diff --git a/CMakeLists.txt b/CMakeLists.txt
index 976c736f5f35..33529747f44c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -233,6 +233,8 @@ if(USE_TENSORRT)
           ${ONNX_PROTO_LIBRARY} ${ONNX_LIBRARY} ${PROTOBUF_LIBRARY})
 endif()
 
+# please note that when you enable this, you might run into an linker not being able to work properly due to large code injection.
+# you can find more information here https://github.com/apache/incubator-mxnet/issues/15971 
 if(ENABLE_TESTCOVERAGE)
   message(STATUS "Compiling with test coverage support enabled. This will result in additional files being written to your source directory!")
   find_program( GCOV_PATH gcov )
diff --git a/Makefile b/Makefile
index a14c29452f6e..4d823d0ac284 100644
--- a/Makefile
+++ b/Makefile
@@ -109,6 +109,8 @@ endif
 CFLAGS += -I$(TPARTYDIR)/mshadow/ -I$(TPARTYDIR)/dmlc-core/include -fPIC -I$(NNVM_PATH)/include -I$(DLPACK_PATH)/include -I$(TPARTYDIR)/tvm/include -Iinclude $(MSHADOW_CFLAGS)
 LDFLAGS = -pthread -ldl $(MSHADOW_LDFLAGS) $(DMLC_LDFLAGS)
 
+# please note that when you enable this, you might run into an linker not being able to work properly due to large code injection.
+# you can find more information here https://github.com/apache/incubator-mxnet/issues/15971
 ifeq ($(ENABLE_TESTCOVERAGE), 1)
         CFLAGS += --coverage
         LDFLAGS += --coverage
diff --git a/ci/docker/runtime_functions.sh b/ci/docker/runtime_functions.sh
index 2518f4c7c64f..63c369827515 100755
--- a/ci/docker/runtime_functions.sh
+++ b/ci/docker/runtime_functions.sh
@@ -299,7 +299,6 @@ build_centos7_cpu() {
     make \
         DEV=1 \
         USE_LAPACK=1 \
-        ENABLE_TESTCOVERAGE=1 \
         USE_LAPACK_PATH=/usr/lib64/liblapack.so \
         USE_BLAS=openblas \
         USE_MKLDNN=0 \
@@ -314,7 +313,6 @@ build_amzn_linux_cpu() {
     cmake \
         -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
         -DCMAKE_C_COMPILER_LAUNCHER=ccache \
-        -DENABLE_TESTCOVERAGE=ON \
         -DUSE_CUDA=OFF\
         -DUSE_OPENCV=ON\
         -DUSE_OPENMP=ON\
@@ -335,7 +333,6 @@ build_centos7_mkldnn() {
     build_ccache_wrappers
     make \
         DEV=1 \
-        ENABLE_TESTCOVERAGE=1 \
         USE_LAPACK=1 \
         USE_LAPACK_PATH=/usr/lib64/liblapack.so \
         USE_BLAS=openblas \
@@ -350,7 +347,6 @@ build_centos7_gpu() {
     build_ccache_wrappers
     make \
         DEV=1                                     \
-        ENABLE_TESTCOVERAGE=1                     \
         USE_LAPACK=1                              \
         USE_LAPACK_PATH=/usr/lib64/liblapack.so   \
         USE_BLAS=openblas                         \
@@ -374,7 +370,6 @@ build_ubuntu_cpu_openblas() {
     build_ccache_wrappers
     make \
         DEV=1                         \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=openblas             \
         USE_MKLDNN=0                  \
@@ -392,7 +387,6 @@ build_ubuntu_cpu_mkl() {
     export CXX="ccache g++"
     make \
         DEV=1                         \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=mkl                  \
         USE_MKLDNN=0                  \
@@ -410,7 +404,6 @@ build_ubuntu_cpu_cmake_debug() {
     cmake \
         -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
         -DCMAKE_C_COMPILER_LAUNCHER=ccache \
-        -DENABLE_TESTCOVERAGE=ON \
         -DUSE_CUDA=OFF \
         -DUSE_MKL_IF_AVAILABLE=OFF \
         -DUSE_OPENMP=OFF \
@@ -461,7 +454,6 @@ build_ubuntu_cpu_clang39() {
     export CC=clang-3.9
     build_ccache_wrappers
     make \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=openblas             \
         USE_MKLDNN=0                  \
