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#include <stdint.h>

// The following two kinds of variables require static storage,
// i.e. `data` or `bss` section in the final executable.
//
// 1. global        variables
// 2. local  static variables
//
// The particular section depends on its initial value:
// initialized with non-zero value -- data segment
// uninitialized                   -- bss segment

// .data
// static int64_t x = 1;
// int64_t x = 1;

// .bss
// static int64_t x;
// int64_t x;

void f() {
    // .data
    // static int64_t x = 1;
    // .bss
    static int64_t x;

    // needed in the case of global-static
    (void)x;
}

int main(int argc, char *argv[])
{
    return 0;
}

// One can study the placement use `size`, something like:
//
// $ clang tmp.c && size a.out
//
// ## Case 0 ## (baseline)
//
// text    data     bss     dec     hex filename
// 1334     544       8    1886     75e a.out
//
// ## Case 1 ##
// global & initialized with non-zero -- data segment increase by 8
//
// text    data     bss     dec     hex filename
// 1334     552       8    1894     766 a.out
//
// ## Case 2 ##
// global & uninitialized             -- bss segment increase by 8
//
// text    data     bss     dec     hex filename
// 1334     544      16    1894     766 a.out
//
// ## Case 3 ##
// local & initialized with non-zero  -- data segment increase by 8
//
// text    data     bss     dec     hex filename
// 1334     552       8    1894     766 a.out
//
// ## Case 4 ##
// local & uninitialized             -- bss segment increase by 8
//
// text    data     bss     dec     hex filename
// 1334     544      16    1894     766 a.out