爲什麼我在cygwin中遇到錯誤？

static jboolean libinit(JNIEnv *env, jobject obj, jint sdk) { 
/* 
#include <sys/system_properties.h> 
    int sdk; 
    char c[PROP_VALUE_MAX]; 
if(__system_property_get("ro.build.version.sdk",c) > 0) sscanf(c,"%d",&sdk); 
else sdk = 8; 
*/ 
    __android_log_print(ANDROID_LOG_INFO,"liblossless","libinit: sdk=%d",sdk); 
    if(!libhandle) { 
     if(sdk < 8) libhandle = dlopen("/data/data/net.avs234/lib/libatrack8.so",  RTLD_NOW); 
     else libhandle = dlopen("/data/data/net.avs234/lib/libatrack9.so", RTLD_NOW); 
    if(libhandle) { 
     libmedia_pause = (typeof(libmedia_pause))  dlsym(libhandle,"libmedia_pause"); 
    libmedia_resume = (typeof(libmedia_resume)) dlsym(libhandle,"libmedia_resume"); 
    libmedia_start = (typeof(libmedia_start)) dlsym(libhandle,"libmedia_start"); 
    libmedia_stop = (typeof(libmedia_stop)) dlsym(libhandle,"libmedia_stop"); 
    libmedia_write = (typeof(libmedia_write)) dlsym(libhandle,"libmedia_write"); 
    libmediacb_start = (typeof(libmediacb_start)) dlsym(libhandle,"libmediacb_start"); 
    libmediacb_stop = (typeof(libmediacb_stop)) dlsym(libhandle,"libmediacb_stop"); 
     libmediacb_write = (typeof(libmediacb_write)) dlsym(libhandle,"libmediacb_write"); 
       libmediacb_wait_done = (typeof(libmediacb_wait_done))   dlsym(libhandle,"libmediacb_wait_done"); 
     } 
    } 
    __android_log_print(ANDROID_LOG_INFO,"liblossless","libinit: handle=%p",libhandle); 
    return libhandle != 0; 
} 

static jboolean libexit(JNIEnv *env, jobject obj) { 
    int ret = 0; 
    __android_log_print(ANDROID_LOG_INFO,"liblossless","libexit"); 
    if(libhandle) { 
     ret = dlclose(libhandle) ? 0 : 1; 
     libhandle = 0; 
    } 
    return ret; 
}

使用Cygwin編譯給我一個錯誤：爲什麼我在cygwin中遇到錯誤？

/cygdrive/C/androidndk4/apps/lossless/project/bin/ndk/local/armeabi/objs/lossles

S/main.o：在功能libexit': /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:247: undefined referenc e to dlclose」 /cygdrive/C/androidndk4 /應用/無損/項目/斌/ NDK /本地/ armeabi/OBJ文件/ lossles S/main.o：在功能libinit': /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:226: undefined referenc e to的dlopen ' /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:228：未定義和借鑑 E要dlsym' /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:229: undefined referenc e to對dlsym' /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c：230：undefined referenc E要dlsym' /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:231: undefined referenc e to對dlsym ' /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:232：未定義和借鑑 E要dlsym' /cygdrive/C/androidndk4/apps/lossless/project/bin/ndk/local/armeabi/objs/lossles s/main.o:/cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:233: more unde fined references to對dlsym' 跟隨 /cygdrive/C/androidndk4 /應用/無損/項目/斌/ NDK /本地/ armeabi/OBJ文件/ lossles S/main.o：在功能libinit': /cygdrive/C/androidndk4/apps/lossless/project/jni/main.c:225: undefined referenc e to的dlopen」 collect2：LD返回1個退出狀態化妝：* [/ cygdrive/C/androidndk4 /應用/無損/ project/bin/ndk/local/armeabi/l iblossless.so]錯誤1

來源

2011-05-27 user722641

您的錯誤提及'未定義的引用'。這意味着你正在使用的函數（dlopen，dlclose，dlsym等）沒有被定義。檢查你是否包含正確的頭文件，並檢查你是否正確鏈接到所需的庫，如果這些函數來自共享庫。

來源

2011-05-27 16:17:19

我是一個初學者，如何在頭文件中包含？非常感謝您的回答。 – user722641 2011-05-27 17:18:56

如果有人有一個想法......我等待 – user722641 2011-05-28 05:30:11

語法是：#include 因此，在你的情況下，找到哪些頭文件這些dl *函數在，幷包括它們。 – 2011-05-31 15:28:38

爲什麼我在cygwin中遇到錯誤？

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