| Summary: | dev-lang/ldc2-1.35.0-r1::dlang fails to build (lto): gen/asm-x86.h:3869:64: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing] | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | Rafael Kitover <rkitover> |
| Component: | Overlays | Assignee: | Marco Leise <Marco.Leise> |
| Status: | UNCONFIRMED --- | ||
| Severity: | normal | CC: | a.horodniceanu, rkitover |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
| Attachments: |
build log
emerge --info |
||
|
Description
Rafael Kitover
2024-01-21 05:09:53 UTC
Created attachment 882714 [details]
build log
Created attachment 882715 [details]
emerge --info
> emerge -pqv =dev-lang/ldc2-1.35.0-r1
[ebuild N ] dev-lang/ldc2-1.35.0-r1 USE="-dmd-2_101 -dmd-2_102 -dmd-2_103 -dmd-2_104 -dmd-2_105 dmd-2_106 -gdc-12 -gdc-13 -ldc2-1_32 -ldc2-1_33 -ldc2-1_34 -ldc2-1_35 -ldc2-1_36 static-libs" ABI_X86="-32 (64) (-x32)"
Without LTO flags, for a successful emerge you get:
````
QA: other
QA Notice: Package triggers severe warnings which indicate that it
may exhibit random runtime failures.
/var/tmp/portage/dev-lang/ldc2-1.36.0/work/ldc-1.36.0-src/gen/abi/x86-64.cpp:191:45: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
/var/tmp/portage/dev-lang/ldc2-1.36.0/work/ldc-1.36.0-src/gen/asm-x86.h:3869:64: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
/var/tmp/portage/dev-lang/ldc2-1.36.0/work/ldc-1.36.0-src/gen/asm-x86.h:3872:64: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
/var/tmp/portage/dev-lang/ldc2-1.36.0/work/ldc-1.36.0-src/gen/asm-x86.h:3869:64: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
/var/tmp/portage/dev-lang/ldc2-1.36.0/work/ldc-1.36.0-src/gen/asm-x86.h:3872:64: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
Please do not file a Gentoo bug and instead report the above QA
issues directly to the upstream developers of this software.
Homepage: https://github.com/ldc-developers/ldc
```
This has been a problem for a while but I haven't investigated it as I didn't want to look into the LTO capabilities of dev-lang/ldc2.
If you do want LTO enabled you should probably enabled it in LDCFLAGS as well so do LDCFLAGS="-O4 -release -flto=thin" but I didn't test it at all and I don't know what will break or if it will work.
You should report this upstream at https://github.com/ldc-developers/ldc. If you can't or aren't interested I've made an issue in the dlang overlay https://github.com/gentoo/dlang/issues/129 which I will eventually look into. I'm caught up with exams at the moment so I won't be of much help for a few weeks.
(In reply to Horodniceanu Andrei from comment #4) > > This has been a problem for a while but I haven't investigated it as I > didn't want to look into the LTO capabilities of dev-lang/ldc2. > Need to pass -fno-strict-aliasing anyway then (and report upstream ofc). It's still a problem either way. The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/user/dlang.git/commit/?id=585480e834a5740f4d3086b867b7232cb1c1bf63 commit 585480e834a5740f4d3086b867b7232cb1c1bf63 Author: Horodniceanu Andrei <a.horodniceanu@proton.me> AuthorDate: 2024-01-24 18:37:44 +0000 Commit: Horodniceanu Andrei <a.horodniceanu@proton.me> CommitDate: 2024-01-24 18:38:50 +0000 dev-lang/ldc2: backport strict-aliasing fixes Bug: https://bugs.gentoo.org/922590 Signed-off-by: Horodniceanu Andrei <a.horodniceanu@proton.me> dev-lang/ldc2/ldc2-1.32.2-r1.ebuild | 79 +++++++++++++++++++++ dev-lang/ldc2/ldc2-1.33.0-r1.ebuild | 79 +++++++++++++++++++++ dev-lang/ldc2/ldc2-1.34.0-r1.ebuild | 80 ++++++++++++++++++++++ ...ldc2-1.35.0-r1.ebuild => ldc2-1.35.0-r2.ebuild} | 4 +- 4 files changed, 241 insertions(+), 1 deletion(-) https://gitweb.gentoo.org/repo/user/dlang.git/commit/?id=ce1aa5d8fdb60dcd1c08cc1d35cf77fc2998959b commit ce1aa5d8fdb60dcd1c08cc1d35cf77fc2998959b Author: Horodniceanu Andrei <a.horodniceanu@proton.me> AuthorDate: 2024-01-24 18:21:55 +0000 Commit: Horodniceanu Andrei <a.horodniceanu@proton.me> CommitDate: 2024-01-24 18:38:46 +0000 dev-lang/ldc2: pass -fno-strict-aliasing Bug: https://bugs.gentoo.org/show_bug.cgi?id=922590 Signed-off-by: Horodniceanu Andrei <a.horodniceanu@proton.me> dev-lang/ldc2/{ldc2-1.36.0.ebuild => ldc2-1.36.0-r1.ebuild} | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) Fixed upstream in https://github.com/ldc-developers/ldc/commit/b1f976888e5ad3ca45c83aa99e9d8c06a2f72589 Sam, are these the proper changes? |
