Added pthreads to CMakeLists.txt.

kokkos-testing/fd_catalog/CMakeLists.txt

@@ -6,6 +6,9 @@ include(FetchContent)
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+find_package(Threads REQUIRED)
+
 option(ENABLE_KOKKOS "Enable Kokkos" ON)
 if (ENABLE_KOKKOS)
     FetchContent_Declare(kokkos
@@ -54,6 +57,7 @@ if (ENABLE_SINGLE)
     endif()
     target_compile_definitions(fd_catalog_single PUBLIC -DSINGLE_PRECISION)
     target_link_libraries(fd_catalog_single siloh5)
+    target_link_libraries(fd_catalog_single Threads::Threads)
 endif()
 
 option(ENABLE_DOUBLE "Enable double precision build" ON)
@@ -67,4 +71,5 @@ if (ENABLE_DOUBLE)
         add_executable(fd_catalog_double fd_main.cpp)
     endif()
     target_link_libraries(fd_catalog_double siloh5)
+    target_link_libraries(fd_catalog_double Threads::Threads)
 endif()