I'm encountering a 'multiple definition' error while trying to compile a project that includes "mksquashfs". The error I'm getting are like this:
/usr/bin/ld: read_fs.o:(.bss+0x0): multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here/usr/bin/ld: read_fs.o:(.bss+0x8): multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined here/usr/bin/ld: action.o:(.bss+0x0): multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here/usr/bin/ld: action.o:(.bss+0x8): multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined here/usr/bin/ld: sort.o:(.bss+0x100000): multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here/usr/bin/ld: sort.o:(.bss+0x100008): multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined here/usr/bin/ld: info.o:(.bss+0x10): multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined here/usr/bin/ld: info.o:(.bss+0x8): multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here/usr/bin/ld: restore.o:(.bss+0x0): multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here/usr/bin/ld: restore.o:(.bss+0x8): multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined here/usr/bin/ld: process_fragments.o:(.bss+0x0): multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here/usr/bin/ld: process_fragments.o:(.bss+0x8): multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined here/usr/bin/ld: xattr.o:(.bss+0x8): multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here/usr/bin/ld: xattr.o:(.bss+0x10): multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined herecollect2: error: ld returned 1 exit statusmake[3]: *** [Makefile:284: mksquashfs] Error 1make[3]: *** Waiting for unfinished jobs....It seems like multiple object files are defining the same variable, specifically "fwriter_buffer" and "bwriter_buffer". The error suggest that these variables are defined in "mksquashfs.o" and other object files like "read_fs.o", "action.o", etc.
How can I resolve this "multiple definition" linker error?Is there a best practice to avoid such conflict ?
Additional Information:
- I'm compiling this on a Linux system using "riscv64-unknown-linux-gnu-gcc (version: 13.2.0)"
- The project uses "make" for the build process