GH-44994: [C++][CMake] Use librt only for Linux (#44984)

### Rationale for this change OpenBSD does not have `librt.so`. ### What changes are included in this PR? Use `librt.so` only for Linux ### Are these changes tested? Yes. ### Are there any user-facing changes? Yes. * GitHub Issue: #44994 Lead-authored-by: Brad Smith <[email protected]> Co-authored-by: Sutou Kouhei <[email protected]> Signed-off-by: Sutou Kouhei <[email protected]>
apache · Dec 11, 2024 · e8a85dc · e8a85dc
1 parent 72dc869
commit e8a85dc
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/cpp/src/arrow/CMakeLists.txt b/cpp/src/arrow/CMakeLists.txt
@@ -166,8 +166,7 @@ if(WIN32)
   list(APPEND ARROW_SYSTEM_LINK_LIBS "ws2_32")
 endif()
 
-if(NOT WIN32 AND NOT APPLE)
-  # Pass -lrt on Linux only
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
   list(APPEND ARROW_SYSTEM_LINK_LIBS rt)
 endif()