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Skip rebuild from scratch after cmake is ran
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By commiting the patch changes, this commit prevents the libraries to be
built from scratch every time cmake is ran. This will save additional
build time.

In addition to this, this commit separates out the different
functionality to make the build system more readable. We can continue to
iterate on this in the future.

Signed-off-by: John Mazanec <[email protected]>
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jmazanec15 committed Apr 23, 2024
1 parent a2bb6cc commit 6243eba
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Showing 9 changed files with 151 additions and 152 deletions.
26 changes: 14 additions & 12 deletions .github/workflows/CI.yml
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ jobs:

name: Build and Test k-NN Plugin on Linux
runs-on: ubuntu-latest

needs: Get-CI-Image-Tag
container:
# using the same image which is used by opensearch-build team to build the OpenSearch Distribution
Expand All @@ -38,19 +39,10 @@ jobs:
with:
submodules: true

# Git functionality in CMAKE file does not work with given ubuntu image. Therefore, handling it here.
- name: Apply Git Patch
# Deleting file at the end to skip `git apply` inside CMAKE file
- name: Setup git user
run: |
cd jni/external/faiss
git apply --ignore-space-change --ignore-whitespace --3way ../../patches/faiss/0001-Custom-patch-to-support-multi-vector.patch
rm ../../patches/faiss/0001-Custom-patch-to-support-multi-vector.patch
git apply --ignore-space-change --ignore-whitespace --3way ../../patches/faiss/0002-Enable-precomp-table-to-be-shared-ivfpq.patch
rm ../../patches/faiss/0002-Enable-precomp-table-to-be-shared-ivfpq.patch
cd ../nmslib
git apply --ignore-space-change --ignore-whitespace --3way ../../patches/nmslib/0001-Initialize-maxlevel-during-add-from-enterpoint-level.patch
rm ../../patches/nmslib/0001-Initialize-maxlevel-during-add-from-enterpoint-level.patch
working-directory: ${{ github.workspace }}
git config --global user.name "github-actions[bot]"
git config --global user.email "github-actions[bot]@users.noreply.github.com"
- name: Setup Java ${{ matrix.java }}
uses: actions/setup-java@v1
Expand Down Expand Up @@ -89,6 +81,11 @@ jobs:
- name: Checkout k-NN
uses: actions/checkout@v1

- name: Setup git user
run: |
git config --global user.name "github-actions[bot]"
git config --global user.email "github-actions[bot]@users.noreply.github.com"
- name: Setup Java ${{ matrix.java }}
uses: actions/setup-java@v1
with:
Expand Down Expand Up @@ -123,6 +120,11 @@ jobs:
- name: Checkout k-NN
uses: actions/checkout@v1

- name: Setup git user
run: |
git config --global user.name "github-actions[bot]"
git config --global user.email "github-actions[bot]@users.noreply.github.com"
- name: Setup Java ${{ matrix.java }}
uses: actions/setup-java@v1
with:
Expand Down
10 changes: 10 additions & 0 deletions .github/workflows/backwards_compatibility_tests_workflow.yml
Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,11 @@ jobs:
- name: Checkout k-NN
uses: actions/checkout@v1

- name: Setup git user
run: |
git config --global user.name "github-actions[bot]"
git config --global user.email "github-actions[bot]@users.noreply.github.com"
- name: Setup Java ${{ matrix.java }}
uses: actions/setup-java@v1
with:
Expand Down Expand Up @@ -100,6 +105,11 @@ jobs:
- name: Checkout k-NN
uses: actions/checkout@v1

- name: Setup git user
run: |
git config --global user.name "github-actions[bot]"
git config --global user.email "github-actions[bot]@users.noreply.github.com"
- name: Setup Java ${{ matrix.java }}
uses: actions/setup-java@v1
with:
Expand Down
16 changes: 4 additions & 12 deletions .github/workflows/test_security.yml
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ jobs:

name: Run Integration Tests on Linux
runs-on: ubuntu-latest

needs: Get-CI-Image-Tag
container:
# using the same image which is used by opensearch-build team to build the OpenSearch Distribution
Expand All @@ -38,19 +39,10 @@ jobs:
with:
submodules: true

