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Description of problem: One of my development machines has Fedora 21 Rawhide and building OpenEmbedded/Yocto on it failed at binutils 2.24. The problem is not with OE/Yocto, it's a bug in a macro in binutils uncovered by the recent introduction of GCC 4.9 into Rawhide. The new GCC has enabled -Wunused-value for -Wall and together with -Werror, it's turned into a compilation error. The last lines of the compiler output (from rpmbuild --rebuild binutils-2.24-11.fc21.src.rpm) is: subsegs.c: In function 'subseg_change': subsegs.c:70:37: error: right-hand operand of comma expression has no effect [-Werror=unused-value] bfd_set_section_userdata (stdoutput, seg, seginfo); ^ subsegs.c: In function 'subseg_get': subsegs.c:172:40: error: right-hand operand of comma expression has no effect [-Werror=unused-value] bfd_set_section_userdata (stdoutput, secptr, seginfo); ^ cc1: all warnings being treated as errors make[4]: *** [subsegs.o] Error 1 make[4]: *** Waiting for unfinished jobs.... write.c: In function 'record_alignment': write.c:366:40: error: right-hand operand of comma expression has no effect [-Werror=unused-value] bfd_set_section_alignment (stdoutput, seg, align); ^ cc1: all warnings being treated as errors make[4]: *** [write.o] Error 1 config/obj-elf.c: In function 'obj_elf_init_stab_section': config/obj-elf.c:1940:34: error: right-hand operand of comma expression has no effect [-Werror=unused-value] bfd_set_section_alignment (stdoutput, seg, 2); ^ cc1: all warnings being treated as errors Version-Release number of selected component (if applicable): $ rpm -q gcc gcc-4.9.0-0.10.fc21.x86_64 The version of binutils is at http://koji.fedoraproject.org/koji/buildinfo?buildID=507201 How reproducible: Obviously always. Steps to Reproduce: 1. Install Fedora 21 Rawhide with GCC 4.9 2. Try to rebuild binutils from the koji link. 3. Actual results: Compiler error. Expected results: Package should be built properly. Additional info:
Created attachment 886079 [details] Fix compilation error with GCC 4.9.0 This patch fixes the compilation error.
Although the patch fixes building binutils, GCC 4.9.0 causes regressions in the binutils checks. Here are the dejagnu headers and summaries as seen in the terminal. Test Run By zozo on Mon Apr 14 11:49:06 2014 Native configuration is x86_64-redhat-linux-gnu === binutils tests === Schedule of variations: unix Running target unix ... === binutils Summary === # of expected passes 19 # of unexpected failures 70 # of unresolved testcases 2 # of untested testcases 6 # of unsupported tests 1 ------------------------------------ Test Run By zozo on Mon Apr 14 11:49:14 2014 Native configuration is x86_64-redhat-linux-gnu === gas tests === Schedule of variations: unix Running target unix ... === gas Summary === # of expected passes 185 # of unexpected failures 576 ------------------------------------ Test Run By zozo on Mon Apr 14 11:51:36 2014 Native configuration is x86_64-redhat-linux-gnu === ld tests === Schedule of variations: unix Running target unix ... === ld Summary === # of expected passes 25 # of unexpected failures 738 # of expected failures 43 # of unresolved testcases 59 # of untested testcases 1 ------------------------------------ Test Run By zozo on Mon Apr 14 11:49:14 2014 Native configuration is x86_64-redhat-linux-gnu === gas tests === Schedule of variations: unix Running target unix ... === gas Summary === # of expected passes 185 # of unexpected failures 576 ../as-new 2.24 Test Run By zozo on Mon Apr 14 11:51:36 2014 Native configuration is x86_64-redhat-linux-gnu === ld tests === Schedule of variations: unix Running target unix ... === ld Summary === # of expected passes 25 # of unexpected failures 738 # of expected failures 43 # of unresolved testcases 59 # of untested testcases 1 /home/zozo/rpmbuild/BUILD/binutils-2.24/ld/ld-new -znorelro 2.24 Test Run By zozo on Mon Apr 14 11:49:06 2014 Native configuration is x86_64-redhat-linux-gnu === binutils tests === Schedule of variations: unix Running target unix ... === binutils Summary === # of expected passes 19 # of unexpected failures 70 # of unresolved testcases 2 # of untested testcases 6 # of unsupported tests 1
Hi Zoltan, Thanks for the bug report. I have imported that fix from the FSF mainline sources which uses inline functions rather than macros. This is now in the binutils-2.24-12.fc21 release. As for the 4.9 induced regressions, I will have to spend some more time investigating them. Cheers Nick
This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle. Changing version to '22'. More information and reason for this action is here: https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora22
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.