Created attachment 875032 [details] build log In a stricter lto (-flto -Werror=odr -Werror=strict-aliasing -Werror=lto-type-mismatch) environment, sys-devel/llvm-17.0.5 will fail to compile with the following errors: ``` /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp:73:8: error: type ‘struct ARMInstrTable’ violates the C++ One Definition Rule [-Werror=odr] 73 | struct ARMInstrTable { | ^ /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/ARM/ARMGenInstrInfo.inc:5751: note: a different type is defined in another translation unit 5751 | struct ARMInstrTable { | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp:74:15: note: the first difference of corresponding definitions is field ‘Insts’ 74 | MCInstrDesc Insts[4445]; | ^ /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/ARM/ARMGenInstrInfo.inc:5752: note: a field of same name but different type is defined in another translation unit 5752 | MCInstrDesc Insts[4450]; | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp:73:8: note: array types have different bounds 73 | struct ARMInstrTable { | ^ /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp:78:28: error: ‘ARMDescs’ violates the C++ One Definition Rule [-Werror=odr] 78 | extern const ARMInstrTable ARMDescs; | ^ /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/ARM/ARMGenInstrInfo.inc:5769: note: type ‘const struct ARMInstrTable’ itself violates the C++ One Definition Rule 5769 | extern const ARMInstrTable ARMDescs = { | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/ARM/ARMGenInstrInfo.inc:5769: note: ‘ARMDescs’ was previously declared here /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/SystemZ/SystemZGenAsmMatcher.inc:56: error: type ‘SubtargetFeatureBits’ violates the C++ One Definition Rule [-Werror=odr] 56 | enum SubtargetFeatureBits : uint8_t { | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/LoongArch/LoongArchGenAsmMatcher.inc:94: note: an enum with different value name is defined in another translation unit 94 | enum SubtargetFeatureBits : uint8_t { | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/SystemZ/SystemZGenAsmMatcher.inc:57: note: name ‘Feature_FeatureSoftFloatBit’ differs from name ‘Feature_IsLA64Bit’ defined in another translation unit 57 | Feature_FeatureSoftFloatBit = 33, | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm_build-abi_x86_64.amd64/lib/Target/LoongArch/LoongArchGenAsmMatcher.inc:95: note: mismatching definition 95 | Feature_IsLA64Bit = 4, | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm/include/llvm/CodeGen/MachineScheduler.h:1066: error: virtual table of type ‘struct GenericSchedulerBase’ violates one definition rule [-Werror=odr] 1066 | class GenericSchedulerBase : public MachineSchedStrategy { | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm/include/llvm/CodeGen/MachineScheduler.h:1066: note: the conflicting type defined in another translation unit 1066 | class GenericSchedulerBase : public MachineSchedStrategy { | /var/tmp/portage/sys-devel/llvm-17.0.5/work/llvm/include/llvm/CodeGen/MachineScheduler.h:257:16: note: virtual method ‘scheduleTree’ 257 | virtual void scheduleTree(unsigned SubtreeID) {} | ^ <built-in>: note: ought to match virtual method ‘__cxa_pure_virtual’ but does not lto1: some warnings being treated as errors lto-wrapper: fatal error: /usr/bin/x86_64-pc-linux-gnu-g++ returned 1 exit status compilation terminated. /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: error: lto-wrapper failed collect2: error: ld returned 1 exit status ``` Attaching logs.
Created attachment 875033 [details] emerge --info
*** Bug 922188 has been marked as a duplicate of this bug. ***
Also affecting 17.0.6, see https://bugs.gentoo.org/922188 .
I am not trying to push this, but I was wondering if anyone is looking at it. Thanks
I reported it upstream in bug 926529 where there's a bunch of diff. ones.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=3b08335ec801c4736369fa57bce00c1c8669682d commit 3b08335ec801c4736369fa57bce00c1c8669682d Author: Sam James <sam@gentoo.org> AuthorDate: 2024-03-12 07:57:41 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2024-03-12 08:00:18 +0000 sys-devel/llvm: filter LTO for GCC again These failures aren't GCC specific but only GCC has these warnings implemented and it's less likely that LLVM will miscompile itself because people will test it more, even if the issue is UB in LLVM. Filter to avoid people hitting roadblocks on a common package when using safe LTO flags (-Werror=...). Closes: https://bugs.gentoo.org/917536 Closes: https://bugs.gentoo.org/926529 Signed-off-by: Sam James <sam@gentoo.org> sys-devel/llvm/llvm-17.0.6.ebuild | 7 ++++++- sys-devel/llvm/llvm-18.1.0.ebuild | 7 ++++++- sys-devel/llvm/llvm-19.0.0.9999.ebuild | 7 ++++++- sys-devel/llvm/llvm-19.0.0_pre20240302.ebuild | 7 ++++++- sys-devel/llvm/llvm-19.0.0_pre20240309.ebuild | 7 ++++++- 5 files changed, 30 insertions(+), 5 deletions(-)
