// riscv64-unknown-elf-gcc demo1.c -o demo -O3 --save-temps
// riscv64-unknown-elf-objdump -d -t -r demo-demo1.o
// demo.i: The preprocessed source, which expands any preprocessor
// directives (things like #include or #ifdef).
// demo.s : The output of the actual compiler,
 //   which is an assembly file(a text file in the RISC - V assembly format)
 //       .demo.o : The output of the assembler,
 //   which is an un - linked object file(an ELF file, but not an executable ELF)
 //                        .demo : The output of the linker,
 //   which is a linked executable(an executable ELF file).long global_symbol[2];
long global_symbol[2];
#define IDX 1

int main() { return global_symbol[IDX] != 0; }

// Failed to compile because of global_symbol address
// riscv64-unknown-elf-gcc demo.c -o demo -O3 -nostartfiles -nostdlib --save-temps  -Wl,-Ttext-segment,0x80000000