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

If your code don't have external dependencies beyond pthread:

gcc thread1.c -o thread1 -D_REENTRANT -lpthread

Quote:

Defining _REENTRANT causes the compiler to use thread safe (i.e. re-entrant) versions of several functions in the C library.