make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf
make[1]: Entering directory `/d/_work/Welcome_1'
make  -f nbproject/Makefile-Debug.mk dist/Debug/MinGW-Windows/welcome_1.exe
make[2]: Entering directory `/d/_work/Welcome_1'
mkdir -p dist/Debug/MinGW-Windows
g++.exe     -o dist/Debug/MinGW-Windows/welcome_1 build/Debug/MinGW-Windows/welcome.o  
build/Debug/MinGW-Windows/welcome.o：在函数‘main’中：
D:\_work\Welcome_1/welcome.cc:36：对‘WSAStartup@8’未定义的引用
collect2: ld returned 1 exit status
make[2]: *** [dist/Debug/MinGW-Windows/welcome_1.exe] Error 1
make[2]: Leaving directory `/d/_work/Welcome_1'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/d/_work/Welcome_1'
make: *** [.build-impl] Error 2