Cross compile with Node.js C++ Addons to ARM

Posted on May 10, 2018 by admin

Set ENV

```
export HOST=arm-linux-gnueabihf
```
```
export CPP="${HOST}-gcc -E"
```
```
export STRIP="${HOST}-strip"
```
```
export OBJCOPY="${HOST}-objcopy"
```
```
export AR="${HOST}-ar"
```
```
export RANLIB="${HOST}-ranlib"
```
```
export LD="${HOST}-ld"
```
```
export OBJDUMP="${HOST}-objdump"
```
```
export CC="${HOST}-gcc"
```
```
export CXX="${HOST}-g++"
```
```
export NM="${HOST}-nm"
```
```
export AS="${HOST}-as"
```
```
export LD="$CXX"
```
```
export LINK="$CXX"
```
```
export GYP_DEFINES="armv7=0"
```

Build

```
node-gyp --arch arm configure build
```

Test

```
root@imx6ul7d:~# node hello.js      
```
```
world
```

TIP 0

```
{
```
```
  "targets": [
```
```
    {
```
```
      "target_name": "addon",
```
```
      "sources": [ "test_api.cc" ],
```
```
	  "include_dirs" : ["sdk/inc"],
```

	  "link_settings": {"libraries": [ "-L/mnt/hgfs/tmp0511/sdk/lib"] },

	  "libraries": [ "-lpos", "-lpthread", "-lrt", "-lpng", "-liconv", "-lfreetype", "-lz" ],

```
    }
```
```
  ]
```
```
}
```

TIP 1

```
using v8::FunctionCallbackInfo;
```
```
using v8::Isolate;
```
```
using v8::Local;
```
```
using v8::Object;
```
```
using v8::String;
```
```
using v8::Value;
```
```
using v8::Number;
```
```
using v8::Exception;
```
```
 
```

void js_Exchange(const FunctionCallbackInfo<Value>& args) {

```
  Isolate* isolate = args.GetIsolate();
```
```
 
```
```
  int slot = args[0]->NumberValue();
```
```
 
```

  String::Utf8Value param1(args[1]->ToString());

```
  char *szApdu = *param1;  
```
```
 
```
```
  uint8_t apdu[300] = "\0";
```

  MyAHex((uint8_t *)szApdu, apdu, strlen(szApdu));

```
 
```
```
  uint8_t rpdu[300] = "\0";
```
```
  uint32_t rpdu_len = 0;
```
```
  char szResult[300] = "\0";
```
```
 
```

  int ret = Exchange(slot, apdu, strlen(szApdu) / 2, rpdu, &rpdu_len);

```
  if(0 == ret) {
```

    MyHexA(rpdu, (uint8_t *)szResult, rpdu_len);

    args.GetReturnValue().Set(String::NewFromUtf8(isolate, szResult));

```
  } else {
```

    args.GetReturnValue().Set(String::NewFromUtf8(isolate, ""));

```
  }
```
```
}
```

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