# Git functionality in CMAKE file does not work with given ubuntu image. Therefore, handling it here.
- name: Apply Git Patch
# Deleting file at the end to skip `git apply` inside CMAKE file
- name: Setup git user
run: |
cd jni/external/faiss
git apply --ignore-space-change --ignore-whitespace --3way ../../patches/faiss/0001-Custom-patch-to-support-multi-vector.patch
rm ../../patches/faiss/0001-Custom-patch-to-support-multi-vector.patch
git apply --ignore-space-change --ignore-whitespace --3way ../../patches/faiss/0002-Enable-precomp-table-to-be-shared-ivfpq.patch
rm ../../patches/faiss/0002-Enable-precomp-table-to-be-shared-ivfpq.patch
cd ../nmslib
git apply --ignore-space-change --ignore-whitespace --3way ../../patches/nmslib/0001-Initialize-maxlevel-during-add-from-enterpoint-level.patch
rm ../../patches/nmslib/0001-Initialize-maxlevel-during-add-from-enterpoint-level.patch
working-directory: ${{ github.workspace }}
git config --global user.name "github-actions[bot]"
git config --global user.email "github-actions[bot]@users.noreply.github.com"
- name: Setup Java ${{ matrix.java }}
uses: actions/setup-java@v1
Expand Down
4 changes: 1 addition & 3 deletions .gitignore
Original file line number Diff line number Diff line change
Expand Up @@ -17,9 +17,7 @@ oss/*
jni/CMakeCache.txt
jni/CMakeFiles
jni/Makefile
jni/cmake*
jni/CPack*
jni/_CPack*
jni/cmake_install.cmake
jni/release
jni/packages
jni/CTestTestfile.cmake
Expand Down
1 change: 1 addition & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
### Infrastructure
* Add micro-benchmark module in k-NN plugin for benchmark streaming vectors to JNI layer functionality. [#1583](https://github.com/opensearch-project/k-NN/pull/1583)
* Add arm64 check when SIMD is disabled [#1618](https://github.com/opensearch-project/k-NN/pull/1618)
* Skip rebuild from scratch after cmake is ran [#1636](https://github.com/opensearch-project/k-NN/pull/1636)
### Documentation
### Maintenance
### Refactoring
136 changes: 11 additions & 125 deletions jni/CMakeLists.txt
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,8 @@ cmake_minimum_required(VERSION 3.23.1)

project(KNNPlugin_JNI)

include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/macros.cmake)

# ---------------------------------- SETUP ----------------------------------
# Target libraries to be compiled
# Shared library with common utilities. Not a JNI library. Other JNI libs should depend on this one.
Expand All @@ -29,6 +31,9 @@ else()
set(CONFIG_ALL OFF)
endif ()

execute_process(COMMAND git config -l WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/external/nmslib ERROR_VARIABLE ERROR_MSG RESULT_VARIABLE RESULT_CODE)
execute_process(COMMAND git config -l WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/external/faiss ERROR_VARIABLE ERROR_MSG RESULT_VARIABLE RESULT_CODE)

# Set OS specific variables
if (${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
set(CMAKE_MACOSX_RPATH 1)
Expand Down Expand Up @@ -65,144 +70,34 @@ endif()
# ---------------------------------- UTIL ----------------------------------
add_library(${TARGET_LIB_UTIL} SHARED ${CMAKE_CURRENT_SOURCE_DIR}/src/jni_util.cpp ${CMAKE_CURRENT_SOURCE_DIR}/src/commons.cpp)
target_include_directories(${TARGET_LIB_UTIL} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include $ENV{JAVA_HOME}/include $ENV{JAVA_HOME}/include/${JVM_OS_TYPE})
set_target_properties(${TARGET_LIB_UTIL} PROPERTIES SUFFIX ${LIB_EXT})
set_target_properties(${TARGET_LIB_UTIL} PROPERTIES POSITION_INDEPENDENT_CODE ON)

if (NOT "${WIN32}" STREQUAL "")
# Use RUNTIME_OUTPUT_DIRECTORY, to build the target library (opensearchknn_util) in the specified directory at runtime.
set_target_properties(${TARGET_LIB_UTIL} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
else()
set_target_properties(${TARGET_LIB_UTIL} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
endif()

opensearch_set_common_properties(${TARGET_LIB_UTIL})
list(APPEND TARGET_LIBS ${TARGET_LIB_UTIL})
# ----------------------------------------------------------------------------

# ---------------------------------- COMMON ----------------------------------
add_library(${TARGET_LIB_COMMON} SHARED ${CMAKE_CURRENT_SOURCE_DIR}/src/org_opensearch_knn_jni_JNICommons.cpp)
target_link_libraries(${TARGET_LIB_COMMON} ${TARGET_LIB_UTIL})
target_include_directories(${TARGET_LIB_COMMON} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include $ENV{JAVA_HOME}/include $ENV{JAVA_HOME}/include/${JVM_OS_TYPE})
set_target_properties(${TARGET_LIB_COMMON} PROPERTIES SUFFIX ${LIB_EXT})
set_target_properties(${TARGET_LIB_COMMON} PROPERTIES POSITION_INDEPENDENT_CODE ON)

if (NOT "${WIN32}" STREQUAL "")
# Use RUNTIME_OUTPUT_DIRECTORY, to build the target library (opensearchknn_common) in the specified directory at runtime.
set_target_properties(${TARGET_LIB_COMMON} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
else()
set_target_properties(${TARGET_LIB_COMMON} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
endif()

opensearch_set_common_properties(${TARGET_LIB_COMMON})
list(APPEND TARGET_LIBS ${TARGET_LIB_COMMON})
# ----------------------------------------------------------------------------

# ---------------------------------- NMSLIB ----------------------------------
if (${CONFIG_NMSLIB} STREQUAL ON OR ${CONFIG_ALL} STREQUAL ON OR ${CONFIG_TEST} STREQUAL ON)
# Check if nmslib exists
find_path(NMS_REPO_DIR NAMES similarity_search PATHS ${CMAKE_CURRENT_SOURCE_DIR}/external/nmslib NO_DEFAULT_PATH)

# If not, pull the updated submodule
if (NOT EXISTS ${NMS_REPO_DIR})
message(STATUS "Could not find nmslib. Pulling updated submodule.")
execute_process(COMMAND git submodule update --init -- external/nmslib WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
endif ()

# Check if patch exist, this is to skip git apply during CI build. See CI.yml with ubuntu.
find_path(PATCH_FILE NAMES 0001-Initialize-maxlevel-during-add-from-enterpoint-level.patch PATHS ${CMAKE_CURRENT_SOURCE_DIR}/patches/nmslib NO_DEFAULT_PATH)

# If it exists, apply patches
if (EXISTS ${PATCH_FILE})
message(STATUS "Applying custom patches.")
execute_process(COMMAND git apply --ignore-space-change --ignore-whitespace --3way ${CMAKE_CURRENT_SOURCE_DIR}/patches/nmslib/0001-Initialize-maxlevel-during-add-from-enterpoint-level.patch WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/external/nmslib ERROR_VARIABLE ERROR_MSG RESULT_VARIABLE RESULT_CODE)

if(RESULT_CODE)
message(FATAL_ERROR "Failed to apply patch:\n${ERROR_MSG}")
endif()
endif()

add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/external/nmslib/similarity_search)

include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/init-nmslib.cmake)
add_library(${TARGET_LIB_NMSLIB} SHARED ${CMAKE_CURRENT_SOURCE_DIR}/src/org_opensearch_knn_jni_NmslibService.cpp ${CMAKE_CURRENT_SOURCE_DIR}/src/nmslib_wrapper.cpp)
target_link_libraries(${TARGET_LIB_NMSLIB} NonMetricSpaceLib ${TARGET_LIB_UTIL})
target_include_directories(${TARGET_LIB_NMSLIB} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include $ENV{JAVA_HOME}/include $ENV{JAVA_HOME}/include/${JVM_OS_TYPE} ${CMAKE_CURRENT_SOURCE_DIR}/external/nmslib/similarity_search/include)
set_target_properties(${TARGET_LIB_NMSLIB} PROPERTIES SUFFIX ${LIB_EXT})
set_target_properties(${TARGET_LIB_NMSLIB} PROPERTIES POSITION_INDEPENDENT_CODE ON)

if (NOT "${WIN32}" STREQUAL "")
# Use RUNTIME_OUTPUT_DIRECTORY, to build the target library (opensearchknn_nmslib) in the specified directory at runtime.
set_target_properties(${TARGET_LIB_NMSLIB} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
else()
set_target_properties(${TARGET_LIB_NMSLIB} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
endif()

opensearch_set_common_properties(${TARGET_LIB_NMSLIB})
list(APPEND TARGET_LIBS ${TARGET_LIB_NMSLIB})
endif ()

# ---------------------------------------------------------------------------

# ---------------------------------- FAISS ----------------------------------
if (${CONFIG_FAISS} STREQUAL ON OR ${CONFIG_ALL} STREQUAL ON OR ${CONFIG_TEST} STREQUAL ON)
set(BUILD_TESTING OFF) # Avoid building faiss tests
set(BLA_STATIC ON) # Statically link BLAS

if(NOT DEFINED SIMD_ENABLED)
set(SIMD_ENABLED true) # set default value as true if the argument is not set
endif()

if(${CMAKE_SYSTEM_NAME} STREQUAL Windows OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES "aarch64" OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES "arm64" OR NOT ${SIMD_ENABLED})
set(FAISS_OPT_LEVEL generic) # Keep optimization level as generic on Windows OS as it is not supported due to MINGW64 compiler issue. Also, on aarch64 avx2 is not supported.
set(TARGET_LINK_FAISS_LIB faiss)
else()
set(FAISS_OPT_LEVEL avx2) # Keep optimization level as avx2 to improve performance on Linux and Mac.
set(TARGET_LINK_FAISS_LIB faiss_avx2)
string(PREPEND LIB_EXT "_avx2") # Prepend "_avx2" to lib extension to create the library as "libopensearchknn_faiss_avx2.so" on linux and "libopensearchknn_faiss_avx2.jnilib" on mac
endif()

if (${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
if(CMAKE_C_COMPILER_ID MATCHES "Clang\$")
set(OpenMP_C_FLAGS "-Xpreprocessor -fopenmp")
set(OpenMP_C_LIB_NAMES "omp")
set(OpenMP_omp_LIBRARY /usr/local/opt/libomp/lib/libomp.dylib)
endif()

if(CMAKE_CXX_COMPILER_ID MATCHES "Clang\$")
set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -I/usr/local/opt/libomp/include")
set(OpenMP_CXX_LIB_NAMES "omp")
set(OpenMP_omp_LIBRARY /usr/local/opt/libomp/lib/libomp.dylib)
endif()
endif()

include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/init-faiss.cmake)
find_package(OpenMP REQUIRED)
find_package(ZLIB REQUIRED)
find_package(BLAS REQUIRED)
enable_language(Fortran)
find_package(LAPACK REQUIRED)

# Check if faiss exists
find_path(FAISS_REPO_DIR NAMES faiss PATHS ${CMAKE_CURRENT_SOURCE_DIR}/external/faiss NO_DEFAULT_PATH)

# If not, pull the updated submodule
if (NOT EXISTS ${FAISS_REPO_DIR})
message(STATUS "Could not find faiss. Pulling updated submodule.")
execute_process(COMMAND git submodule update --init -- external/faiss WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
endif ()

# Check if patch exist, this is to skip git apply during CI build. See CI.yml with ubuntu.
find_path(PATCH_FILE NAMES 0001-Custom-patch-to-support-multi-vector.patch 0002-Enable-precomp-table-to-be-shared-ivfpq.patch PATHS ${CMAKE_CURRENT_SOURCE_DIR}/patches/faiss NO_DEFAULT_PATH)

# If it exists, apply patches
if (EXISTS ${PATCH_FILE})
message(STATUS "Applying custom patches.")
execute_process(COMMAND git apply --ignore-space-change --ignore-whitespace --3way ${CMAKE_CURRENT_SOURCE_DIR}/patches/faiss/0001-Custom-patch-to-support-multi-vector.patch WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/external/faiss ERROR_VARIABLE ERROR_MSG RESULT_VARIABLE RESULT_CODE)
execute_process(COMMAND git apply --ignore-space-change --ignore-whitespace --3way ${CMAKE_CURRENT_SOURCE_DIR}/patches/faiss/0002-Enable-precomp-table-to-be-shared-ivfpq.patch WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/external/faiss ERROR_VARIABLE ERROR_MSG RESULT_VARIABLE RESULT_CODE)
if(RESULT_CODE)
message(FATAL_ERROR "Failed to apply patch:\n${ERROR_MSG}")
endif()
endif()

set(FAISS_ENABLE_GPU OFF)
set(FAISS_ENABLE_PYTHON OFF)
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/external/faiss EXCLUDE_FROM_ALL)

add_library(
${TARGET_LIB_FAISS} SHARED
${CMAKE_CURRENT_SOURCE_DIR}/src/org_opensearch_knn_jni_FaissService.cpp
Expand All @@ -216,16 +111,7 @@ if (${CONFIG_FAISS} STREQUAL ON OR ${CONFIG_ALL} STREQUAL ON OR ${CONFIG_TEST} S
$ENV{JAVA_HOME}/include/${JVM_OS_TYPE}
${CMAKE_CURRENT_SOURCE_DIR}/external/faiss
)
set_target_properties(${TARGET_LIB_FAISS} PROPERTIES SUFFIX ${LIB_EXT})
set_target_properties(${TARGET_LIB_FAISS} PROPERTIES POSITION_INDEPENDENT_CODE ON)

if (NOT "${WIN32}" STREQUAL "")
# Use RUNTIME_OUTPUT_DIRECTORY, to build the target library (opensearchknn_faiss) in the specified directory at runtime.
set_target_properties(${TARGET_LIB_FAISS} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
else()
set_target_properties(${TARGET_LIB_FAISS} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/release)
endif()

opensearch_set_common_properties(${TARGET_LIB_FAISS})
list(APPEND TARGET_LIBS ${TARGET_LIB_FAISS})
endif ()

