android中 JIN编译报错
16lz
2021-12-04
android中 JIN编译报错
编译报错： fatal error: string: No such file or directory
在开发一个测试用例时，需要用到一个JIN去调用底层借口，JIN文件为：otp_rw.cpp，然后相关makefile如下:
include $(CLEAR_VARS)# This is the target being built.LOCAL_MODULE:= libnative-libLOCAL_MODULE_TAGS := optional# All of the source files that we will compile.LOCAL_SRC_FILES:= \ native-lib.cpp\# All of the shard libraries we link against.LOCAL_SHARED_LIBRARIES := liblog# Also need the JNI headers.LOCAL_C_INCLUDES += \ $(JNI_H_INCLUDE)include $(BUILD_SHARED_LIBRARY)编译时，出现错误。
- fatal error: string: No such file or directory
target thumb C++: libOTP_rw_test <= development/apps/project/jni/otp_rw.cppdevelopment/apps/project/jni/otp_rw.cpp:14:18: fatal error: string: No such file or directory #include 从log上来看是不能识别string，推测是缺少相应的依赖。
2. error: cast to ‘unsigned char *’ from smaller integer type ‘int’
development/apps/project/jni/otp_rw.cpp:356:25: error: cast to 'unsigned char *' from smaller integer type 'int' [-Werror,-Wint-to-pointer-cast] uint8_t *database = (uint8_t *)GetBuffer(&size);从log上来看是将int型转换成unsigned char *指针类型，而int太小了。后面将int强制转换成long后再cast to 'unsigned char *好像可以解决这个问题。
最后通过添加STL支持，问题一 和问题二 都可以解决具体修改如下：
include $(CLEAR_VARS)# This is the target being built.LOCAL_MODULE:= libnative-libLOCAL_MODULE_TAGS := optionalLOCAL_LDFLAGS += -ldlLOCAL_C_INCLUDES += \ bionic \ bionic/libstdc++/include \ external/stlport/stlport# All of the source files that we will compile.LOCAL_SRC_FILES:= \ native-lib.cpp\# All of the shard libraries we link against.LOCAL_SHARED_LIBRARIES := liblogAPP_STL := stlport_static# Also need the JNI headers.LOCAL_C_INCLUDES += \ $(JNI_H_INCLUDE)include $(BUILD_SHARED_LIBRARY)更多相关文章
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