gcc 编译过程问题

写个hello.c 程序，

生成

hello.c -> 预处理 gcc -E hello.c -o hello.i     执行没问题；

预处理 -> 汇编 gcc -S hello.i -o hello.s   执行也没问题；

汇编 -> 目标文件 gcc -c hello.s -o hello.o  执行也没问题；

目标文件 -> 可执行文件  gcc hello.o -o hello 执行报了这个错误，如下：

hello.o: In function `_fini':

(.fini+0x0): multiple definition of `_fini'

/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/crti.o:(.fini+0x0): first defined here

hello.o: In function `data_start':

(.data+0x0): multiple definition of `__data_start'

/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/crt1.o:(.data+0x0): first defined here

hello.o:(.rodata+0x8): multiple definition of `__dso_handle'

/usr/lib/gcc/x86_64-redhat-linux/4.8.5/crtbegin.o:(.rodata+0x0): first defined here

hello.o:(.rodata+0x0): multiple definition of `_IO_stdin_used'

/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/crt1.o:(.rodata.cst4+0x0): first defined here

hello.o: In function `_start':

(.text+0x0): multiple definition of `_start'

/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/crt1.o:(.text+0x0): first defined here

hello.o: In function `_init':

(.init+0x0): multiple definition of `_init'

/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/crti.o:(.init+0x0): first defined here

/usr/lib/gcc/x86_64-redhat-linux/4.8.5/crtend.o:(.tm_clone_table+0x0): multiple definition of `__TMC_END__'

hello.o:(.data+0x8): first defined here

/bin/ld: error in hello.o(.eh_frame); no .eh_frame_hdr table will be created.

collect2: error: ld returned 1 exit status

？？？

但运行 hello.o 已经可以执行了。