CMakeLists.txt

# Modified by Einar J.M. Baumann (2018) <einar.baumann@gmail.com>
# Disabled testing and added install target

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(RpolyPlusPlus C CXX)
INCLUDE_DIRECTORIES(${PROJECT_SOURCE_DIR})
LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")

# By default, the unit tests will be built.
OPTION(BUILD_TESTING "Enable testing" OFF)

SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
SET(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)

# Set Minimum Eigen version and find the installed package.
SET(MIN_EIGEN_VERSION 3.2.0)

IF (USE_LOCAL_EIGEN3)
    message(STATUS "Using local Eigen3 in RpolyPlusPlus build.")
    set(EIGEN3_INCLUDE_DIR "${EIGEN3_ROOT}")
    message(STATUS "${EIGEN3_INCLUDE_DIR}")
    INCLUDE_DIRECTORIES(${EIGEN3_INCLUDE_DIR})
ELSE()
    FIND_PACKAGE(Eigen3 ${MIN_EIGEN_VERSION} REQUIRED)
    IF (EIGEN3_FOUND)
        MESSAGE(STATUS "Found Eigen version ${EIGEN3_VERSION}: ${EIGEN3_INCLUDE_DIR}")
    ENDIF (EIGEN3_FOUND)
ENDIF(USE_LOCAL_EIGEN3)


# Use a larger inlining threshold for Clang, since it hobbles Eigen,
# resulting in an unreasonably slow version of the blas routines. The
# -Qunused-arguments is needed because CMake passes the inline
# threshold to the linker and clang complains about it and dies.
IF (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
  SET(CMAKE_CXX_FLAGS
    "${CMAKE_CXX_FLAGS} -Qunused-arguments -mllvm -inline-threshold=600")
  # Older versions of Clang (<= 2.9) do not support the 'return-type-c-linkage'
  # option, so check for its presence before adding it to the default flags set.
  INCLUDE(CheckCXXCompilerFlag)
  CHECK_CXX_COMPILER_FLAG("-Wno-return-type-c-linkage"
    HAVE_RETURN_TYPE_C_LINKAGE)
  IF (HAVE_RETURN_TYPE_C_LINKAGE)
    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-return-type-c-linkage")
  ENDIF(HAVE_RETURN_TYPE_C_LINKAGE)
ENDIF ()

# NOTE: This fix came from Ceres solver with the following comment:
#
# Eigen SparseQR generates various compiler warnings related to unused and
# uninitialised local variables, which prevents Ceres compilation as we use
# -Werror.  To avoid having to individually suppress these warnings around
# the #include statments for Eigen headers across all GCC/Clang versions, we
# tell CMake to treat Eigen headers as system headers.  This results in all
# compiler warnings from them being suppressed.
#
# Note that this is *not* propagated to clients, ie CERES_INCLUDE_DIRS
# used by clients after find_package(Ceres) does not identify Eigen as
# as system headers.
#INCLUDE_DIRECTORIES(SYSTEM ${EIGEN3_INCLUDE_DIRS})

SET(RPOLY_PLUS_PLUS_SRCS
  src/polynomial.cc
  src/find_polynomial_roots_jenkins_traub.cc)

ADD_LIBRARY(rpoly_plus_plus SHARED ${RPOLY_PLUS_PLUS_SRCS})

IF (CMAKE_BUILD_TYPE STREQUAL "Debug")
  MESSAGE("\n=================================================================================")
  MESSAGE("\n-- Build type: Debug. Performance will be terrible!")
  MESSAGE("-- Add -DCMAKE_BUILD_TYPE=Release to the CMake command line to get an optimized build.")
  MESSAGE("\n=================================================================================")
ENDIF (CMAKE_BUILD_TYPE STREQUAL "Debug")

#IF (BUILD_TESTING)
  #ADD_SUBDIRECTORY(gtest)
  #INCLUDE_DIRECTORIES("${CMAKE_SOURCE_DIR}/gtest/include")
  #MACRO (GTEST FILENAME)
    #STRING(REPLACE "/" ";" TEST_NAME_LIST ${FILENAME})
    #LIST(REVERSE TEST_NAME_LIST)
    #LIST(GET TEST_NAME_LIST 0 TEST_NAME)
    #ADD_EXECUTABLE(${TEST_NAME}_test test/test_main.cc test/${FILENAME}_test.cc)
    #TARGET_LINK_LIBRARIES(${TEST_NAME}_test
      #gtest
      #rpoly_plus_plus)
    #ADD_TEST(NAME ${TEST_NAME}_test
      #COMMAND ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${TEST_NAME}_test)
  #ENDMACRO (GTEST)

  #GTEST(find_polynomial_roots_jenkins_traub)
#ENDIF (BUILD_TESTING)

# --- Add install target ---
SET(RPPP_INTERFACES
    src/find_polynomial_roots_jenkins_traub.h
    src/polynomial.h
)
set_target_properties(rpoly_plus_plus PROPERTIES PUBLIC_HEADER "${RPPP_INTERFACES}")
install(TARGETS rpoly_plus_plus DESTINATION lib
        PUBLIC_HEADER DESTINATION include/RpolyPlusPlus)