How to make compiler generate a “elf32-x86-64” format object file?

Question

First, some background info about elf32-x86-64 format.

It is a format that leverages 64-bit hardware while enforcing 32-bit pointers. Ref1 and Ref2.

Quest

Answer 1

GCC will adjust the linker command line accordingly if you invoke it as gcc -mx32. It is more than just a compiler flag.