GCC编译器参数书写问题

来源：互联网发布：韩莹莹数据编辑：程序博客网时间：2024/06/06 13:11

$ gcc -o -g firstdrvtest firstdrvtest.c

报错：

firstdrvtest: In function `_fini':(.fini+0x0): multiple definition of `_fini'/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crti.o:(.fini+0x0): first defined herefirstdrvtest: In function `data_start':(.data+0x0): multiple definition of `__data_start'/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o:(.data+0x0): first defined herefirstdrvtest: In function `data_start':(.data+0x8): multiple definition of `__dso_handle'/usr/lib/gcc/x86_64-linux-gnu/5/crtbegin.o:(.data+0x0): first defined herefirstdrvtest:(.rodata+0x0): multiple definition of `_IO_stdin_used'/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o:(.rodata.cst4+0x0): first defined herefirstdrvtest: In function `_start':(.text+0x0): multiple definition of `_start'/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o:(.text+0x0): first defined herefirstdrvtest: In function `_init':(.init+0x0): multiple definition of `_init'/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crti.o:(.init+0x0): first defined here/tmp/ccztJcA4.o: In function `main':firstdrvtest.c:(.text+0x0): multiple definition of `main'firstdrvtest:(.text+0xf6): first defined here/usr/lib/gcc/x86_64-linux-gnu/5/crtend.o:(.tm_clone_table+0x0): multiple definition of `__TMC_END__'firstdrvtest:(.data+0x10): first defined here/usr/bin/ld: error in firstdrvtest(.eh_frame); no .eh_frame_hdr table will be created.collect2: error: ld returned 1 exit status

在网上搜索后才知道，这是因为-g是选项，后面不需要给参数，而-o是参数，后面需要加上输出文件名称，所以，gcc -o -g firstdrvtest firstdrvtest.c，会生成一个-g的输出文件，而后面的firstdrvtest就成非法参数了。
正确的写法是gcc -g -o firstdrvtest firstdrvtest.c，让-g在-o之后，编译器就不会报告这样的错误了。

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