/usr/bin/ld: zdatabase.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5'
/lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
makefile:23: recipe for target 'hello' failed
make: *** [hello] Error 1
readelf查看下pthread.so庫中的symbol