Output from gcc -m32 -o [Program] [Program].c && file Program:
Program: ELF 32-bit LSB pie executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, BuildID[sha1]=4dbc54aee00e05742077f05b5be11583c55197a3, for GNU/Linux 3.2.0, not stripped
Output from gcc -mx32 -o [Program] [Program].c && file Program:
Program: ELF 32-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /libx32/ld-linux-x32.so.2, BuildID[sha1]=f76b7461fbd56cb195d4e4fc345a33b554514043, for GNU/Linux 3.4.0, not stripped
Output from gcc -m64 -o [Program] [Program].c && file Program:
Program: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=45af653e8c033eb21897c8b8881f872d2e3619aa, for GNU/Linux 3.2.0, not stripped
Output from arm-linux-gnueabi-gcc -o Program Program.c && file Program
Program: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.3, BuildID[sha1]=e941cc3be7bc679f75c1d847fa1fe7e0dc8b69cf, for GNU/Linux 3.2.0, not stripped
Output from aarch64-linux-gnu-gcc -o Program Program.c && file Program
Program: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, BuildID[sha1]=345f5923138092249a65761b1cd07123ca9b0758, for GNU/Linux 3.7.0, not stripped
Obviously, the hashes will vary significantly depending on the specific program to be run; these hashes are for the program that simply prints "Success!" and exits zero if successful.