Linking error on mips64el...

Dear MIPS experts,

ocaml 4.08.8-7 currently FTBFS on mips64el. The previous version,
4.08.8-6 did build fine and the only difference is metadata.

I investigated on porterbox eller.debian.org, and realized the following
doesn't work in a mips64el sid chroot:

$ cat add.c
int add(int a, int b) {
        return a + b;
}
$ cat sub.c
int sub(int a, int b) {
        return a - b;
}
$ gcc -c add.c
$ gcc -c sub.c
$ ld -r -o toto.o add.o sub.o
ld: add.o: ABI is incompatible with that of the selected emulation
ld: failed to merge target specific data of file add.o
ld: sub.o: ABI is incompatible with that of the selected emulation
ld: failed to merge target specific data of file sub.o
ld: attempt to do relocatable link with elf64-tradlittlemips input and
elf32-ntradlittlemips output
ld: add.o: file class ELFCLASS64 incompatible with ELFCLASS32
ld: final link failed: file in wrong format

...whereas it works on amd64.

Does anyone have an idea on what is going on?


Cheers,