When I generate the hex files to different directory ./output, ./output2. And I compare them. There are some differences close to the end of the file. the following shows only the differences, the left most number is the line number.
49 :208DE000000000000000000000000000000000000000000003000000000000000000000070
55 :208EA000000000000000000000000000005531E800ED00F8004B31CE4F802FAE463C00A047
56 :208EC000003200A000AC33AE16682F6C0000000100095D410000000000000B8EFFFFFFFFDD
49 ::208DE00000000000000000000000000000000000000000000500000000000000000000006E
55 ::208EA000000000000000000000000000005531E800ED00F8004B31CE4F882FAE463C00A837
56 ::208EC000003200A800AC33AE16682F6C00000001000C76A40000000000000C27FFFFFFFFBC