如何在android.mk文件中指定C头文件 [英] How to specify c header file in android.mk file

问题描述

我的交流源文件夹名为"clib"，在该文件夹中，我有一些示例文件，例如1.h，1.c，2.h，2.c，3.c，3.h，在该文件夹之外我有4.h，4.c，4_jni.h，4_jni.c

i had a c source folder name "clib" and in that , i have some example files like 1.h ,1.c , 2.h ,2.c,3.c,3.h and out side that folder i have 4.h , 4.c , 4_jni.h , 4_jni.c

现在要构建".so"，我创建了这样的android.mk

Now to build ".so" i created my android.mk something like this

LOCAL_PATH := $(call my-dir) 
MY_PATH := $(LOCAL_PATH) 
include $(call all-subdir-makefiles) 
include $(CLEAR_VARS) 
LOCAL_PATH := $(MY_PATH) 
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog
LOCAL_MODULE := clib
TIME_SYNC_PATH := ../../../clib
LOCAL_SRC_FILES := \ 
                    4_jni.c \
                    4.c     \
                    $(TIME_SYNC_PATH)/1.c \
                    $(TIME_SYNC_PATH)/2.c \
                    $(TIME_SYNC_PATH)/3.c \
$(BUILD_SHARED_LIBRARY)

此处4.h包含1.h文件

所以我真正的问题是当我尝试构建.so文件时，它给了我这样的错误

So my real problem is when i tried to build .so file it gives me a error some like this

fatal error: 1.h: No such file or directory

fatal error: 1.h: No such file or directory

如果我从4.h中删除1.h，一切都很好，但是我有一个很大的c库 具有相同的文件夹结构，并且.h文件中的一些包含很少定义的marcos ....

if i remove the 1.h from 4.h , everything is building fine , but i had a large c library with same kind of folder structure , and some of .h file contains few marcos defined ....

因此，请提出任何建议如何在不同的文件夹中包含.h.

So Please any suggestion how to include .h which is in different folder..

推荐答案

您需要指定LOCAL_C_INCLUDES位置.

此变量保存您的头文件的位置，例如:

This variable holds the locations of your header files like :

LOCAL_C_INCLUDES := $(LOCAL_PATH)/src/include/

您当然可以指定多个位置:

You can of course specify multiple locations :

LOCAL_C_INCLUDES := $(LOCAL_PATH)/src/include/
LOCAL_C_INCLUDES += $(LOCAL_PATH)/project2/src/include/

请注意，当使用ndk-build实用程序评估此变量时，其值被认为是相对于$(LOCAL_PATH)的，因此在LOCAL_C_INCLUDES中给出路径时需要使用$(LOCAL_PATH).

Note that when this variable is evaluated by the ndk-build utility, its value is considered to be relative to $(LOCAL_PATH), so you need to use $(LOCAL_PATH) when giving a path in LOCAL_C_INCLUDES.

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