fix mkl library path error

ci/travis/install_dependency.sh

@@ -32,8 +32,8 @@ sudo apt-get install -y -q --no-install-recommends \
   libboost-filesystem-dev \
   libboost-system-dev \
   libboost-regex-dev \
-  intel-mkl-gnu-2019.4-243 \
-  intel-mkl-core-2019.4-243  \
+  intel-mkl-gnu-2019.5-281 \
+  intel-mkl-core-2019.5-281 \
   libmysqlclient-dev \
   clang-format-6.0 \
   clang-tidy-6.0 \
@@ -42,4 +42,4 @@ sudo apt-get install -y -q --no-install-recommends \
 sudo ln -s /usr/lib/x86_64-linux-gnu/libmysqlclient.so \
   /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so
 
-export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/opt/intel/compilers_and_libraries_2019.4.243/linux/mkl/lib/intel64
+export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/opt/intel/compilers_and_libraries_2019.5.281/linux/mkl/lib/intel64

core/src/index/cmake/ThirdPartyPackagesCore.cmake

@@ -714,9 +714,8 @@ macro(build_faiss)
 
     if (BUILD_FAISS_WITH_MKL)
 
-        find_path(MKL_LIB_PATH
+        find_library(MKL_LIB_PATH
                 NAMES "libmkl_intel_ilp64.a" "libmkl_gnu_thread.a" "libmkl_core.a"
-                PATHS /opt
                 PATH_SUFFIXES "intel/compilers_and_libraries_${MKL_VERSION}/linux/mkl/lib/intel64/")
         if (${MKL_LIB_PATH} STREQUAL "MKL_LIB_PATH-NOTFOUND")
             message(FATAL_ERROR "Could not find MKL libraries")

core/src/index/thirdparty/versions.txt

@@ -3,4 +3,5 @@ BOOST_VERSION=1.70.0
 GTEST_VERSION=1.8.1
 LAPACK_VERSION=v3.8.0
 OPENBLAS_VERSION=v0.3.6
-FAISS_VERSION=branch-0.3.0
+FAISS_VERSION=branch-0.3.0
+MKL_VERSION=2019.5.281

core/thirdparty/versions.txt

@@ -9,6 +9,5 @@ LIBUNWIND_VERSION=1.3.1
 GPERFTOOLS_VERSION=2.7
 GRPC_VERSION=master
 ZLIB_VERSION=v1.2.11
-MKL_VERSION=2019.5.281
 
 # vim: set filetype=sh: