdc++/include',
                   'bionic/libc/kernel/common',
                   'bionic/libc/kernel/arch-arm',
                   'bionic/libm/include',
                   'bionic/libm/include/arch/arm',
                   'bionic/libthread_db/include',
                   'bionic/libm/arm',
                   'bionic/libm',
                   'out/target/product/generic/obj/SHARED_LIBRARIES/libm_intermediates']

droid_extras = ['-include', DROID_ROOT+'/system/core/include/arch/linux-arm/AndroidConfig.h',
                '-march=armv5te',
                 '-mtune=xscale',
                 '-msoft-float',
                 '-mthumb-interwork',
                 '-fpic',
                 '-ffunction-sections',
                 '-funwind-tables',
                 '-fstack-protector',
                 '-fmessage-length=0',
                 '-fno-short-enums']

droid_extras_cpp = ['-fno-exceptions',
                    '-fno-rtti']

droid_defines = ['-DANDROID',
                 '-D__ARM_ARCH_5__',
                 '-D__ARM_ARCH_5T__',
                 '-D__ARM_ARCH_5E__',
                 '-D__ARM_ARCH_5TE__']


if env['build_config'] == 'Release':
    droid_optimize = ['-finline-functions',
                   '-finline-limit=300',
                   '-fno-inline-functions-called-once',
                   '-fgcse-after-reload',
                   '-frerun-cse-after-loop',
                   '-frename-registers',
                   '-fomit-frame-pointer',
                   '-fstrict-aliasing',
                   '-funswitch-loops']
else:
    droid_optimize = []

droid_link = ['-Bdynamic',
              '-Wl,-T,$DROID/build/core/armelf.x',
              '-Wl,-dynamic-linker,/system/bin/linker',
              '-Wl,--gc-sections',
              '-Wl,-z,nocopyreloc',
              '-Wl,--no-undefined',
              '-Wl,-rpath-link=' + DROID_ALIB,
              '-L' + DROID_ROOT,
              '-L' + DROID_ALIB,
              '-nostdlib',
              DROID_TOOLCHAIN+'/lib/gcc/arm-eabi/4.2.1/interwork/libgcc.a',
              '-lc',
              '-lstdc++',
              '-lm',
              '-lcutils',
              DROID_ALIB+'/crtbegin_dynamic.o', DROID_ALIB+'/crtend_android.o']

### Load the tools
LoadTool('gcc-generic', env, gcc_cross_prefix='arm-eabi', gcc_strict=False)

LoadTool('gcc-generic', env, gcc_cross_prefix='arm-eabi', gcc_strict=False)
env.AppendUnique(CCFLAGS = ['-I'+DROID_ROOT+'/'+x for x in droid_includes] + droid_extras + droid_defines + droid_optimize )
env.AppendUnique(CPPFLAGS = droid_extras_cpp)
env.AppendUnique(LINKFLAGS = droid_link)

env['NPT_SYSTEM_SOURCES']={'System/StdC':'NptStdc[!D]*.cpp',
                           'System/Bsd':'*.cpp',
                           'System/Posix':'*.cpp',
                           'System/Null':'NptNullSerialPort.cpp',
                           'System/Android':'*.cpp'}