foo.c: In function 'main':
foo.c:21:5: warning: implicit declaration of function 'mis' [-Wimplicit-function-declaration]
   21 |     mis(s, k);
      |     ^~~
/nix/store/3r87a2wq1w4l66wnsm7rqvy608mx23h6-binutils-2.40/bin/ld: /tmp/ccq9h2N1.o: in function `main':
foo.c:(.text.startup+0x35): undefined reference to `mis'
collect2: error: ld returned 1 exit status

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