cmake_minimum_required(VERSION 3.10)
project(EigenBenchmarks CXX)

find_package(benchmark REQUIRED)
find_package(BLAS QUIET)

# Eigen is a header-only library; find it relative to this directory.
set(EIGEN_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/..")

# Helper: add a Google Benchmark target.
#   eigen_add_benchmark(name source [LIBRARIES lib1 lib2 ...] [DEFINITIONS def1 def2 ...])
function(eigen_add_benchmark name source)
  cmake_parse_arguments(BENCH "" "" "LIBRARIES;DEFINITIONS" ${ARGN})
  if(NOT IS_ABSOLUTE "${source}")
    set(source "${CMAKE_CURRENT_SOURCE_DIR}/${source}")
  endif()
  add_executable(${name} ${source})
  target_include_directories(${name} PRIVATE ${EIGEN_SOURCE_DIR})
  target_link_libraries(${name} PRIVATE benchmark::benchmark benchmark::benchmark_main)
  if(BENCH_LIBRARIES)
    target_link_libraries(${name} PRIVATE ${BENCH_LIBRARIES})
  endif()
  target_compile_options(${name} PRIVATE
    $<$<CXX_COMPILER_ID:MSVC>:/O2>
    $<$<NOT:$<CXX_COMPILER_ID:MSVC>>:-O3>
  )
  target_compile_definitions(${name} PRIVATE NDEBUG)
  if(BENCH_DEFINITIONS)
    target_compile_definitions(${name} PRIVATE ${BENCH_DEFINITIONS})
  endif()
endfunction()

add_subdirectory(Core)
add_subdirectory(Cholesky)
add_subdirectory(LU)
add_subdirectory(QR)
add_subdirectory(SVD)
add_subdirectory(Eigenvalues)
add_subdirectory(Geometry)
add_subdirectory(Sparse)
add_subdirectory(FFT)
add_subdirectory(Householder)
add_subdirectory(Solvers)
add_subdirectory(Tuning)
add_subdirectory(BLAS)