gcc compiling threaded programs need to bring -lpthread option (otherwise error: undefined reference to `pthread_create ')

Pthread_create program uses two functions, includes the header files #include <pthread.h>.

gcc xxx.c -o xxx

The following error when compiling:

 

 

 

analysis:

Usually you need to add additional options when using gcc compiler uses POSIX thread of the program to link to the library.

Direct plus -lpthread options here.

gcc xxx.c -o xxx -lpthread

Compile
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