@@ -479,7 +471,6 @@ build_ubuntu_cpu_clang60() {
     build_ccache_wrappers
 
     make  \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=openblas             \
         USE_MKLDNN=0                  \
@@ -525,7 +516,6 @@ build_ubuntu_cpu_clang39_mkldnn() {
     build_ccache_wrappers
 
     make \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=openblas             \
         USE_OPENMP=0                  \
@@ -542,7 +532,6 @@ build_ubuntu_cpu_clang60_mkldnn() {
     build_ccache_wrappers
 
     make \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=openblas             \
         USE_OPENMP=1                  \
@@ -557,7 +546,6 @@ build_ubuntu_cpu_mkldnn() {
 
     make  \
         DEV=1                         \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=openblas             \
         USE_SIGNAL_HANDLER=1          \
@@ -571,7 +559,6 @@ build_ubuntu_cpu_mkldnn_mkl() {
 
     make  \
         DEV=1                         \
-        ENABLE_TESTCOVERAGE=1         \
         USE_CPP_PACKAGE=1             \
         USE_BLAS=mkl                  \
         USE_SIGNAL_HANDLER=1          \
@@ -635,7 +622,6 @@ build_ubuntu_gpu_tensorrt() {
           -DUSE_OPENMP=0                          \
           -DUSE_MKLDNN=0                          \
           -DUSE_MKL_IF_AVAILABLE=OFF              \
-          -DENABLE_TESTCOVERAGE=ON                \
           -DCUDA_ARCH_NAME=Manual                 \
           -DCUDA_ARCH_BIN=$CI_CMAKE_CUDA_ARCH_BIN \
           -G Ninja                                \
@@ -651,7 +637,6 @@ build_ubuntu_gpu_mkldnn() {
 
     make  \
         DEV=1                                     \
-        ENABLE_TESTCOVERAGE=1                     \
         USE_CPP_PACKAGE=1                         \
         USE_BLAS=openblas                         \
         USE_CUDA=1                                \
@@ -669,7 +654,6 @@ build_ubuntu_gpu_mkldnn_nocudnn() {
 
     make  \
         DEV=1                                     \
-        ENABLE_TESTCOVERAGE=1                     \
         USE_BLAS=openblas                         \
         USE_CUDA=1                                \
         USE_CUDA_PATH=/usr/local/cuda             \
@@ -684,7 +668,6 @@ build_ubuntu_gpu_cuda101_cudnn7() {
     build_ccache_wrappers
     make \
         DEV=1                                     \
-        ENABLE_TESTCOVERAGE=1                     \
         USE_BLAS=openblas                         \
         USE_MKLDNN=0                              \
         USE_CUDA=1                                \
@@ -706,8 +689,7 @@ build_ubuntu_amalgamation() {
     build_ccache_wrappers
     make -C amalgamation/ clean
     make -C amalgamation/     \
-        USE_BLAS=openblas     \
-        ENABLE_TESTCOVERAGE=1
+        USE_BLAS=openblas
 }
 
 build_ubuntu_amalgamation_min() {
@@ -717,8 +699,7 @@ build_ubuntu_amalgamation_min() {
     make -C amalgamation/ clean
     make -C amalgamation/     \
         USE_BLAS=openblas     \
-        MIN=1                 \
-        ENABLE_TESTCOVERAGE=1
+        MIN=1
 }
 
 build_ubuntu_gpu_cmake_mkldnn() {
@@ -730,7 +711,6 @@ build_ubuntu_gpu_cmake_mkldnn() {
         -DCMAKE_C_COMPILER_LAUNCHER=ccache      \
         -DCMAKE_CUDA_COMPILER_LAUNCHER=ccache   \
         -DUSE_SIGNAL_HANDLER=ON                 \
-        -DENABLE_TESTCOVERAGE=ON                \
         -DUSE_CUDA=1                            \
         -DUSE_CUDNN=1                           \
         -DUSE_MKLML_MKL=1                       \
@@ -755,7 +735,6 @@ build_ubuntu_gpu_cmake() {
         -DCMAKE_C_COMPILER_LAUNCHER=ccache      \
         -DCMAKE_CUDA_COMPILER_LAUNCHER=ccache   \
