Fix android_arm build hosted on Mac

build/standalone.gypi

 # Copyright 2012 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 244 matching lines @@
       }],
       ['OS=="android"', {
         # Location of Android NDK.
         'variables': {
           'variables': {
             # The Android toolchain needs to use the absolute path to the NDK
             # because it is used at different levels in the GYP files.
             'android_ndk_root%': '<(base_dir)/third_party/android_tools/ndk/',
             'android_host_arch%': "<!(uname -m | sed -e 's/i[3456]86/x86/')",
             'host_os%': "<!(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')",
+            'os_folder_name%': "<!(uname -s | sed -e 's/Linux/linux/;s/Darwin/darwin/')",
           },
 
           # Copy conditionally-set variables out one scope.
           'android_ndk_root%': '<(android_ndk_root)',
           'host_os%': '<(host_os)',
+          'os_folder_name%': '<(os_folder_name)',
 
           'conditions': [
             ['target_arch == "ia32"', {
-              'android_toolchain%': '<(android_ndk_root)/toolchains/x86-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_toolchain%': '<(android_ndk_root)/toolchains/x86-4.9/prebuilt/<(os_folder_name)-<(android_host_arch)/bin',
               'android_target_arch%': 'x86',
               'android_target_platform%': '16',
+              'arm_version%': 'default',
             }],
             ['target_arch == "x64"', {
-              'android_toolchain%': '<(android_ndk_root)/toolchains/x86_64-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_toolchain%': '<(android_ndk_root)/toolchains/x86_64-4.9/prebuilt/<(os_folder_name)-<(android_host_arch)/bin',
               'android_target_arch%': 'x86_64',
               'android_target_platform%': '21',
+              'arm_version%': 'default',
             }],
             ['target_arch=="arm"', {
-              'android_toolchain%': '<(android_ndk_root)/toolchains/arm-linux-androideabi-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_toolchain%': '<(android_ndk_root)/toolchains/arm-linux-androideabi-4.9/prebuilt/<(os_folder_name)-<(android_host_arch)/bin',
               'android_target_arch%': 'arm',
               'android_target_platform%': '16',
               'arm_version%': 7,
             }],
             ['target_arch == "arm64"', {
-              'android_toolchain%': '<(android_ndk_root)/toolchains/aarch64-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_toolchain%': '<(android_ndk_root)/toolchains/aarch64-linux-android-4.9/prebuilt/<(os_folder_name)-<(android_host_arch)/bin',
               'android_target_arch%': 'arm64',
               'android_target_platform%': '21',
               'arm_version%': 'default',
             }],
             ['target_arch == "mipsel"', {
-              'android_toolchain%': '<(android_ndk_root)/toolchains/mipsel-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_toolchain%': '<(android_ndk_root)/toolchains/mipsel-linux-android-4.9/prebuilt/<(os_folder_name)-<(android_host_arch)/bin',
               'android_target_arch%': 'mips',
               'android_target_platform%': '16',
+              'arm_version%': 'default',
             }],
             ['target_arch == "mips64el"', {
-              'android_toolchain%': '<(android_ndk_root)/toolchains/mips64el-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_toolchain%': '<(android_ndk_root)/toolchains/mips64el-linux-android-4.9/prebuilt/<(os_folder_name)-<(android_host_arch)/bin',
               'android_target_arch%': 'mips64',
               'android_target_platform%': '21',
+              'arm_version%': 'default',
             }],
           ],
         },
 
         # Copy conditionally-set variables out one scope.
         'android_target_arch%': '<(android_target_arch)',
         'android_target_platform%': '<(android_target_platform)',
         'android_toolchain%': '<(android_toolchain)',
         'arm_version%': '<(arm_version)',
         'host_os%': '<(host_os)',
@@ skipping 31 matching lines @@
             'android_libcpp_include': '<(android_stl)/llvm-libc++/libcxx/include',
             'android_libcpp_abi_include': '<(android_stl)/llvm-libc++abi/libcxxabi/include',
             'android_libcpp_libs': '<(android_stl)/llvm-libc++/libs',
             'android_support_include': '<(android_ndk_root)/sources/android/support/include',
             'android_sysroot': '<(android_sysroot)',
           }],
         ],
         'android_libcpp_library': 'c++_static',
       }],  # OS=="android"
       ['host_clang==1', {
+        'host_ld': '<!(which ld)',

[Jakob Kummerow, 2016/04/13 19:50:34]

This "which ld" (along with "which ranlib" right below) must be the one that the
Windows bots are complaining about. Is it necessary to have this? If yes, then
presumably it's only needed for Android builds, so how about moving it into the
OS=="android" section above, and/or guarding it with an appropriate host_os
check?

+        'host_ranlib': '<!(which ranlib)',
         'host_cc': '<(clang_dir)/bin/clang',
         'host_cxx': '<(clang_dir)/bin/clang++',
       }, {
+        'host_ld': '<!(which ld)',
+        'host_ranlib': '<!(which ranlib)',
         'host_cc': '<!(which gcc)',
         'host_cxx': '<!(which g++)',
       }],
     ],
     # Default ARM variable settings.
     'arm_version%': 'default',
     'arm_fpu%': 'vfpv3',
     'arm_float_abi%': 'default',
     'arm_thumb': 'default',
 
@@ skipping 814 matching lines @@
               '-Wl,--as-needed',
             ],
           }],
         ],  # target_conditions
       },  # target_defaults
     }],  # OS=="android"
     ['OS=="android" and clang==0', {
       # Hardcode the compiler names in the Makefile so that
       # it won't depend on the environment at make time.
       'make_global_settings': [
+        ['LD', '<!(/bin/echo -n <(android_toolchain)/../*/bin/ld)'],
+        ['RANLIB', '<!(/bin/echo -n <(android_toolchain)/../*/bin/ranlib)'],
         ['CC', '<!(/bin/echo -n <(android_toolchain)/*-gcc)'],
         ['CXX', '<!(/bin/echo -n <(android_toolchain)/*-g++)'],
+        ['LD.host', '<(host_ld)'],
+        ['RANLIB.host', '<(host_ranlib)'],
         ['CC.host', '<(host_cc)'],
         ['CXX.host', '<(host_cxx)'],
       ],
     }],
     ['clang!=1 and host_clang==1 and target_arch!="ia32" and target_arch!="x64"', {
       'make_global_settings': [
         ['CC.host', '<(clang_dir)/bin/clang'],
         ['CXX.host', '<(clang_dir)/bin/clang++'],
       ],
     }],
@@ skipping 183 matching lines @@
               '-fsanitize=cfi-vcall',
               '-fsanitize=cfi-derived-cast',
               '-fsanitize=cfi-unrelated-cast',
             ],
           }],
         ],
       },
     }],
   ],
 }