有关需求需要在recovery下读写imei svn，，但是通过读写nvram操作相关节点并不能成功，下面主要实现代码和编译异常，而且跟同事沟通的时候了解到即便是可以编译通过也无法调用libnvram.so的相关函数。若有大神路过，请指点一二。
实现代码：
//#include "../../../../external/nvram/libnvram/libnvram.h"//这里已经引入了相关的头文件#include "libnvram.h"#include "CFG_PRODUCT_INFO_File.h"//struct#include "Custom_NvRam_LID.h"//lid#include "CFG_module_file.h"//module
int read_write(){int result;F_ID imei_imeisv_nvram_id;int test_fd;int rec_size;int rec_num;nvram_ef_imei_imeisv_struct* imei_imeisv_struct;bool IsRead = true,IsWrite = false;printf("read:\n");imei_imeisv_nvram_id = NVM_GetFileDesc(AP_CFG_REEB_PRODUCT_INFO_LID, &rec_size, &rec_num,IsRead);//IsRead=trueif(imei_imeisv_nvram_id.iFileDesc < 0){printf("NVM_GetFileDesc failed\n");return 0;}result = read(imei_imeisv_nvram_id.iFileDesc,&imei_imeisv_struct,rec_num*rec_size);if(result != rec_num*rec_size){printf("Get file failed\n");return 0;}printf("———read———\n");printf("svn:%s\n",imei_imeisv_struct->svn);ui->Print("svn:%s\n",imei_imeisv_struct->svn);printf("——————\n");if(!NVM_CloseFileDesc(imei_imeisv_nvram_id)){printf("NVM_CloseFileDesc failed\n");}printf("write:\n");imei_imeisv_nvram_id = NVM_GetFileDesc(AP_CFG_REEB_PRODUCT_INFO_LID, &rec_size, &rec_num,IsWrite);//IsWrite=falseif(imei_imeisv_nvram_id.iFileDesc < 0){printf("NVM_GetFileDesc failed\n");return 0;}imei_imeisv_struct->svn = 55;printf("——–write———-\n");result = write(imei_imeisv_nvram_id.iFileDesc,&imei_imeisv_struct,rec_num*rec_size);if(result != rec_num*rec_size){printf("write file failed\n");return 0;}if(!NVM_CloseFileDesc(imei_imeisv_nvram_id)){printf("NVM_CloseFileDesc failed\n");} return 0;}Android.mk相关修改：
LOCAL_C_INCLUDES := $(MTK_PATH_SOURCE)/external/nvram/libnvramLOCAL_SHARED_LIBRARIES := libnvram下面是编译异常：
bootable/recovery/recovery.cpp:2088: error: undefined reference to 'NVM_GetFileDesc'bootable/recovery/recovery.cpp:2104: error: undefined reference to 'NVM_CloseFileDesc'bootable/recovery/recovery.cpp:2109: error: undefined reference to 'NVM_GetFileDesc'bootable/recovery/recovery.cpp:2121: error: undefined reference to 'NVM_CloseFileDesc'collect2: error: ld returned 1 exit status
人的不幸缘于欲望，所以知足者长乐。
