[build] Source LD_PRELOAD in env.sh and source env.sh during build, for MKL

Author: naxingyu

src/pybind/Makefile

@@ -119,6 +119,7 @@ test: all
 	make -C chain test
 	make -C cudamatrix test
 	make -C dlpack test
+	$(eval include ../../tools/env.sh)
 	make -C feat test
 	make -C fst test
 	make -C matrix test

tools/extras/install_mkl.sh

@@ -254,6 +254,15 @@ ConfigLdSo() {
     ldconfig )
 }
 
+# Load MKL libraris, which is need for pybind tests to pass
+(
+  echo "export LD_PRELOAD:=/opt/intel/mkl/lib/intel64/libmkl_def.so:\
+/opt/intel/mkl/lib/intel64/libmkl_avx2.so:\
+/opt/intel/mkl/lib/intel64/libmkl_core.so:\
+/opt/intel/mkl/lib/intel64/libmkl_intel_lp64.so:\
+/opt/intel/mkl/lib/intel64/libmkl_intel_thread.so"
+) >> env.sh
+
 # Invoke installation.
 if Install_${distro} && ConfigLdSo; then
   echo >&2 "$0: MKL package $package was successfully installed"