too long lines were shrinked: clang++ -Iutils/v4l2-compliance/v4l2-compliance.p -Iutils/v4l2-compliance -I../v4l-utils-1.26.0/utils/v4l2-compliance -I../v4l-utils-1.26.0/utils/common -I../v4l-utils-1.26.0/lib/include -I../v4l-utils-1.26.0/include -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=gnu++11 In file included from ../v4l-utils-1.26.0/utils/v4l2-compliance/v4l2-test-time32-64.cpp:20: In file included from ../v4l-utils-1.26.0/utils/v4l2-compliance/v4l2-compliance.h:24: In file included from /usr/include/c++/v1/map:574: In file included from /usr/include/c++/v1/__algorithm/equal.h:13: In file included from /usr/include/c++/v1/__algorithm/comp.h:12: /usr/include/c++/v1/__config:1262:27: error: builtin feature check macro requires a parenthesized identifier 1262 | # if __has_cpp_attribute(fallthrough) | ^ ------------------------------------------------------------------- This is an unstable amd64 chroot image at a tinderbox (==build bot) name: 17.1_systemd_clang-20231210-041514 ------------------------------------------------------------------- gcc-config -l: [1] x86_64-pc-linux-gnu-10 [2] x86_64-pc-linux-gnu-13 * clang/llvm (if any): clang version 17.0.6 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/lib/llvm/17/bin Configuration file: /etc/clang/x86_64-pc-linux-gnu-clang.cfg /usr/lib/llvm/17 17.0.6+libcxx Python 3.11.7 Available Rust versions: [1] rust-bin-1.74.1 * The following VMs are available for generation-2: 1) Eclipse Temurin JDK 17.0.8.1_p1 [openjdk-bin-17] *) Eclipse Temurin JDK 21.0.1_p12 [openjdk-bin-21] 3) Eclipse Temurin JDK 8.382_p05 [openjdk-bin-8] Available Java Virtual Machines: [1] openjdk-bin-8 [2] openjdk-bin-17 [3] openjdk-bin-21 system-vm The Glorious Glasgow Haskell Compilation System, version 9.0.2 php cli (if any): go version go1.21.5 linux/amd64 HEAD of ::gentoo commit 289fe42643037d67065cf145125374545c60a15f Author: Repository mirror & CI <repomirrorci@gentoo.org> Date: Tue Dec 12 19:33:50 2023 +0000 2023-12-12 19:33:49 UTC emerge -qpvO media-libs/libv4l [ebuild N ] media-libs/libv4l-1.26.0 USE="jpeg utils -bpf -doc -dvb -qt5 -tracer" ABI_X86="(64) -32 (-x32)"
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Created attachment 878984 [details] media-libs:libv4l-1.26.0:20231212-203213.log
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I've just bumped this to 1.26.1, but I couldn't reproduce this with that version or 1.26.0. I did switch to clang/clang++.
(In reply to James Le Cuirot from comment #11) > I've just bumped this to 1.26.1, but I couldn't reproduce this with that > version or 1.26.0. I did switch to clang/clang++. I think this is libcxx specific, so you need CXXFLAGS="... -stdlib=libc++" to hit it.
(In reply to Sam James from comment #12) > I think this is libcxx specific, so you need CXXFLAGS="... -stdlib=libc++" > to hit it. I hit this bug too using clang-common[default-libcxx] No problem compiling with gcc
Only want to reconfirm, it also breaks on arm64, similar setup for clang-common with default-compiler-rt default-libcxx default-lld llvm-libunwind
Need to work out the exact fix, but so I don't forget. It's because compiler.h, which checks _LIBCPP_VERSION, is included from a .cpp file that doesn't include any C++ headers. It works when you add one.
Is there any news regarding this? Or can we have a temporary workaround just to make it compile? (it is a bit annoying to be adding --exclude libv4l to updates or binpkgs to new installs). Thanks.
Sorry, I haven't been able to prioritise this yet.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f9c320c49081d55184f4852be82b56c9e0275f84 commit f9c320c49081d55184f4852be82b56c9e0275f84 Author: James Le Cuirot <chewi@gentoo.org> AuthorDate: 2024-02-09 22:23:09 +0000 Commit: James Le Cuirot <chewi@gentoo.org> CommitDate: 2024-02-09 22:23:09 +0000 media-libs/libv4l: Patch to fix building against libc++ This has been submitted upstream. Closes: https://bugs.gentoo.org/919795 Signed-off-by: James Le Cuirot <chewi@gentoo.org> media-libs/libv4l/files/libv4l-1.26.1-libcxx.patch | 58 ++++++++++++++++++++++ media-libs/libv4l/libv4l-1.26.1.ebuild | 1 + 2 files changed, 59 insertions(+)
