diff options
| author | fuzzard <fuzzard@users.noreply.github.com> | 2022-09-05 17:15:30 +1000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-09-05 17:15:30 +1000 |
| commit | 1673f476b802da1da942cef256cae6272fdf9a4b (patch) | |
| tree | 919c6c4301214b5d99be067b92f80522e6a13c20 /cmake | |
| parent | f074f063fc7d5d7c3a5e44af5104fd142f5e30ad (diff) | |
| parent | ac3213e683e4c62c50dc02fef3b168d883245094 (diff) | |
Merge pull request #21743 from dlan17/master
[cmake] link atomic library for certain CPU architectures
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/modules/FindAtomic.cmake | 56 | ||||
| -rw-r--r-- | cmake/scripts/linux/ArchSetup.cmake | 3 |
2 files changed, 59 insertions, 0 deletions
diff --git a/cmake/modules/FindAtomic.cmake b/cmake/modules/FindAtomic.cmake new file mode 100644 index 0000000000..8ea3c815d7 --- /dev/null +++ b/cmake/modules/FindAtomic.cmake @@ -0,0 +1,56 @@ +#.rst: +# FindAtomic +# ----- +# Finds the ATOMIC library +# +# This will define the following variables:: +# +# ATOMIC_FOUND - system has ATOMIC +# ATOMIC_LIBRARIES - the ATOMIC libraries +# +# and the following imported targets:: +# +# ATOMIC::ATOMIC - The ATOMIC library + + +include(CheckCXXSourceCompiles) + +set(atomic_code + " + #include <atomic> + #include <cstdint> + std::atomic<uint8_t> n8 (0); // riscv64 + std::atomic<uint64_t> n64 (0); // armel, mipsel, powerpc + int main() { + ++n8; + ++n64; + return 0; + }") + +check_cxx_source_compiles("${atomic_code}" ATOMIC_LOCK_FREE_INSTRUCTIONS) + +if(ATOMIC_LOCK_FREE_INSTRUCTIONS) + set(ATOMIC_FOUND TRUE) + set(ATOMIC_LIBRARIES) +else() + set(CMAKE_REQUIRED_LIBRARIES "-latomic") + check_cxx_source_compiles("${atomic_code}" ATOMIC_IN_LIBRARY) + set(CMAKE_REQUIRED_LIBRARIES) + if(ATOMIC_IN_LIBRARY) + set(ATOMIC_LIBRARY atomic) + include(FindPackageHandleStandardArgs) + find_package_handle_standard_args(Atomic DEFAULT_MSG ATOMIC_LIBRARY) + set(ATOMIC_LIBRARIES ${ATOMIC_LIBRARY}) + if(NOT TARGET ATOMIC::ATOMIC) + add_library(ATOMIC::ATOMIC UNKNOWN IMPORTED) + set_target_properties(ATOMIC::ATOMIC PROPERTIES + IMPORTED_LOCATION "${ATOMIC_LIBRARY}") + endif() + unset(ATOMIC_LIBRARY) + else() + if(Atomic_FIND_REQUIRED) + message(FATAL_ERROR "Neither lock free instructions nor -latomic found.") + endif() + endif() +endif() +unset(atomic_code) diff --git a/cmake/scripts/linux/ArchSetup.cmake b/cmake/scripts/linux/ArchSetup.cmake index 35ab1402f5..848723af1f 100644 --- a/cmake/scripts/linux/ArchSetup.cmake +++ b/cmake/scripts/linux/ArchSetup.cmake @@ -199,3 +199,6 @@ if(NOT USE_INTERNAL_LIBS) set(USE_INTERNAL_LIBS OFF) endif() endif() + +# Atomic library +list(APPEND PLATFORM_REQUIRED_DEPS Atomic) |