I'm following this link to extract; make some changes & then repack
system.img which is present in nexus 5 image. (Version Tag android-5.1.1_r9)
The guide works for 4.1.1, but not for 5.1.1_r9.
Because, there is no sparse_crc32.c & simg2img.c present in ext4_utils folder.
So how can I extract & repack the img file.
P.S. - I dont know much about gcc.