/tmp/ccOHJqtZ.o: In function `main':
foo.cc:(.text.startup+0x18): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/ccOHJqtZ.o
foo.cc:(.text.startup+0x2a): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/ccOHJqtZ.o
foo.cc:(.text.startup+0x39): relocation truncated to fit: R_X86_64_PC32 against symbol `a0' defined in .bss section in /tmp/ccOHJqtZ.o
foo.cc:(.text.startup+0x9a): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/ccOHJqtZ.o
foo.cc:(.text.startup+0xbf): relocation truncated to fit: R_X86_64_PC32 against symbol `a0' defined in .bss section in /tmp/ccOHJqtZ.o
foo.cc:(.text.startup+0x375): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/ccOHJqtZ.o
/tmp/ccOHJqtZ.o: In function `_GLOBAL__sub_I_n':
foo.cc:(.text.startup+0x523): relocation truncated to fit: R_X86_64_PC32 against `.bss'
foo.cc:(.text.startup+0x541): relocation truncated to fit: R_X86_64_PC32 against `.bss'
collect2: error: ld returned 1 exit status