/tmp/cchmPaKH.o: In function `dfs(int, int)':
foo.cc:(.text+0xdf): relocation truncated to fit: R_X86_64_PC32 against symbol `m' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text+0xe8): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cchmPaKH.o
/tmp/cchmPaKH.o: In function `main':
foo.cc:(.text.startup+0x18): relocation truncated to fit: R_X86_64_PC32 against symbol `m' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0x2a): relocation truncated to fit: R_X86_64_PC32 against symbol `m' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0x32): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0x7c): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0x84): relocation truncated to fit: R_X86_64_PC32 against symbol `m' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0x9a): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0xae): relocation truncated to fit: R_X86_64_PC32 against symbol `m' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0xb6): relocation truncated to fit: R_X86_64_PC32 against symbol `ans' defined in .bss section in /tmp/cchmPaKH.o
foo.cc:(.text.startup+0xea): additional relocation overflows omitted from the output
collect2: error: ld returned 1 exit status