         -DUSE_SIGNAL_HANDLER=ON                 \
-        -DENABLE_TESTCOVERAGE=ON                \
         -DUSE_CUDA=ON                           \
         -DUSE_CUDNN=ON                          \
         -DUSE_MKL_IF_AVAILABLE=OFF              \
@@ -781,7 +760,6 @@ build_ubuntu_cpu_large_tensor() {
         -DCMAKE_C_COMPILER_LAUNCHER=ccache      \
         -DCMAKE_CUDA_COMPILER_LAUNCHER=ccache   \
         -DUSE_SIGNAL_HANDLER=ON                 \
-        -DENABLE_TESTCOVERAGE=ON                \
         -DUSE_CUDA=OFF                          \
         -DUSE_CUDNN=OFF                         \
         -DUSE_MKLDNN=OFF                        \
@@ -802,7 +780,6 @@ build_ubuntu_gpu_large_tensor() {
         -DCMAKE_C_COMPILER_LAUNCHER=ccache      \
         -DCMAKE_CUDA_COMPILER_LAUNCHER=ccache   \
         -DUSE_SIGNAL_HANDLER=ON                 \
-        -DENABLE_TESTCOVERAGE=ON                \
         -DUSE_CUDA=ON                           \
         -DUSE_CUDNN=ON                          \
         -DUSE_MKL_IF_AVAILABLE=OFF              \
diff --git a/ci/jenkins/Jenkins_steps.groovy b/ci/jenkins/Jenkins_steps.groovy
index f653e0c5cb63..eaafc3dbcdd0 100644
--- a/ci/jenkins/Jenkins_steps.groovy
+++ b/ci/jenkins/Jenkins_steps.groovy
@@ -112,7 +112,7 @@ def compile_unix_cpu_openblas() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_openblas', false)
-            utils.pack_lib('cpu', mx_lib_cython, true)
+            utils.pack_lib('cpu', mx_lib_cython)
           }
         }
       }
@@ -126,7 +126,7 @@ def compile_unix_openblas_debug_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_cmake_debug', false)
-            utils.pack_lib('cpu_debug', mx_cmake_lib_debug, true)
+            utils.pack_lib('cpu_debug', mx_cmake_lib_debug)
           }
         }
       }
@@ -140,7 +140,7 @@ def compile_unix_int64_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_large_tensor', false)
-            utils.pack_lib('ubuntu_cpu_int64', mx_cmake_lib, true)
+            utils.pack_lib('ubuntu_cpu_int64', mx_cmake_lib)
           }
         }
       }
@@ -154,7 +154,7 @@ def compile_unix_int64_gpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_gpu_cu101', 'build_ubuntu_gpu_large_tensor', false)
-            utils.pack_lib('ubuntu_gpu_int64', mx_cmake_lib, true)
+            utils.pack_lib('ubuntu_gpu_int64', mx_cmake_lib)
           }
         }
       }
@@ -168,7 +168,7 @@ def compile_unix_mkl_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_mkl', false)
-            utils.pack_lib('cpu_mkl', mx_mkldnn_lib, true)
+            utils.pack_lib('cpu_mkl', mx_mkldnn_lib)
           }
         }
       }
@@ -182,7 +182,7 @@ def compile_unix_mkldnn_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_mkldnn', false)
-            utils.pack_lib('mkldnn_cpu', mx_mkldnn_lib, true)
+            utils.pack_lib('mkldnn_cpu', mx_mkldnn_lib)
           }
         }
       }
@@ -196,7 +196,7 @@ def compile_unix_mkldnn_mkl_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_mkldnn_mkl', false)
-            utils.pack_lib('mkldnn_mkl_cpu', mx_mkldnn_lib, true)
+            utils.pack_lib('mkldnn_mkl_cpu', mx_mkldnn_lib)
           }
         }
       }
@@ -210,7 +210,7 @@ def compile_unix_mkldnn_gpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_build_cuda', 'build_ubuntu_gpu_mkldnn', false)
-            utils.pack_lib('mkldnn_gpu', mx_mkldnn_lib, true)
+            utils.pack_lib('mkldnn_gpu', mx_mkldnn_lib)
           }
         }
       }
@@ -224,7 +224,7 @@ def compile_unix_mkldnn_nocudnn_gpu() {
            timeout(time: max_time, unit: 'MINUTES') {
              utils.init_git()
