Revert "Use parallel-jobs to speed up the build. (#216)"

This reverts commit 321945de.

CMakeLists.txt

@@ -105,11 +105,6 @@ if(NOT (("${CMAKE_CXX_COMPILER}" MATCHES ".*hipcc") OR ("${CMAKE_CXX_COMPILER}"
   message(FATAL_ERROR "On ROCm platform 'hipcc' or HIP-aware Clang must be used as C++ compiler.")
 endif()
 
-check_cxx_compiler_flag("-parallel-jobs=12" HAVE_PARALLEL_JOBS)
-if (HAVE_PARALLEL_JOBS)
-  message(STATUS "Parallel jobs enabled")
-endif()
-
 ## Check for Threads
 find_package(Threads REQUIRED)
 set(THREADS_PREFER_PTHREAD_FLAG ON)
@@ -168,10 +163,6 @@ if(IBVERBS_FOUND)
   target_link_libraries(TransferBench PRIVATE ${IBVERBS_LIBRARY})
   target_compile_definitions(TransferBench PRIVATE NIC_EXEC_ENABLED)
 endif()
-if (HAVE_PARALLEL_JOBS)
-  target_compile_options(TransferBench PRIVATE -parallel-jobs=12)
-endif()
-
 
 target_link_libraries(TransferBench PRIVATE -fgpu-rdc)             # Required when linking relocatable device code
 target_link_libraries(TransferBench PRIVATE Threads::Threads)
@@ -180,15 +171,6 @@ target_link_libraries(TransferBench PRIVATE hip::device)
 target_link_libraries(TransferBench PRIVATE dl)
 target_link_libraries(TransferBench PRIVATE ${NUMA_LIBRARY})
 target_link_libraries(TransferBench PRIVATE ${HSA_LIBRARY})
-## Reserve 16GB for each linker job. Limit max number of linker jobs to 16
-if (HAVE_PARALLEL_JOBS)
-  math(EXPR num_linker_jobs "(${memory_in_gb} + 15) / 16")
-  if (${num_linker_jobs} GREATER_EQUAL "16")
-    set(num_linker_jobs "16")
-  endif()
-  message(STATUS "Use ${num_linker_jobs} jobs for linking")
-  target_link_options(TransferBench PRIVATE -parallel-jobs=${num_linker_jobs})       # Use multiple threads to link
-endif()
 
 rocm_install(TARGETS TransferBench COMPONENT devel)
 rocm_setup_version(VERSION ${VERSION_STRING})