万能makefile

 makefile文件的内容如下：

 

CURDIR = .
BASEDIR = /home/test/makefile_dir
SRC = $(CURDIR)/map_normalfile1.c/
      $(CURDIR)/map_normalfile2.c

 

INCDIR = -I$(BASEDIR)
LIBDIR = -L$(BASEDIR)

 

CFLAG = $(INCDIR) $(LIBDIR)

 

OBJ = $(SRC:.c=.o)
EXE = $(SRC:.c=.exe)
CC = cc

 

RM = rm -f

 

all:$(EXE)
$(EXE) :$(OBJ)
 @echo -- Linking [ $< ]
 -$(CC) $(CFLAG)  $< -o $@

 

%.o : %.c
 @echo -- Compiling [ $< ]
 -$(CC) $(CFLAG) -c  $< -o $@
clean:
 $(RM) $(EXE) *.o

 

makefile中提及到文件如下：

 

文件名： map_normalfile1.c
#include <sys/mman.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
typedef struct{
        char name[4];
        int  age;
}people;
main(int argc, char** argv) // map a normal file as shared mem:
{
        int fd,i;
        people *p_map;
        char temp;

        fd=open(argv[1],O_CREAT|O_RDWR|O_TRUNC,00777);
        lseek(fd,sizeof(people)*5-1,SEEK_SET);
        write(fd,"",1);

        p_map = (people*) mmap( NULL,sizeof(people)*10,PROT_READ|PROT_WRITE,MAP_SHARED,fd,0 );
        close( fd );
        temp = 'a';
        for(i=0; i<10; i++)
        {
                temp += 1;
                memcpy( ( *(p_map+i) ).name, &temp,2 );
                ( *(p_map+i) ).age = 20+i;
        }
        printf("initialize over/n");
        sleep(10);
        munmap( p_map, sizeof(people)*10 );
        printf( "umap ok /n" );
}

 

文件名：map_normalfile2.c
#include <sys/mman.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
typedef struct{
        char name[4];
        int  age;
}people;
main(int argc, char** argv)     // map a normal file as shared mem:
{
        int fd,i;
        people *p_map;
        fd=open( argv[1],O_CREAT|O_RDWR,00777 );
        p_map = (people*)mmap(NULL,sizeof(people)*10,PROT_READ|PROT_WRITE,MAP_SHARED,fd,0);
        for(i = 0;i<10;i++)
        {
        printf( "name: %s age %d;/n",(*(p_map+i)).name, (*(p_map+i)).age );
        }
        munmap( p_map,sizeof(people)*10 );
}