              utils.docker_run('ubuntu_build_cuda', 'build_ubuntu_gpu_mkldnn_nocudnn', false)
-             utils.pack_lib('mkldnn_gpu_nocudnn', mx_mkldnn_lib, true)
+             utils.pack_lib('mkldnn_gpu_nocudnn', mx_mkldnn_lib)
            }
          }
        }
@@ -238,7 +238,7 @@ def compile_unix_full_gpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_build_cuda', 'build_ubuntu_gpu_cuda101_cudnn7', false)
-            utils.pack_lib('gpu', mx_lib_cpp_examples, true)
+            utils.pack_lib('gpu', mx_lib_cpp_examples)
           }
         }
       }
@@ -252,7 +252,7 @@ def compile_unix_cmake_mkldnn_gpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_gpu_cu101', 'build_ubuntu_gpu_cmake_mkldnn', false)
-            utils.pack_lib('cmake_mkldnn_gpu', mx_cmake_mkldnn_lib, true)
+            utils.pack_lib('cmake_mkldnn_gpu', mx_cmake_mkldnn_lib)
           }
         }
       }
@@ -266,7 +266,7 @@ def compile_unix_cmake_gpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_gpu_cu101', 'build_ubuntu_gpu_cmake', false)
-            utils.pack_lib('cmake_gpu', mx_cmake_lib_cython, true)
+            utils.pack_lib('cmake_gpu', mx_cmake_lib_cython)
           }
         }
       }
@@ -280,7 +280,7 @@ def compile_unix_tensorrt_gpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_gpu_tensorrt', 'build_ubuntu_gpu_tensorrt', false)
-            utils.pack_lib('tensorrt', mx_tensorrt_lib, true)
+            utils.pack_lib('tensorrt', mx_tensorrt_lib)
           }
         }
       }
@@ -294,7 +294,7 @@ def compile_centos7_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('centos7_cpu', 'build_centos7_cpu', false)
-            utils.pack_lib('centos7_cpu', mx_lib, true)
+            utils.pack_lib('centos7_cpu', mx_lib)
           }
         }
       }
@@ -308,7 +308,7 @@ def compile_centos7_cpu_mkldnn() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('centos7_cpu', 'build_centos7_mkldnn', false)
-            utils.pack_lib('centos7_mkldnn', mx_mkldnn_lib, true)
+            utils.pack_lib('centos7_mkldnn', mx_mkldnn_lib)
           }
         }
       }
@@ -322,7 +322,7 @@ def compile_centos7_gpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('centos7_gpu', 'build_centos7_gpu', false)
-            utils.pack_lib('centos7_gpu', mx_lib, true)
+            utils.pack_lib('centos7_gpu', mx_lib)
           }
         }
       }
@@ -375,7 +375,7 @@ def compile_unix_clang_3_9_mkldnn_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_clang39_mkldnn', false)
-            utils.pack_lib('mkldnn_cpu_clang3', mx_mkldnn_lib, true)
+            utils.pack_lib('mkldnn_cpu_clang3', mx_mkldnn_lib)
           }
         }
       }
@@ -389,7 +389,7 @@ def compile_unix_clang_6_mkldnn_cpu() {
           timeout(time: max_time, unit: 'MINUTES') {
             utils.init_git()
             utils.docker_run('ubuntu_cpu', 'build_ubuntu_cpu_clang60_mkldnn', false)
-            utils.pack_lib('mkldnn_cpu_clang6', mx_mkldnn_lib, true)
+            utils.pack_lib('mkldnn_cpu_clang6', mx_mkldnn_lib)
           }
         }
       }
@@ -643,7 +643,7 @@ def test_unix_python2_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-python2-cpu') {
           try {
-            utils.unpack_and_init('cpu', mx_lib_cython, true)
+            utils.unpack_and_init('cpu', mx_lib_cython)
             python2_ut_cython('ubuntu_cpu')
             utils.publish_test_coverage()
           } finally {
@@ -661,7 +661,7 @@ def test_unix_python2_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-python2-gpu') {
           try {
-            utils.unpack_and_init('gpu', mx_lib, true)
+            utils.unpack_and_init('gpu', mx_lib)
