on S/390 we have currently a plenty of testsuite failures due to inlining effects.
ld complains about testcases which try to link two files containing the same function in .gnu.linkonce sections but with different code sizes.
This is a linker bug, fix it, then come back. If you're confused, try porting GNU ld and using it, or take a look at bfd/elflink.c, under SEC_LINK_DUPLICATES_DISCARD v SEC_LINK_DUPLICATES_SAME_SIZE.
