How to compile the multithread code with gcc

Question

I have seen the given two makefiles as follows:

all: thread1 thread2 thread3

CFLAGS=-I/usr/include/nptl -D_REENTRANT
LDFLAGS=-L/usr/lib/nptl -lpthread

clea         


        

Answer 1

Your question is answered here

gcc: Do I need -D_REENTRANT with pthreads?

Essentially all you need is

gcc thread1.c -o thread1 -pthread

and gcc will handle all the defines for you.