Comment # 8 on bug 1191473 from Martin Li������ka

I don't see any architecture difference:

x86_64:

$ echo 'int main() {}' | gcc -Wl,-rpath,:::::::::: -x c - && readelf -d a.out |
grep RUNPATH
 0x000000000000001d (RUNPATH)            Library runpath: [::::::::::]
$ file a.out
a.out: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically
linked, interpreter /lib64/ld-linux-x86-64.so.2,
BuildID[sha1]=82eeb6341bfc136f30e4e1fc175b796db4a70308, for GNU/Linux 3.2.0,
with debug_info, not stripped

i586:

$ echo 'int main() {}' | gcc -Wl,-rpath,:::::::::: -x c - && readelf -d a.out |
grep RUN
 0x0000001d (RUNPATH)                    Library runpath: [::::::::::]
$ file a.out
a.out: ELF 32-bit LSB pie executable, Intel 80386, version 1 (SYSV),
dynamically linked, interpreter /lib/ld-linux.so.2,
BuildID[sha1]=1e80fad8c9d80b8606d9f79b3063a8385a23f81c, for GNU/Linux 3.2.0,
with debug_info, not stripped