/in/foo.cc: In function 'int main()':
/in/foo.cc:10:21: warning: unused variable 'd' [-Wunused-variable]
   10 |                 int d,t;
      |                     ^
/in/foo.cc:10:23: warning: unused variable 't' [-Wunused-variable]
   10 |                 int d,t;
      |                       ^
/tmp/ccha3ThR.o: in function `main':
foo.cc:(.text.startup+0x7): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/ccha3ThR.o
/tmp/ccha3ThR.o: in function `_GLOBAL__sub_I_n':
foo.cc:(.text.startup+0x44): relocation truncated to fit: R_X86_64_PC32 against `.bss'
collect2: error: ld returned 1 exit status