Are all the library functions linked by default

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I knew that header files contain declarations of functions and variables which help during compilation time whether the entered parameters are valid or not.

Are all the library functions linked by default?

//#include<stdio.h>
//#include<math.h>

int main()
{
    printf("Hello\n");

    double d;
    d=sqrt(64);
    printf("%lf",d);    

    return 0;
}

Compiles and produces few warnings as expected

Output

Hello
8.000000

It works!
Are all the library functions linked by default?

linker
1 Answers

Most linkers from C toolchain link stdlib by default unless you disable this behaviour with a flag for example -nodefaultlibs or -nostdlibs in gcc.

Are all the library functions linked by default?

Not all, but standard library functions are usually linked by default by linkers.

user_26593130
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