checking system environment variables

README.md

@@ -11,6 +11,24 @@ This project is used to develop the next version deep learning freamwork for mob
 
 [Used model in development](https://mms-mis.cdn.bcebos.com/paddle-mobile/models.zip)
 
+## cross-compilation to android
+
+* NDK is required
+* ANDROID_NDK environment variable is required
+
+```bash 
+sh build.sh android
+```
+
+## build for x86
+paddle-mobile is to run on arm platform. x86 only used to test not arm assembly code. So do not recommend compiling x86.
+
+Now only support osx.
+
+```
+sh build.sh mac
+```
+
 ## Old Version of Mobile-Deep-Learning
 The old version of MDL was I moved to here [Mobile-Deep-Learning](https://github.com/allonli/mobile-deep-learning) 
 

build.sh

 #!/bin/bash
 
-. /etc/profile
-. ~/.bashrc
-#. ~/.zshrc
-
-build_for_linux() {
-}
+if [ -f "~/.bashrc" ] ; then
+    . ~/.bashrc
+elif [ -f "~/.bash_profile" ] ; then
+   ~/.bash_profile
+elif [ -f "~/.zshrc" ] ; then
+   . ~/.zshrc
+else
+   echo "not found user environment. load /etc/profile"
+   . /etc/profile
+fi
 
 build_for_mac() {
     if [ ! `which brew` ]; then