main getcwd puts errno __ctors_start __ctors_end __dtors_start __dtors_end
. ERROR: getcwd() returned NULL
GCC: (GNU) 4.8.3 20140911 (Red Hat 4.8.3-7)
.shstrtab .gnu.hash .dynsym .dynstr .rel.dyn .rel.plt .text .rodata .dynamic .got .got.plt .comment