             python2_gpu_ut('ubuntu_gpu_cu101')
             utils.publish_test_coverage()
           } finally {
@@ -678,7 +678,7 @@ def test_unix_python2_quantize_gpu() {
         ws('workspace/ut-python2-quantize-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
             try {
-              utils.unpack_and_init('gpu', mx_lib, true)
+              utils.unpack_and_init('gpu', mx_lib)
               utils.docker_run('ubuntu_gpu_cu101', 'unittest_ubuntu_python2_quantization_gpu', true)
               utils.publish_test_coverage()
             } finally {
@@ -695,7 +695,7 @@ def test_unix_python2_mkldnn_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-python2-mkldnn-gpu') {
           try {
-            utils.unpack_and_init('mkldnn_gpu', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_gpu', mx_mkldnn_lib)
             python2_gpu_ut('ubuntu_gpu_cu101')
             utils.publish_test_coverage()
           } finally {
@@ -711,7 +711,7 @@ def test_unix_python3_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-python3-cpu') {
           try {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             python3_ut('ubuntu_cpu')
             utils.publish_test_coverage()
           } finally {
@@ -728,7 +728,7 @@ def test_unix_python3_mkl_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-python3-cpu') {
           try {
-            utils.unpack_and_init('cpu_mkl', mx_lib, true)
+            utils.unpack_and_init('cpu_mkl', mx_lib)
             python3_ut('ubuntu_cpu')
             utils.publish_test_coverage()
           } finally {
@@ -745,7 +745,7 @@ def test_unix_python3_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-python3-gpu') {
           try {
-            utils.unpack_and_init('gpu', mx_lib_cython, true)
+            utils.unpack_and_init('gpu', mx_lib_cython)
             python3_gpu_ut_cython('ubuntu_gpu_cu101')
             utils.publish_test_coverage()
           } finally {
@@ -762,7 +762,7 @@ def test_unix_python3_quantize_gpu() {
         ws('workspace/ut-python3-quantize-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
             try {
-              utils.unpack_and_init('gpu', mx_lib, true)
+              utils.unpack_and_init('gpu', mx_lib)
               utils.docker_run('ubuntu_gpu_cu101', 'unittest_ubuntu_python3_quantization_gpu', true)
               utils.publish_test_coverage()
             } finally {
@@ -779,7 +779,7 @@ def test_unix_python3_debug_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-python3-cpu-debug') {
           try {
-            utils.unpack_and_init('cpu_debug', mx_cmake_lib_debug, true)
+            utils.unpack_and_init('cpu_debug', mx_cmake_lib_debug)
             python3_ut('ubuntu_cpu')
           } finally {
             utils.collect_test_results_unix('nosetests_unittest.xml', 'nosetests_python3_cpu_debug_unittest.xml')
@@ -795,7 +795,7 @@ def test_unix_python2_mkldnn_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-python2-mkldnn-cpu') {
           try {
-            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib)
             python2_ut('ubuntu_cpu')
             utils.publish_test_coverage()
           } finally {
@@ -813,7 +813,7 @@ def test_unix_python3_mkldnn_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-python3-mkldnn-cpu') {
           try {
-            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib)
             python3_ut_mkldnn('ubuntu_cpu')
             utils.publish_test_coverage()
           } finally {
@@ -830,7 +830,7 @@ def test_unix_python3_mkldnn_mkl_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-python3-mkldnn-mkl-cpu') {
           try {
