在编译时,我写了"gcc -g -Wall dene2 dene2.c",然后gcc发出一些痕迹

Question

编译代码时,我gcc -g -Wall dene2 dene2.c在控制台中编写代码.然后gcc在屏幕上发出一些文字.我不明白这个输出是什么意思(因为那个原因,我想不出一个有意义的标题,对不起).

我试过谷歌搜索但没有运气.

我不是要求详细检查下面的所有输出.只要告诉我"如何捕鱼".

dene2: In function `_start':
    /build/buildd/eglibc-2.10.1/csu/../sysdeps/i386/elf/start.S:65: multiple 
       definition of `_start'
   /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:/build/buildd/eglibc-2.10.1
      /csu/../sysdeps/i386/elf/start.S:65: first defined here
dene2:(.rodata+0x0): multiple definition of `_fp_hw'
   /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata+0x0): first 
     defined here
dene2: In function `_fini':
   (.fini+0x0): multiple definition of `_fini'
   /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.fini+0x0): first defined 
      here
dene2:(.rodata+0x4): multiple definition of `_IO_stdin_used'
   /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata.cst4+0x0): first 
     defined here
dene2: In function `__data_start':
 (.data+0x0): multiple definition of `__data_start'
   /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.data+0x0): first defined 
     here
dene2: In function `__data_start':
 (.data+0x4): multiple definition of `__dso_handle'
  /usr/lib/gcc/i486-linux-gnu/4.4.1/crtbegin.o:(.data+0x0): first defined here
dene2: In function `_init':
 (.init+0x0): multiple definition of `_init'
  /usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.init+0x0): first defined 
       here
  /tmp/ccMlGkkV.o: In function `main':
  /home/fatih/Desktop/dene2.c:5: multiple definition of `main'
dene2:(.text+0xb4): first defined here
  /usr/lib/gcc/i486-linux-gnu/4.4.1/crtend.o:(.dtors+0x0): multiple definition of 
     `__DTOR_END__'
dene2:(.dtors+0x4): first defined here
  collect2: ld returned 1 exit status

Answer 1

我想你可能想要一个-o命令行:

gcc -g -Wall -o dene2 dene2.c

没有-o的那里你有什么试图链接dene2编译的结果dene2.c. dene2从以前的构建尝试中可能遗留在您的目录中.这就是为什么你会看到所有重复的符号错误.