谁有C++调试常识及技巧方面的资料？

chb79

我今天刚接触Unix下的C＋＋编程，拿一个源程序试了一下，结果出现一些 warning:
"CHKV_main.cpp", line 47: Warning: String literal converted to char* in formal .
"CHKV_main.cpp", line 66: Warning: String literal converted to char* in formal .
"CHKV_main.cpp", line 85: Warning: String literal converted to char* in formal .
"CHKV_main.cpp", line 105: Warning: String literal converted to char* in formal.
"CHKV_main.cpp", line 158: Warning: String literal converted to char* in formal.
"CHKV_main.cpp", line 177: Warning: String literal converted to char* in formal.
6 Warning(s) detected.
Undefined                       first referenced
symbol                             in file
CHKV_wrlog::CHKV_wrlog()              CHKV_main.o
int CF_CEnvFile::readEnvVarFromFile() CHKV_main.o
int CHKV_manager::connectToDB(char*,char*) CHKV_main.o
int CHKV_wrlog::write_wrlog(const char*,const char*) CHKV_main.o
int CHKV_manager::loadEnv(long&    CHKV_main.o
int CHKV_manager::work()         CHKV_main.o
CHKV_manager::CHKV_manager()            CHKV_main.o
void CF_CEnvFile::getenv(char*)      CHKV_main.o
void CF_CEnvFile::getenv(long&      CHKV_main.o
CHKV_manager::~CHKV_manager()            CHKV_main.o
int CHKV_wrlog::set_wrlog(char*)    CHKV_main.o
int CHKV_manager::init(char*,char*,char*)     CHKV_main.o
CHKV_wrlog::~CHKV_wrlog()              CHKV_main.o
CF_CEnvFile::CF_CEnvFile(char*,char*)          CHKV_main.o
int CHKV_manager::disconnectDB() CHKV_main.o
int CHKV_manager::loadTables()   CHKV_main.o
ld: fatal: Symbol referencing errors. No output written to a.out

在Unix下有warning，是不是就不能编译成功？不想Ms-vc++下的那样，warning可以忽略的

另外，int CHKV_manager::disconnectDB() CHKV_main.o 这种信息什么意思啊？

新手的问题总是很弱，请不要见笑！