https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221107

--- Comment #8 from Mark Millard <mar...@dsl-only.net> ---
clang 5 and gcc 4.2.1 do not match for what
goes in aha*.o and agp*.o files for the
problem symbols:

gcc 4.2.1 ( R_PPC_ADDR16_HA / R_PPC_ADDR16_LO ):

# readelf -at
/usr/obj/powerpcvtsc_gcc421/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha/aha*.o
| grep aha_alloc
    50: 0000000000000514   112 FUNC    GLOBAL DEFAULT    1 aha_alloc
00000032 00003206 R_PPC_ADDR16_HA     00000000 aha_alloc + 0
0000003e 00003204 R_PPC_ADDR16_LO     00000000 aha_alloc + 0
0000052a 00003206 R_PPC_ADDR16_HA     00000000 aha_alloc + 0
0000052e 00003204 R_PPC_ADDR16_LO     00000000 aha_alloc + 0
    50: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND aha_alloc

# readelf -at
/usr/obj/powerpcvtsc_gcc421/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/agp/agp*.o
| grep caps
0000204a 00003a06 R_PPC_ADDR16_HA     00000434 agp_find_caps + 0
0000204e 00003a04 R_PPC_ADDR16_LO     00000434 agp_find_caps + 0
00002312 00003a06 R_PPC_ADDR16_HA     00000434 agp_find_caps + 0
0000231a 00003a04 R_PPC_ADDR16_LO     00000434 agp_find_caps + 0
00000000 00003a01 R_PPC_ADDR32        00000434 agp_find_caps + 0
    58: 0000000000000434   192 FUNC    GLOBAL DEFAULT    1 agp_find_caps
000002be 00003906 R_PPC_ADDR16_HA     00000000 agp_find_caps + 0
000002c6 00003904 R_PPC_ADDR16_LO     00000000 agp_find_caps + 0
    57: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND agp_find_caps


clang 5 ( R_PPC_PLTREL24 ):

# readelf -at
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha/aha*.o
| grep aha_alloc
    44: 0000000000000000    96 FUNC    GLOBAL DEFAULT    2 aha_alloc
000000f0 00002e12 R_PPC_PLTREL24      00000000 aha_alloc + 0
0000070c 00002e12 R_PPC_PLTREL24      00000000 aha_alloc + 0
    46: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND aha_alloc

# readelf -at
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/agp/agp*.o
| grep caps
    58: 0000000000000000   172 FUNC    GLOBAL DEFAULT    2 agp_find_caps
00000138 00003512 R_PPC_PLTREL24      00000000 agp_find_caps + 0
    53: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND agp_find_caps

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