https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81863
--- Comment #7 from Arnd Bergmann <arnd at linaro dot org> --- Created attachment 42009 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42009&action=edit preprocessed net/rds/recv.i (In reply to ard.biesheuvel from comment #6) > FWIW, the following makes the issue go away (tested on 4.9.4) > > @@ -6196,7 +6210,9 @@ > [(set (match_operand:SI 0 "nonimmediate_operand" "=r") > (lo_sum:SI (match_operand:SI 1 "nonimmediate_operand" "0") > (match_operand:SI 2 "general_operand" "i")))] > - "arm_arch_thumb2 && arm_valid_symbolic_address_p (operands[2])" > + "arm_arch_thumb2 && arm_valid_symbolic_address_p (operands[2]) > + && ( GET_CODE (operands[2]) != SYMBOL_REF > + || !target_word_relocations)" > "movt%?\t%0, #:upper16:%c2" > [(set_attr "predicable" "yes") > (set_attr "predicable_short_it" "no") > > I have no idea whether this is a suitable fix: I will leave that to the > experts. Just providing this as a data point. I tried this change and it apparently addressed one such problem on gcc-7.1.1 (in multiple kernel configurations): /home/arnd/cross-gcc/bin/arm-linux-gnueabi-ld: drivers/mfd/janz-cmodio.o: relocation R_ARM_THM_MOVW_ABS_NC against `a local symbol' can not be used when making a shared object; recompile with -fPIC but not another one: /home/arnd/cross-gcc/bin/arm-linux-gnueabi-ld: net/rds/recv.o: relocation R_ARM_MOVW_ABS_NC against `rds_stats' can not be used when making a shared object; recompile with -fPIC The first only showed up in configurations using -mthumb, while the second only appeared only once so far, in a configuration using -marm. Attaching the preprocessed source file, build with "arm-linux-gnueabi-gcc-7.1.1 -mword-relocations -march=armv7-a -O1 -c recv.i"