-            utils.unpack_and_init('mkldnn_mkl_cpu', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_mkl_cpu', mx_mkldnn_lib)
             python3_ut_mkldnn('ubuntu_cpu')
             utils.publish_test_coverage()
           } finally {
@@ -847,7 +847,7 @@ def test_unix_python3_mkldnn_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-python3-mkldnn-gpu') {
           try {
-            utils.unpack_and_init('mkldnn_gpu', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_gpu', mx_mkldnn_lib)
             python3_gpu_ut('ubuntu_gpu_cu101')
             utils.publish_test_coverage()
           } finally {
@@ -863,7 +863,7 @@ def test_unix_python3_mkldnn_nocudnn_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-python3-mkldnn-gpu-nocudnn') {
           try {
-            utils.unpack_and_init('mkldnn_gpu_nocudnn', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_gpu_nocudnn', mx_mkldnn_lib)
             python3_gpu_ut_nocudnn('ubuntu_gpu_cu101')
             utils.publish_test_coverage()
           } finally {
@@ -880,7 +880,7 @@ def test_unix_python3_tensorrt_gpu() {
         ws('workspace/build-tensorrt') {
           timeout(time: max_time, unit: 'MINUTES') {
             try {
-              utils.unpack_and_init('tensorrt', mx_tensorrt_lib, true)
+              utils.unpack_and_init('tensorrt', mx_tensorrt_lib)
               utils.docker_run('ubuntu_gpu_tensorrt', 'unittest_ubuntu_tensorrt_gpu', true)
               utils.publish_test_coverage()
             } finally {
@@ -897,7 +897,7 @@ def test_unix_python3_integration_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/it-python-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('gpu', mx_lib, true)
+            utils.unpack_and_init('gpu', mx_lib)
             utils.docker_run('ubuntu_gpu_cu101', 'integrationtest_ubuntu_gpu_python', true)
             utils.publish_test_coverage()
           }
@@ -926,7 +926,7 @@ def test_unix_cpp_package_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/it-cpp-package') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('gpu', mx_lib_cpp_examples, true)
+            utils.unpack_and_init('gpu', mx_lib_cpp_examples)
             utils.docker_run('ubuntu_gpu_cu101', 'integrationtest_ubuntu_gpu_cpp_package', true)
             utils.publish_test_coverage()
           }
@@ -940,7 +940,7 @@ def test_unix_scala_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-scala-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             utils.docker_run('ubuntu_cpu', 'integrationtest_ubuntu_cpu_scala', false)
             utils.publish_test_coverage()
           }
@@ -954,7 +954,7 @@ def test_unix_scala_mkldnn_cpu(){
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-scala-mkldnn-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib)
             utils.docker_run('ubuntu_cpu', 'integrationtest_ubuntu_cpu_scala', false)
             utils.publish_test_coverage()
           }
@@ -968,7 +968,7 @@ def test_unix_scala_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-scala-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('gpu', mx_lib, true)
+            utils.unpack_and_init('gpu', mx_lib)
             utils.docker_run('ubuntu_gpu_cu101', 'integrationtest_ubuntu_gpu_scala', true)
             utils.publish_test_coverage()
           }
@@ -982,7 +982,7 @@ def test_unix_clojure_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-clojure-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             utils.docker_run('ubuntu_cpu', 'unittest_ubuntu_cpu_clojure', false)
             utils.publish_test_coverage()
           }
