[build] cmake: add absl dependency for newer protobuf (#6609)

Works around a bug on some systems where protobuf does not correctly depend on required absl libraries.
wpilibsuite · May 15, 2024 · b0d3bf4 · b0d3bf4
1 parent 40b35f0
commit b0d3bf4
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/wpiutil/CMakeLists.txt b/wpiutil/CMakeLists.txt
@@ -159,6 +159,11 @@ endif()
 wpilib_target_warnings(wpiutil)
 target_link_libraries(wpiutil protobuf::libprotobuf Threads::Threads ${CMAKE_DL_LIBS})
 
+if(Protobuf_VERSION VERSION_GREATER_EQUAL 4)
+    find_package(absl REQUIRED)
+    target_link_libraries(wpiutil absl::spinlock_wait)
+endif()
+
 if(ATOMIC)
     target_link_libraries(wpiutil ${ATOMIC})
 endif()