Change SConstruct to allow for easy specification of target library for arm c...

SConstruct

 # Copyright 2010 the V8 project authors. 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
@@ skipping 24 matching lines @@
 sys.path.append(join(root_dir, 'tools'))
 import js2c, utils
 
 # ANDROID_TOP is the top of the Android checkout, fetched from the environment
 # variable 'TOP'.   You will also need to set the CXX, CC, AR and RANLIB
 # environment variables to the cross-compiling tools.
 ANDROID_TOP = os.environ.get('TOP')
 if ANDROID_TOP is None:
   ANDROID_TOP=""
 
+# ARM_TARGET_LIB is the path to the dynamic library to use on the target
+# machine if cross-compiling to an arm machine. You will also need to set 
+# the additional cross-compiling environment variables to the cross compiler.
+ARM_TARGET_LIB = os.environ.get('ARM_TARGET_LIB')
+if ARM_TARGET_LIB:
+  ARM_LINK_FLAGS = ['-Wl,-rpath=' + ARM_TARGET_LIB + '/lib:' +
+                     ARM_TARGET_LIB + '/usr/lib',
+                    '-Wl,--dynamic-linker=' + ARM_TARGET_LIB +
+                    '/lib/ld-linux.so.3']
+else:
+  ARM_LINK_FLAGS = ""
+
 # TODO: Sort these issues out properly but as a temporary solution for gcc 4.4
 # on linux we need these compiler flags to avoid crashes in the v8 test suite
 # and avoid dtoa.c strict aliasing issues
 if os.environ.get('GCC_VERSION') == '44':
     GCC_EXTRA_CCFLAGS = ['-fno-tree-vrp', '-fno-strict-aliasing']
     GCC_DTOA_EXTRA_CCFLAGS = []
 else:
     GCC_EXTRA_CCFLAGS = []
     GCC_DTOA_EXTRA_CCFLAGS = []
 
@@ skipping 355 matching lines @@
       'CCFLAGS':      ANDROID_FLAGS,
       'CPPPATH':      ANDROID_INCLUDES,
       'LIBPATH':     [ANDROID_TOP + '/out/target/product/generic/obj/lib',
                       ANDROID_TOP + '/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/lib/gcc/arm-eabi/4.4.0/interwork'],
       'LINKFLAGS':    ANDROID_LINKFLAGS,
       'LIBS':         ['log', 'c', 'stdc++', 'm', 'gcc'],
       'mode:release': {
         'CPPDEFINES': ['SK_RELEASE', 'NDEBUG']
       }
     },
+    'arch:arm': {
+      'LINKFLAGS':   ARM_LINK_FLAGS
+    },
   },
   'msvc': {
     'all': {
       'CPPDEFINES': ['_HAS_EXCEPTIONS=0'],
       'LIBS': ['winmm', 'ws2_32']
     },
     'library:shared': {
       'CPPDEFINES': ['USING_V8_SHARED']
     },
     'arch:ia32': {
@@ skipping 44 matching lines @@
       'CCFLAGS':      ANDROID_FLAGS,
       'CPPPATH':      ANDROID_INCLUDES,
       'LIBPATH':     [ANDROID_TOP + '/out/target/product/generic/obj/lib',
                       ANDROID_TOP + '/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/lib/gcc/arm-eabi/4.4.0/interwork'],
       'LINKFLAGS':    ANDROID_LINKFLAGS,
       'LIBS':         ['log', 'c', 'stdc++', 'm', 'gcc'],
       'mode:release': {
         'CPPDEFINES': ['SK_RELEASE', 'NDEBUG']
       }
     },
+    'arch:arm': {
+      'LINKFLAGS':   ARM_LINK_FLAGS
+    },
     'arch:ia32': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32']
     },
     'arch:x64': {
       'CCFLAGS':      ['-m64'],
       'LINKFLAGS':    ['-m64']
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
@@ skipping 621 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()