Build V8 for Android IA

tools/android-envsetup.sh

+#!/bin/bash
+# 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
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+if [ ${#@} -lt 1 ] ; then
+  echo "Error: architecture (arm|ia32) required"
+  return 1
+fi
+
+ARCH=$1
+
+if [ ! -d "${ANDROID_NDK_ROOT}" ]; then
+  echo "ANDROID_NDK_ROOT must be set to the path of Android NDK, Revision 8." \
+    >& 2
+  return 1
+fi
+
+host_os=$(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')
+
+case "${host_os}" in
+  "linux")
+    toolchain_dir="linux-x86"
+    ;;
+  *)
+    echo "Host platform ${host_os} is not supported" >& 2
+    return 1
+esac
+
+case "${ARCH}" in
+  "arm")
+    DEFINES=" target_arch=arm v8_target_arch=arm android_target_arch=arm"
+    DEFINES+=" arm_neon=0 armv7=1"
+    toolchain_arch="arm-linux-androideabi-4.4.3"
+    ;;
+  "ia32")
+    DEFINES=" target_arch=ia32 v8_target_arch=ia32 android_target_arch=x86"
+    toolchain_arch="x86-4.4.3"
+    ;;
+  *)
+    echo "Architecture: ${ARCH} is not supported." >& 2
+    echo "Current supported architectures: arm|ia32." >& 2
+    return 1
+esac
+
+toolchain_path="${ANDROID_NDK_ROOT}/toolchains/${toolchain_arch}/prebuilt/"
+export ANDROID_TOOLCHAIN="${toolchain_path}/${toolchain_dir}/bin/"
+if [ ! -d "${ANDROID_TOOLCHAIN}" ]; then
+  echo "Can not find Android toolchain in ${ANDROID_TOOLCHAIN}." >& 2
+  echo "The NDK version might be wrong." >& 2
+  return 1
+fi
+
+# The set of GYP_DEFINES to pass to gyp. 
+export GYP_DEFINES="${DEFINES}"

[Jakob Kummerow, 2012/07/17 16:29:57]

I don't like that GYP_DEFINES are overridden here. People might use that
environment variable to store their default options.
On the other hand, if you append to the variable, 'source'ing this script twice
in the same shell will create a mess... Still, I think I'd prefer appending.
[Other potential solutions I can think of that are more work:
(1) Use this script as a wrapper around 'make', obviating the need to override
the calling shell's environment?
(2) Specifically filter conflicting definitions from the existing GYP_DEFINES,
then append the new DEFINES?
]