Bug 881339 – dev-python/libsass-0.22.0 - error: invalid argument -std=gnu++<snip> not allowed with C

• Product: Gentoo Linux
• Status: CONFIRMED ---

[Description Toralf Förster 2022-11-14 22:24:58 UTC]

running build_ext
building '_sass' extension
creating build/temp.linux-x86_64-cpython-310
clang -Wno-unused-result -Wsign-compare -DNDEBUG -pipe -march=native -fno-diagnostics-color -O2 -Werror=implicit-function-declaration -Werror=implicit-int -fPIC -DPy_LIMITED_API -I/usr/include/python3.10 -c _sass.c -o build/temp.linux-x86_64-cpython-310/_sass.o -fPIC -std=gnu++0x -Wall -Wno-parentheses -Werror=switch
error: invalid argument '-std=gnu++0x' not allowed with 'C'
error: command '/var/tmp/portage/dev-python/libsass-python-0.22.0/temp/clang-wrappers/clang' failed with exit code 1
 * ERROR: dev-python/libsass-python-0.22.0::gentoo failed (compile phase):

  -------------------------------------------------------------------

  This is an unstable amd64 chroot image at a tinderbox (==build bot)
  name: 17.1_desktop_plasma-j4-20221114-100928

  -------------------------------------------------------------------

GNUMAKEFLAGS="$GNUMAKEFLAGS --jobserver-style=pipe"
GNUMAKEFLAGS="$GNUMAKEFLAGS --shuffle"
CC=clang
CXX=clang++
gcc-config -l:
 [1] x86_64-pc-linux-gnu-12 *
clang/llvm (if any):
clang version 15.0.4
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm/15/bin
Configuration file: /etc/clang/clang.cfg
/usr/lib/llvm/15
15.0.4
Python 3.10.8
Available Ruby profiles:
  (none found)
Available Rust versions:
  [1]   rust-bin-1.65.0 *
The Glorious Glasgow Haskell Compilation System, version 9.0.2
php cli (if any):

  HEAD of ::gentoo
commit b8e2249d082e7e8a2de0486f2530ae7648594dbf
Author: Repository mirror & CI <[e-mail]>
Date:   Mon Nov 14 20:46:54 2022 +0000

    2022-11-14 20:46:54 UTC

emerge -qpvO dev-python/libsass-python
[ebuild  N    ] dev-python/libsass-python-0.22.0  USE="-test" PYTHON_TARGETS="python3_10 -python3_8 -python3_9 -python3_11"

[Comment 1 Toralf Förster 2022-11-14 22:24:59 UTC]

Created attachment 832709 [details]
emerge-info.txt

[Comment 2 Toralf Förster 2022-11-14 22:25:00 UTC]

Created attachment 832711 [details]
dev-python:libsass-python-0.22.0:20221114-220613.log

[Comment 3 Toralf Förster 2022-11-14 22:25:02 UTC]

Created attachment 832713 [details]
emerge-history.txt

[Comment 4 Toralf Förster 2022-11-14 22:25:03 UTC]

Created attachment 832715 [details]
environment

[Comment 5 Toralf Förster 2022-11-14 22:25:04 UTC]

Created attachment 832717 [details]
etc.clang.tar.bz2

[Comment 6 Toralf Förster 2022-11-14 22:25:05 UTC]

Created attachment 832719 [details]
etc.portage.tar.bz2

[Comment 7 Toralf Förster 2022-11-14 22:25:06 UTC]

Created attachment 832721 [details]
temp.tar.bz2

[Comment 8 Michał Górny 2022-11-15 05:49:31 UTC]

Sorry about that.  I've looked at the bug linked in [1] and not at the build log linked on our bug, and assumed it was fixed upstream.

Andrew, could you report the bug upstream?  I can't because upstream banned me for no reason (I mean, I've asked and he literally told me he doesn't know why i'm banned but he won't undo it).

[1] https://bugs.gentoo.org/730244#c2

[Comment 9 Larry the Git Cow 2022-11-15 05:57:52 UTC]

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=d102abe028aad19d4f3fb10b627b7005b2e117c9

commit d102abe028aad19d4f3fb10b627b7005b2e117c9
Author:     Michał Górny <[e-mail]>
AuthorDate: 2022-11-15 05:50:19 +0000
Commit:     Michał Górny <[e-mail]>
CommitDate: 2022-11-15 05:57:49 +0000

    dev-python/libsass-python: Remove insane CC opts again
    
    Bug: https://bugs.gentoo.org/881339
    Signed-off-by: Michał Górny <[e-mail]>

 .../{libsass-python-0.22.0.ebuild => libsass-python-0.22.0-r1.ebuild}  | 3 +++
 1 file changed, 3 insertions(+)

[Comment 10 Nowa Ammerlaan 2022-11-15 12:54:47 UTC]

(In reply to Michał Górny from comment #8)
> Sorry about that.  I've looked at the bug linked in [1] and not at the build
> log linked on our bug, and assumed it was fixed upstream.
> 
> Andrew, could you report the bug upstream?  I can't because upstream banned
> me for no reason (I mean, I've asked and he literally told me he doesn't
> know why i'm banned but he won't undo it).
> 
> [1] https://bugs.gentoo.org/730244#c2

They don't really seem interested in fixing the problem:

"Gentoo is elevating the warning to an error, that's on them"

[Comment 11 Sam James 2022-11-15 13:00:00 UTC]

We're definitely not. It's Clang that's bailing out.

Note that in this case, it's not *just* saying "unknown argument, treating as an error" (which Clang can do), it's actually saying "-std is valid for C but I have no idea what value you just told me to use" (because C++ happens to have a -std too). So it's not, in this case, an unknown option, but garbage passed into an argument which happens to be valid in C.

But it's always invalid to pass CXXFLAGS to a C compiler anyway. For example, -Werror=odr is completely valid for C++, and means nothing for C. So, even if we were, it'd be something to fix (if minor).