我正在练习信号,并且我已经从gcc移到eclipse上,并且遇到了一些问题。 “:分配给从类型键入‘联盟’‘无效(*)(INT)’时不兼容类型的错误”为eclipse配置C99 for posix
寻找网上我看到,因为编译器错误的几率低于GCC代码编译罚款月食我得到错误 使用pre C99版本。于是,我就使Eclipse编译C99版,我发现下面的链接How do you configure GCC in Eclipse to use C99?
我试图做出改变,如SO链接建议,但目前我的其他标志具有线,说 “-c -fmessage长度= 0 “
如果我添加-std = C99作为之前或之后行编译器无法找到文件本身
我假设我使用预C99版得到,因为编译器的错误邮寄建议。请纠正我,如果我以错误的方向,如果它的正确我追什么会是-std = C99添加到标志选项,以使Eclipse中使用C99的正确方法
编辑:基于答案时,我改变了sig_handler参数我能够在不添加-std = c99标志的情况下进行编译,但是按照建议,我会遇到编译错误。下面是编译行
GCC -O0 -g3 -Wall -c -fmessage长度= 0 -std = C99 -MMD -MP -MF“
`odd_process.d" -MT"odd_process.d" -o "odd_process.o" "../odd_process.c`"
../odd_process.c: In function ‘main’:
../odd_process.c:13:2: error: unknown type name ‘sigset_t’
../odd_process.c:14:19: error: storage size of ‘sa’ isn’t know
Ñ
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
void sighandler(int sig)
{
printf("signal has been caught \n ");
}
int main(void)
{
sigset_t block_signal, empty_signal;
struct sigaction sa;
pid_t childid;
int i;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
**/*for below line while running on eclipse I see error which says*/
/***error: incompatible types when assigning to type ‘union <anonymous>’ from type ‘void (*)(int)’** */**
**sa.__sigaction_handler = sighandler;**
stdbuf(stdout, NULL);
if (sigaction(SIGCHLD, &sa, NULL) == -1)
{
printf("value not passed to signal handler \n ");
}
sigemptyset(&block_signal);
sigaddset(&block_signal, SIGCHLD);
if (sigprocmask(SIG_SETMASK, &block_signal, NULL) == -1)
{
printf("error occurred while setting signal mask \n");
}
childid = fork();
printf("value of child id is -- %d ", childid);
switch(childid)
{
case -1:
printf("Error condition child creation did not happen properly \n");
exit(-1);
case 0:
printf(" Child got created and will print odd number !!! ");
sleep(5);
exit(1);
default:
printf(" parent gets created !!! \n ");
break;
}
sigemptyset(&empty_signal);
sigsuspend(&empty_signal);
printf(" parent will print \n ");
for(i = 0; i < 10; i++)
{
printf("%d ", i);
}
printf("\n");
return EXIT_SUCCESS;
}
张贴代码丢失的#include''关于 –
user3629249
这行做:'stdbuf(标准输出,NULL );'我怀疑你真的想用'setbuf()' – user3629249
这一行:'sa.sigaction_handler = sighandler;'应该写成:'sa.sa_handler = sighandler; – user3629249