Question

我有C线程的这个问题：我把cpu.h包含到主文件中，为什么这个错误仍然存在？

的main.c

#include <stdio.h>                      
#include <sys/types.h>                      
#include <sys/stat.h>                       
#include <fcntl.h>                      
#include <unistd.h>                         
#include <string.h>                         
#include <stdlib.h>                         
#include <pthread.h>

#include "funzioni.h"
#include "ram.h" 
#include "cpu.h" 
#include "err.h"
......
......
rc = pthread_create (&threads[i] , NULL ,cpu, (void*)&parametri_thread_cpu[i] );

错误：'cpu'未声明（首次使用此功能）

我将cpu.h包含到main.c

中

cpu.h

#ifndef FUNZIONI_H
#define FUNZIONI_H
void *cpu(void *thread_arg);
#endif

我的Makefile

# Sources
SRCS= err.c funzioni.c cpu.c ram.c main.c
OBJS=$(SRCS:.c=.o)
EXECUTABLE=main.x

# Config
CC=gcc
CFLAGS= -c
LIBS= -lpthread
LD=gcc

# Target

all: clean $(EXECUTABLE)


clean:
@echo Cleaning old files
@rm -f *.o *.x

$(EXECUTABLE): $(OBJS)
@echo -------------Building $@
@ $(LD) -o $@ $^ $(LIBS)

err.o: err.c err.h
@echo -------------Building $@
@ $(CC) $(CFLAGS) -o $@ $<  

funzioni.o: funzioni.c funzioni.h 
@echo -------------Building $@
@ $(CC) $(CFLAGS) -o $@ $< $(LIBS)

cpu.o: cpu.c cpu.h funzioni.h err.h 
@echo -------------Building $@
@ $(CC) $(CFLAGS) -o $@ $< $(LIBS)

ram.o: ram.c ram.h funzioni.h err.h 
@echo -------------Building $@
@ $(CC) $(CFLAGS) -o $@ $< $(LIBS)

main.o: main.c ram.h cpu.h funzioni.h err.h  
@echo -------------Building $@
@ $(CC) $(CFLAGS) -o $@ $< $(LIBS)

.PHONY: all clean

这是我编译代码的makefile

Answer 1

您已从其他包含文件中复制了包含警戒，＆＃34; funzioni.h＆＃34;。

将其更改为CPU_H或类似内容。

Answer 2

我猜cpu.h #ifndef FUNZIONI_H中的include-guard已在其他地方定义。

thread_create：错误错误：'cpu'未声明（首次在此函数中使用）

2 个答案: