Automatic linking with SEAL and eigen in extern through CMake

.gitignore

@@ -0,0 +1,6 @@
+# Build Directory
+build/
+bin/
+
+# Vim c_tags files
+c_*

SCI/CMakeLists.txt

@@ -1,8 +1,12 @@
 cmake_minimum_required (VERSION 3.0)
 
+# Set paths to GNU gcc and g++ on Mac OS X
+set(MAC_GCC "/usr/local/bin/gcc-9")
+set(MAC_GPP "/usr/local/bin/g++-9")
+
 if(APPLE)
-    set(CMAKE_C_COMPILER "/usr/local/bin/gcc-9")
-    set(CMAKE_CXX_COMPILER "/usr/local/bin/g++-9")
+    set(CMAKE_C_COMPILER ${MAC_GCC})
+    set(CMAKE_CXX_COMPILER ${MAC_GPP})
 endif()
 
 project (SCI)
@@ -17,14 +21,7 @@ message(STATUS "Option: BUILD_NETWORKS = ${BUILD_NETWORKS}")
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 
-set(CMAKE_PREFIX_PATH
-    ${CMAKE_CURRENT_SOURCE_DIR}/extern/SEAL/native/src
-    ${CMAKE_CURRENT_SOURCE_DIR}/extern/eigen/build)
-
-include_directories(
-    ${CMAKE_CURRENT_SOURCE_DIR}/src
-    ${CMAKE_CURRENT_SOURCE_DIR}/extern/SEAL/native/src
-    ${CMAKE_CURRENT_SOURCE_DIR}/extern/eigen)
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src)
 
 if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE Release)

SCI/README.md

@@ -12,7 +12,7 @@ This directory contains the code for the Secure and Correct Inference (SCI) libr
  - SEAL 3.3.2
  - Eigen 3.3
 
-SEAL and Eigen are included in `extern/` to be compiled and installed. The other packages can be installed directly using `sudo apt-get install <package>` on Linux.
+SEAL and Eigen are included in `extern/` and are automatically compiled and installed. The other packages can be installed directly using `sudo apt-get install <package>` on Linux.
 
 ## Compilation
 

SCI/src/LinearHE/CMakeLists.txt

@@ -1,6 +1,46 @@
-find_package(SEAL 3.3.2 EXACT REQUIRED)
 find_package(OpenMP REQUIRED)
-find_package(Eigen3 3.3 REQUIRED NO_MODULE)
+# set(CMAKE_FIND_DEBUG_MODE 1)
+
+find_package(SEAL 3.3.2 EXACT QUIET)
+if (NOT SEAL_FOUND)
+    message(STATUS "SEAL 3.3.2 was not found: clone and install SEAL locally")
+    if (NOT EXISTS "${PROJECT_SOURCE_DIR}/extern/SEAL/native/src/CMakeLists.txt")
+        find_package(Git REQUIRED)
+        message(STATUS "initialize Git submodule: extern/SEAL")
+        execute_process(COMMAND git submodule update --init --recursive extern/SEAL
+                WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}")
+    endif ()
+if(APPLE)
+    execute_process(COMMAND ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_SOURCE_DIR}/build .
+        -DCMAKE_C_COMPILER=${MAC_GCC} -DCMAKE_CXX_COMPILER=${MAC_GPP}
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/extern/SEAL/native/src")
+else ()
+    execute_process(COMMAND ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_SOURCE_DIR}/build .
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/extern/SEAL/native/src")
+endif()
+    execute_process(COMMAND ${CMAKE_COMMAND} --build . --target install
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/extern/SEAL/native/src")
+    find_package(SEAL 3.3.2 EXACT REQUIRED PATHS "${PROJECT_SOURCE_DIR}/build/")
+endif ()
+
+find_package(Eigen3 3.3 NO_MODULE QUIET)
+if (NOT Eigen3_FOUND)
+    message(STATUS "Eigen 3.3 was not found: clone and install Eigen3 locally")
+    if (NOT EXISTS "${PROJECT_SOURCE_DIR}/extern/eigen/CMakeLists.txt")
+        find_package(Git REQUIRED)
+        message(STATUS "initialize Git submodule: extern/eigen")
+        execute_process(COMMAND git submodule update --init --recursive extern/eigen
+                WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}")
+    endif ()
+    execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory build
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/extern/eigen/")
+    execute_process(COMMAND ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_SOURCE_DIR}/build ..
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/extern/eigen/build")
+    execute_process(COMMAND ${CMAKE_COMMAND} --build .. --target install
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/extern/eigen/build")
+    message(STATUS "${PROJECT_SOURCE_DIR}")
+    find_package(Eigen3 3.3 REQUIRED NO_MODULE PATHS "${PROJECT_SOURCE_DIR}/build/")
+endif ()
 
 add_library(SCI-LinearHE
     conv-field.cpp
@@ -10,11 +50,10 @@ add_library(SCI-LinearHE
 )
 
 target_link_libraries(SCI-LinearHE
-    PRIVATE
+    PUBLIC
     SCI-utils
     SEAL::seal
     OpenMP::OpenMP_CXX
-    PUBLIC
     Eigen3::Eigen
 )