foo.c: In function 'main':
foo.c:7:9: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
7 | scanf_s("%d",&x1);
| ^~~~~~~
| scanf
/nix/store/j2gmfdd29cp3rcvghmn1a5kgcnmf8myp-binutils-2.40/bin/ld: /tmp/ccdO2vXX.o: in function `main':
foo.c:(.text.startup+0x13): undefined reference to `scanf_s'
/nix/store/j2gmfdd29cp3rcvghmn1a5kgcnmf8myp-binutils-2.40/bin/ld: foo.c:(.text.startup+0x24): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status
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