Use LLVM/Clang as CMake compiler
Published:
Switch to LLVM/Clang compiler for CMake (Ubuntu 22.04 aarch64 on Apple Silicon via Multipass)
A package I work with compiles fine on Linux AMD, but crashes in a firey hell on my Mac.
find_package(OpenMP)
if (OPENMP_FOUND
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif()
Results in:
CMake Error at CMakeLists.txt:161 (add_executable):
Target "s_graphs_prefiltering_node" links to target "OpenMP::OpenMP_CXX"
but the target was not found. Perhaps a find_package() call is missing for
an IMPORTED target, or an ALIAS target is missing?
Check libomp-dev is installed:
$ apt show libomp-dev
Package: libomp-dev
Version: 1:14.0-55~exp2
Priority: extra
Section: universe/libdevel
Source: llvm-defaults (0.55~exp2)
Origin: Ubuntu
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: LLVM Packaging Team <pkg-llvm-team@lists.alioth.debian.org>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 16.4 kB
Depends: libomp-14-dev (>= 14~)
Download-Size: 3074 B
APT-Manual-Installed: yes
APT-Sources: http://ports.ubuntu.com/ubuntu-ports jammy/universe arm64 Packages
Description: LLVM OpenMP runtime - dev package
The runtime is the part of the OpenMP implementation that your code is
linked against, and that manages the multiple threads in an OpenMP program
while it is executing.
This is a dependency package providing the default LLVM OpenMP dev
package.