README-android.md

#POC: Embed node.js in an android application

On Linux (works on Linux and linux only, 22 jan 2015) Ubuntu in my case.

Build a node.js shared library (libnode.so) for embedding in android applications

You can find node_jni.{cc,h} in my project.

Apply these changes:

diff --git android-configure android-configure
index 7acb7f3..ffabab4 100755
--- android-configure
+++ android-configure
@@ -3,7 +3,7 @@
 export TOOLCHAIN=$PWD/android-toolchain
 mkdir -p $TOOLCHAIN
 $1/build/tools/make-standalone-toolchain.sh \
-    --toolchain=arm-linux-androideabi-4.7 \
+    --toolchain=arm-linux-androideabi-4.8 \
     --arch=arm \
     --install-dir=$TOOLCHAIN \
     --platform=android-9
@@ -12,8 +12,13 @@ export AR=arm-linux-androideabi-ar
 export CC=arm-linux-androideabi-gcc
 export CXX=arm-linux-androideabi-g++
 export LINK=arm-linux-androideabi-g++
+export PLATFORM=android # cares
+export OS=android # cares
 
 ./configure \
     --without-snapshot \
     --dest-cpu=arm \
-    --dest-os=android
+    --dest-os=android \
+    --without-npm
+    
+
diff --git deps/cares/android-configure deps/cares/android-configure
index 5299e5c..1d1e142 100755
--- deps/cares/android-configure
+++ deps/cares/android-configure
@@ -3,7 +3,7 @@
 export TOOLCHAIN=$PWD/android-toolchain
 mkdir -p $TOOLCHAIN
 $1/build/tools/make-standalone-toolchain.sh \
-    --toolchain=arm-linux-androideabi-4.7 \
+    --toolchain=arm-linux-androideabi-4.8 \
     --arch=arm \
     --install-dir=$TOOLCHAIN \
     --platform=android-9
diff --git deps/cares/cares.gyp deps/cares/cares.gyp
index dfa35a2..b975a4b 100644
--- deps/cares/cares.gyp
+++ deps/cares/cares.gyp
@@ -151,6 +151,7 @@
         [ 'OS=="android"', {
           'include_dirs': [ 'config/android' ],
           'sources': [ 'config/android/ares_config.h' ],
+          'defines': [ 'ANDROID', '__ANDROID__', 'DONT_HAVE_GETSERVBYPORT_R', 'HAVE_ARPA_NAMESER_H' ],
         }],
         [ 'OS=="solaris"', {
           'include_dirs': [ 'config/sunos' ],
diff --git deps/cares/config/android/ares_config.h deps/cares/config/android/ares_config.h
index 9e6ef3c..7818ee8 100644
--- deps/cares/config/android/ares_config.h
+++ deps/cares/config/android/ares_config.h
@@ -116,7 +116,11 @@
 #define HAVE_GETNAMEINFO 1
 
 /* Define to 1 if you have the getservbyport_r function. */
-#define HAVE_GETSERVBYPORT_R 1
+#ifndef DONT_HAVE_GETSERVBYPORT_R
+#  define HAVE_GETSERVBYPORT_R 1
+#else
+#  undef HAVE_GETSERVBYPORT_R
+#endif
 
 /* Define to 1 if you have the `gettimeofday' function. */
 #define HAVE_GETTIMEOFDAY 1
diff --git node.gyp node.gyp
index b59474e..d606c49 100644
--- node.gyp
+++ node.gyp
@@ -68,12 +68,13 @@
       'lib/zlib.js',
       'deps/debugger-agent/lib/_debugger_agent.js',
     ],
+    'java_home%': '<!(python -c "import os; dir=os.getenv(\'JAVA_HOME\', \'/usr/lib/jvm/java-7-openjdk-amd64\'); assert os.path.exists(os.path.join(dir, \'include/jni.h\')), \'Point \\$JAVA_HOME or the java_home gyp variable to a directory containing include/jni.h!\'; print dir")',
   },
 
   'targets': [
     {
       'target_name': 'node',
-      'type': 'executable',
+      'type': 'shared_library',
 
       'dependencies': [
         'node_js2c#host',
@@ -85,6 +86,7 @@
         'tools/msvs/genfiles',
         'deps/uv/src/ares',
         '<(SHARED_INTERMEDIATE_DIR)' # for node_natives.h
+        , '<(java_home)/include'
       ],
 
       'sources': [
@@ -99,7 +101,6 @@
         'src/node_file.cc',
         'src/node_http_parser.cc',
         'src/node_javascript.cc',
-        'src/node_main.cc',
         'src/node_os.cc',
         'src/node_v8.cc',
         'src/node_stat_watcher.cc',
@@ -151,6 +152,8 @@
         'src/util.h',
         'src/util-inl.h',
         'src/util.cc',
+        'src/node_jni.h',
+        'src/node_jni.cc',
         'deps/http_parser/http_parser.h',
         '<(SHARED_INTERMEDIATE_DIR)/node_natives.h',
         # javascript files to make for an even more pleasant IDE experience

Run these bash commands:

> git clone git@github.com:joyent/node.git
> git clone git@github.com:buggaboo/node-jni.git
> find node-jni/src-cpp/ -exec ln -s {} node/src/ \;
> cd node
> source ./android-configure
> mv ./android-toolchain/bin/python borkenPython && ln -s /usr/bin/python2.7 android-toolchain/bin/python
> virtualenv --system-site-packages venv # if missing: $(sudo pip install {git,...}) or $(sudo apt-get install {requests...})
> source ./venv/bin/activate
> make -j5

I arrived at -j5 by counting the number of cores + 1, to build this. Your mileage may vary.

You need virtualenv to install python modules that get broken by the symbolic linking of /usr/lib/python.

io.js

The same steps are required for building an io.js shared library, except for this extra bash command:

find . -name '*.mk' -exec sed -i '/-mfpu=vfpv2 \\/d' {} \; # in case you're building for plain armeabi

Source:

• The commit that got this ball rolling
• Compile from the master branch from github
• Support for android output
• Node stdout to android debug log