@@ -996,7 +996,7 @@ def test_unix_clojure_integration_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-clojure-integration-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             utils.docker_run('ubuntu_cpu', 'unittest_ubuntu_cpu_clojure_integration', false)
           }
         }
@@ -1009,7 +1009,7 @@ def test_unix_r_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-r-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             utils.docker_run('ubuntu_cpu', 'unittest_ubuntu_cpu_R', false)
             utils.publish_test_coverage()
           }
@@ -1023,7 +1023,7 @@ def test_unix_r_mkldnn_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-r-mkldnn-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib, true)
+            utils.unpack_and_init('mkldnn_cpu', mx_mkldnn_lib)
             utils.docker_run('ubuntu_cpu', 'unittest_ubuntu_minimal_R', false)
             utils.publish_test_coverage()
           }
@@ -1037,7 +1037,7 @@ def test_unix_perl_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-perl-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             utils.docker_run('ubuntu_cpu', 'unittest_ubuntu_cpugpu_perl', false)
             utils.publish_test_coverage()
           }
@@ -1051,7 +1051,7 @@ def test_unix_cpp_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-cpp-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cmake_gpu', mx_cmake_lib, true)
+            utils.unpack_and_init('cmake_gpu', mx_cmake_lib)
             utils.docker_run('ubuntu_gpu_cu101', 'unittest_cpp', true)
             utils.publish_test_coverage()
           }
@@ -1065,7 +1065,7 @@ def test_unix_cpp_mkldnn_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-cpp-mkldnn-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cmake_mkldnn_gpu', mx_cmake_mkldnn_lib, true)
+            utils.unpack_and_init('cmake_mkldnn_gpu', mx_cmake_mkldnn_lib)
             utils.docker_run('ubuntu_gpu_cu101', 'unittest_cpp', true)
             utils.publish_test_coverage()
           }
@@ -1079,7 +1079,7 @@ def test_unix_cpp_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-cpp-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu_debug', mx_cmake_lib_debug, true)
+            utils.unpack_and_init('cpu_debug', mx_cmake_lib_debug)
             utils.docker_run('ubuntu_cpu', 'unittest_cpp', false)
             utils.publish_test_coverage()
           }
@@ -1093,7 +1093,7 @@ def test_unix_perl_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-perl-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('gpu', mx_lib, true)
+            utils.unpack_and_init('gpu', mx_lib)
             utils.docker_run('ubuntu_gpu_cu101', 'unittest_ubuntu_cpugpu_perl', true)
             utils.publish_test_coverage()
           }
@@ -1107,7 +1107,7 @@ def test_unix_r_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/ut-r-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('gpu', mx_lib, true)
+            utils.unpack_and_init('gpu', mx_lib)
             utils.docker_run('ubuntu_gpu_cu101', 'unittest_ubuntu_gpu_R', true)
             utils.publish_test_coverage()
           }
@@ -1147,7 +1147,7 @@ def test_unix_onnx_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/it-onnx-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             utils.docker_run('ubuntu_cpu', 'integrationtest_ubuntu_cpu_onnx', false)
             utils.publish_test_coverage()
           }
@@ -1161,7 +1161,7 @@ def test_unix_distributed_kvstore_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/it-dist-kvstore') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('cpu', mx_lib, true)
+            utils.unpack_and_init('cpu', mx_lib)
             utils.docker_run('ubuntu_cpu', 'integrationtest_ubuntu_cpu_dist_kvstore', false)
