Public bug reported: The following CMakeLists.txt demonstrate the problem:
``` cmake_minimum_required(VERSION 3.16) project(capnproto-test CXX) find_package(CapnProto REQUIRED) ``` When simply running `cmake`, the following error is printed: ``` -- Looking for __atomic_load_8 in atomic -- Looking for __atomic_load_8 in atomic - not found CMake Error at /usr/lib/x86_64-linux-gnu/cmake/CapnProto/CapnProtoConfig.cmake:108 (message): libatomic not found Call Stack (most recent call first): CMakeLists.txt:3 (find_package) ``` If, instead, `CXX` is removed from `project()` call, `cmake` succeeds. Ryan Ofsky from libmultiprocess project has an analysis available at [1]. Basically, it's due to CMake's `check_library_exists()` checking for symbol in C++ namespace instead of C namespace. So I'm not sure if this is ultimately CMake's or CapnProto's fault. But since `check_library_exists()` is added by a Debian-specific patch, I file this issue against CapnProto. This is CapnProto 1.0.1-4 on Ubuntu 24.04. [1]: https://github.com/chaincodelabs/libmultiprocess/issues/68#issuecomment-1135150171 ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: libcapnp-dev 1.0.1-4 ProcVersionSignature: Ubuntu 6.5.0-35.35~22.04.1-generic 6.5.13 Uname: Linux 6.5.0-35-generic x86_64 ApportVersion: 2.28.1-0ubuntu3 Architecture: amd64 CasperMD5CheckResult: unknown CloudArchitecture: x86_64 CloudBuildName: server CloudID: lxd CloudName: lxd CloudPlatform: lxd CloudSerial: 20240608 CloudSubPlatform: LXD socket API v. 1.0 (/dev/lxd/sock) Date: Fri Jun 14 20:28:34 2024 ProcEnviron: LANG=C.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: capnproto UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: capnproto (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug cloud-image noble -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2069474 Title: CMake project with C++ part & use CapnProto fails to configure with "libatomic not found" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/capnproto/+bug/2069474/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
