如何编译多线程code用gcc [英] How to compile the multithread code with gcc

问题描述

我见过的给出了两个makefile文件如下：

 所有：线程1线程2 thread3CFLAGS = -I / usr / include目录/ NPTL -D_REENTRANT
LDFLAGS = -L / usr / lib目录/ NPTL -lpthread清洁：
    RM -f线程1线程2 thread3######################所有：线程1线程2 thread3CFLAGS = -D_REENTRANT
LDFLAGS = -lpthread清洁：
    RM -f线程1线程2 thread3
 

如果不使用生成文件，有什么正确的命令行编译使用gcc的thread1.c是什么？

  

GCC -o线程1
  CFLAGS = -I / usr / include目录/ NPTL
  -D_REENTRANT LDFLAGS = -L / usr / lib目录/ NPTL -lpthread thread1.c

解决方案

如果您code没有外部依赖的pthread之外：

 的gcc -o thread1.c -D_REENTRANT线程1 -lpthread
 

<一个href=\"http://stackoverflow.com/questions/2601753/reentrant-flag-in-pthreads/2602822#2602822\">Quote:

  

定义_REENTRANT导致编译器使用线程安全的（即重入）的多种功能版本的C库。

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

clean:
    rm -f thread1 thread2 thread3

######################

all: thread1 thread2 thread3

CFLAGS=-D_REENTRANT
LDFLAGS=-lpthread

clean:
    rm -f thread1 thread2 thread3

Without using makefile, what is the correct command line to compile the thread1.c with gcc?

gcc -o thread1 CFLAGS=-I/usr/include/nptl -D_REENTRANT LDFLAGS=-L/usr/lib/nptl -lpthread thread1.c

解决方案

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.

这篇关于如何编译多线程code用gcc的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！