             utils.publish_test_coverage()
           }
@@ -1175,7 +1175,7 @@ def test_unix_distributed_kvstore_gpu() {
       node(NODE_LINUX_GPU) {
         ws('workspace/it-dist-kvstore') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('gpu', mx_lib, true)
+            utils.unpack_and_init('gpu', mx_lib)
             utils.docker_run('ubuntu_gpu_cu101', 'integrationtest_ubuntu_gpu_dist_kvstore', true)
             utils.publish_test_coverage()
           }
@@ -1190,7 +1190,7 @@ def test_centos7_python3_cpu() {
         ws('workspace/build-centos7-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
             try {
-              utils.unpack_and_init('centos7_cpu', mx_lib, true)
+              utils.unpack_and_init('centos7_cpu', mx_lib)
               utils.docker_run('centos7_cpu', 'unittest_centos7_cpu', false)
               utils.publish_test_coverage()
             } finally {
@@ -1209,7 +1209,7 @@ def test_centos7_python3_gpu() {
         ws('workspace/build-centos7-gpu') {
           timeout(time: max_time, unit: 'MINUTES') {
             try {
-              utils.unpack_and_init('centos7_gpu', mx_lib, true)
+              utils.unpack_and_init('centos7_gpu', mx_lib)
               utils.docker_run('centos7_gpu', 'unittest_centos7_gpu', true)
               utils.publish_test_coverage()
             } finally {
@@ -1226,7 +1226,7 @@ def test_centos7_scala_cpu() {
       node(NODE_LINUX_CPU) {
         ws('workspace/ut-scala-centos7-cpu') {
           timeout(time: max_time, unit: 'MINUTES') {
-            utils.unpack_and_init('centos7_cpu', mx_lib, true)
+            utils.unpack_and_init('centos7_cpu', mx_lib)
             utils.docker_run('centos7_cpu', 'unittest_centos7_cpu_scala', false)
             utils.publish_test_coverage()
           }
diff --git a/ci/jenkins/Jenkinsfile_clang b/ci/jenkins/Jenkinsfile_clang
index c0af50dc3cee..029c7208107b 100644
--- a/ci/jenkins/Jenkinsfile_clang
+++ b/ci/jenkins/Jenkinsfile_clang
@@ -37,8 +37,8 @@ core_logic: {
     custom_steps.compile_unix_clang_3_9_cpu(),
     custom_steps.compile_unix_clang_6_cpu(),
     custom_steps.compile_unix_clang_tidy_cpu(),
-    custom_steps.compile_unix_clang_3_9_mkldnn_cpu()
-    // custom_steps.compile_unix_clang_6_mkldnn_cpu()
+    custom_steps.compile_unix_clang_3_9_mkldnn_cpu(),
+    custom_steps.compile_unix_clang_6_mkldnn_cpu()
   ]) 
 }
 ,
diff --git a/include/mxnet/tuple.h b/include/mxnet/tuple.h
index f018c8faabea..51f860995e74 100644
--- a/include/mxnet/tuple.h
+++ b/include/mxnet/tuple.h
@@ -199,7 +199,12 @@ class Tuple {
    * \return the corresponding dimension size
    */
   inline ValueType& operator[](int i) {
+    // it fixes the false alarm of assuming signed overflow does not occur
+    // when assuming that (X - c) > X is always false [-Werror=strict-overflow]
+    #pragma GCC diagnostic push
+    #pragma GCC diagnostic ignored "-Wstrict-overflow"
     CHECK(i >= 0 && i < ndim()) << "index = " << i << " must be in range [0, " << ndim() << ")";
+    #pragma GCC diagnostic pop
     return begin()[i];
   }
   /*!
@@ -208,7 +213,12 @@ class Tuple {
    * \return the corresponding dimension size
    */
   inline const ValueType& operator[](int i) const {
+    // it fixes the false alarm of assuming signed overflow does not occur
+    // when assuming that (X - c) > X is always false [-Werror=strict-overflow]
+    #pragma GCC diagnostic push
+    #pragma GCC diagnostic ignored "-Wstrict-overflow"
     CHECK(i >= 0 && i < ndim()) << "index = " << i << " must be in range [0, " << ndim() << ")";
+    #pragma GCC diagnostic pop
     return begin()[i];
   }
   /*!