Expand Down
66 changes: 66 additions & 0 deletions jni/cmake/init-faiss.cmake
Original file line number Diff line number Diff line change
@@ -0,0 +1,66 @@
#
# Copyright OpenSearch Contributors
# SPDX-License-Identifier: Apache-2.0
#

# Check if faiss exists
find_path(FAISS_REPO_DIR NAMES faiss PATHS ${CMAKE_CURRENT_SOURCE_DIR}/external/faiss NO_DEFAULT_PATH)

# If not, pull the updated submodule
if (NOT EXISTS ${FAISS_REPO_DIR})
message(STATUS "Could not find faiss. Pulling updated submodule.")
execute_process(COMMAND git submodule update --init -- external/faiss WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
endif ()

# Check if patch exist, this is to skip git apply during CI build. See CI.yml with ubuntu.
find_path(PATCH_FILE NAMES 0001-Custom-patch-to-support-multi-vector.patch 0002-Enable-precomp-table-to-be-shared-ivfpq.patch PATHS ${CMAKE_CURRENT_SOURCE_DIR}/patches/faiss NO_DEFAULT_PATH)

# If it exists, apply patches
if (EXISTS ${PATCH_FILE})
message(STATUS "Applying custom patches.")
execute_process(COMMAND git am --3way ${CMAKE_CURRENT_SOURCE_DIR}/patches/faiss/0001-Custom-patch-to-support-multi-vector.patch WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/external/faiss ERROR_VARIABLE ERROR_MSG RESULT_VARIABLE RESULT_CODE)
execute_process(COMMAND git am --3way ${CMAKE_CURRENT_SOURCE_DIR}/patches/faiss/0002-Enable-precomp-table-to-be-shared-ivfpq.patch WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/external/faiss ERROR_VARIABLE ERROR_MSG RESULT_VARIABLE RESULT_CODE)
if(RESULT_CODE)
message(FATAL_ERROR "Failed to apply patch:\n${ERROR_MSG}")
endif()
endif()

if (${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
if(CMAKE_C_COMPILER_ID MATCHES "Clang\$")
set(OpenMP_C_FLAGS "-Xpreprocessor -fopenmp")
set(OpenMP_C_LIB_NAMES "omp")
set(OpenMP_omp_LIBRARY /usr/local/opt/libomp/lib/libomp.dylib)
endif()

if(CMAKE_CXX_COMPILER_ID MATCHES "Clang\$")
set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -I/usr/local/opt/libomp/include")
set(OpenMP_CXX_LIB_NAMES "omp")
set(OpenMP_omp_LIBRARY /usr/local/opt/libomp/lib/libomp.dylib)
endif()
endif()

find_package(ZLIB REQUIRED)
find_package(BLAS REQUIRED)
enable_language(Fortran)
find_package(LAPACK REQUIRED)

# Set relevant properties
set(BUILD_TESTING OFF) # Avoid building faiss tests
set(BLA_STATIC ON) # Statically link BLAS
set(FAISS_ENABLE_GPU OFF)
set(FAISS_ENABLE_PYTHON OFF)

if(NOT DEFINED SIMD_ENABLED)
set(SIMD_ENABLED true) # set default value as true if the argument is not set
endif()

if(${CMAKE_SYSTEM_NAME} STREQUAL Windows OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES "aarch64" OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES "arm64" OR NOT ${SIMD_ENABLED})
set(FAISS_OPT_LEVEL generic) # Keep optimization level as generic on Windows OS as it is not supported due to MINGW64 compiler issue. Also, on aarch64 avx2 is not supported.
set(TARGET_LINK_FAISS_LIB faiss)
else()
set(FAISS_OPT_LEVEL avx2) # Keep optimization level as avx2 to improve performance on Linux and Mac.
set(TARGET_LINK_FAISS_LIB faiss_avx2)
string(PREPEND LIB_EXT "_avx2") # Prepend "_avx2" to lib extension to create the library as "libopensearchknn_faiss_avx2.so" on linux and "libopensearchknn_faiss_avx2.jnilib" on mac
endif()

add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/external/faiss EXCLUDE_FROM_ALL)
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