编译大会的android [英] Compiling Assembly for android
问题描述
我发现由维克拉姆AGGARWAL了一篇文章，谈到联大会code到Android的NDK，其中甚至有一些例如code这显示了如何将C ++ code。与大会交流。
（请参见 http://www.eggwall.com/2011 /09/android-arm-assembly-calling-assembly.html ）
我的问题是，我想用同样的功能，但不是从JNI存根类调用它，我想从我的私人类叫我装配的功能。
但在编译，我得到的错误：
错误：'armFunction没有在这个范围内声明
有没有人试过这种或有任何想法如何解决这个问题？
编辑：
的Makefile：
LOCAL_PATH：= $（叫我-DIR）
包括$（CLEAR_VARS）
LOCAL_MODULE：= QUAKE3＃我想ARM，而不是大拇指。
LOCAL_ARM_MODE：=手臂LOCAL_SRC_FILES：= \\
multiple.s \\
macros.h \\
数学/ Vector2.cpp \\
数学/ Vector3.cpp \\
数学/ plane.cpp \\
发动机/ frustum.cpp \\
发动机/ BoundingVolume.cpp \\
发动机/ camera.cpp \\
相机proxy.cpp \\LOCAL_CFLAGS：= -DANDROID_NDK \\
-DDISABLE_IMPORTGL \\LOCAL_LDLIBS：= -lGLESv1_CM -ldl -llog
#LOCAL_LDLIBS：= -llog -lGLESv2APP_STL：= gnustl_static
APP_CPPFLAGS：= -S -frtti -fexceptions
APP_ABI：= armeabi armeabi，V7A包括$（BUILD_SHARED_LIBRARY）
在CPP文件函数调用：
无效
Java_surreal_quake3_engine_Camera9_nativeGetDirection（JNIEnv的* ENV，jobject THIZ）
{
//摄像头*摄像头=（相机*）env-＆GT; GetIntField（THIZ，pointerID）; //获取_Z为的Vector3 java对象
jfieldID vector_fID = env-＆GT; GetFieldID（CLS，_Z，Lsurreal /库/数学/的Vector3;）;
jobject vector_obj = env-＆GT; GetObjectField（THIZ，vector_fID）; //呼吁_vecEye setter方法
// JCLASS vectorClass = env-＆GT;的findClass（超现实主义/库/数学/的Vector3）;
jmethodID vector3_set = env-＆GT;的GetMethodID（vector3Class设置/ *方法名* /（FFF）V/ *方法签名* /）;
env-＆GT; CallVoidMethod（vector_obj，vector3_set，CAMERA-GT＆;盖茨（）X，CAMERA-方式＆gt;盖茨（）Y，CAMERA-方式＆gt;盖茨（）z的）; INT结果= armFunction（）;
}
综观类code，好像你调用函数，但我看不到它的任何声明，因此它是未能识别。因此，你需要调用它（在C ++类）之前有函数原型的声明：
是这样的：
INT armFunction（无效）; //＆LT;＆LT;宣言无效Java_surreal_quake3_engine_Camera9_nativeGetDirection（JNIEnv的* ENV，jobject THIZ）
{
//喀嚓 - 管理单元
INT结果= armFunction（）; //＆LT;＆LT;你的函数调用
}
I found an article by Vikram Aggarwal that talks about linking Assembly code into Android's NDK, which even has some example code which shows how to connect the C++ code with Assembly. ( see http://www.eggwall.com/2011/09/android-arm-assembly-calling-assembly.html )
My problem is that I want to use the same function but instead of calling it from JNI stub class, I want to call my Assembly function from my private class.
But on compilation, I get the error:
error: 'armFunction' was not declared in this scope
Has anyone tried this or have any idea how to resolve this ?
Edit:
Makefile:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := quake3
# I want ARM, not thumb.
LOCAL_ARM_MODE := arm
LOCAL_SRC_FILES := \
multiple.s \
macros.h \
math/Vector2.cpp\
math/Vector3.cpp\
math/plane.cpp\
engine/frustum.cpp\
engine/BoundingVolume.cpp\
engine/camera.cpp\
camera-proxy.cpp\
LOCAL_CFLAGS := -DANDROID_NDK \
-DDISABLE_IMPORTGL \
LOCAL_LDLIBS := -lGLESv1_CM -ldl -llog
#LOCAL_LDLIBS := -llog -lGLESv2
APP_STL := gnustl_static
APP_CPPFLAGS := -S -frtti -fexceptions
APP_ABI := armeabi armeabi-v7a
include $(BUILD_SHARED_LIBRARY)
Function call in cpp file:
void
Java_surreal_quake3_engine_Camera9_nativeGetDirection(JNIEnv* env, jobject thiz)
{
//Camera* camera = (Camera*) env->GetIntField(thiz, pointerID);
// get the _Z as the Vector3 java object
jfieldID vector_fID = env->GetFieldID(cls, "_Z", "Lsurreal/libs/math/Vector3;");
jobject vector_obj = env->GetObjectField(thiz, vector_fID);
// call the setter methods on the _vecEye
//jclass vectorClass = env->FindClass("surreal/libs/math/Vector3");
jmethodID vector3_set = env->GetMethodID(vector3Class, "set"/*method-name*/, "(FFF)V" /*method-signature*/);
env->CallVoidMethod(vector_obj, vector3_set, camera->getZ().x, camera->getZ().y, camera->getZ().z);
int result = armFunction();
}
Looking at the code of the class, it seems like you call the function, but I can't see any declaration of it, so it is not recognized. So you need to have a declaration of the function's prototype before calling it (in the C++ class):
Something like:
int armFunction(void); // << declaration
void Java_surreal_quake3_engine_Camera9_nativeGetDirection(JNIEnv* env, jobject thiz)
{
// snip - snap
int result = armFunction(); // << your function call
}
这篇关于编译大会的android的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
