SpiceyPy/CMakeLists.txt at main · AndrewAnnex/SpiceyPy · GitHub

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cmake_minimum_required(VERSION 3.15...3.26)
project(${SKBUILD_PROJECT_NAME} LANGUAGES C)

find_package(
  Python
  COMPONENTS Interpreter Development.Module NumPy
  REQUIRED)

include(FetchContent)

if(DEFINED EMSCRIPTEN)
  set(CMAKE_VERBOSE_MAKEFILE ON)
  set(CMAKE_RULE_MESSAGES ON)
  # might be needed for emscripten
  set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS TRUE)
endif()


# Try system/conda first
find_library(CSPICE_LIB NAMES cspice)

if(CSPICE_LIB)
  message(STATUS "Found system CSPICE: ${CSPICE_LIB}")
  add_library(CSPICE::cspice UNKNOWN IMPORTED)
  set_target_properties(CSPICE::cspice PROPERTIES IMPORTED_LOCATION "${CSPICE_LIB}")
  # look for the headers
  find_path(CSPICE_INCLUDE_DIR NAMES SpiceUsr.h PATH_SUFFIXES cspice)
  if (CSPICE_INCLUDE_DIR)
    message(STATUS "Found system CSPICE include: ${CSPICE_INCLUDE_DIR}")
    set_target_properties(CSPICE::cspice PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${CSPICE_INCLUDE_DIR}")
  else()
    message(WARNING "CSPICE library found, but headers not found")
  endif()
else()
  message(STATUS "System CSPICE not found, falling back to FetchContent")
  # we need to use this for the INSTALL_RPATH property
  set(manual_patch_cspice_origin 'yes')

  # Put CSPICE libs inside our package
  if(DEFINED EMSCRIPTEN)
    set(CMAKE_INSTALL_LIBDIR "spiceypy.libs/" CACHE INTERNAL "")
  else()
    set(CMAKE_INSTALL_LIBDIR "spiceypy/utils/" CACHE INTERNAL "")
  endif()

  if(MSVC)
    # Force DLLs to install alongside LIBs instead of bin/
    set(CMAKE_INSTALL_BINDIR "spiceypy/utils/" CACHE INTERNAL "")
  endif()

  # Put CSPICE headers somewhere harmless in our package
  set(CMAKE_INSTALL_INCLUDEDIR ${SKBUILD_NULL_DIR} CACHE INTERNAL "")

  # Also redirect data root to avoid polluting share/ etc.
  set(CMAKE_INSTALL_DATAROOTDIR ${SKBUILD_NULL_DIR} CACHE INTERNAL "")

  # Bring in your CSPICE CMake project
  FetchContent_Declare(
    cspice
    GIT_REPOSITORY https://github.com/AndrewAnnex/cspice-cmake-spiceypy.git
    GIT_TAG        658aa8b0116dc5e33a084c0aeb6eb9f9fc8fc1b3
  )
  FetchContent_MakeAvailable(cspice)

  # disable versioned/
  set_target_properties(cspice PROPERTIES
    VERSION ""      # no libmyclibrary.so.X.Y.Z
    SOVERSION ""    # no libmyclibrary.so.X
    NO_SONAME ON    # don't encode a soname
  )

endif()

##############################################################################
# cyice specifics below if not on EMSCRIPTEN

if(NOT DEFINED EMSCRIPTEN)


# Convert pyx to c
set(PYX_FILE ${CMAKE_CURRENT_SOURCE_DIR}/src/spiceypy/cyice/cyice.pyx)
set(PXD_FILE ${CMAKE_CURRENT_SOURCE_DIR}/src/spiceypy/cyice/cyice.pxd)
set(C_FILE ${CMAKE_CURRENT_BINARY_DIR}/spiceypy/cyice/cyice.c)

add_custom_command(
  OUTPUT ${C_FILE}
  COMMAND Python::Interpreter -m cython ${PYX_FILE} --output-file ${C_FILE}
  DEPENDS ${PYX_FILE} ${PXD_FILE}
  COMMENT "Cythonizing ${PYX_FILE} to ${C_FILE}"
  VERBATIM)

# Make Python extension using full dotted name for emscripten
python_add_library(cyice MODULE ${C_FILE} WITH_SOABI)
# Adjust properties using the same target name
set_target_properties(cyice PROPERTIES
  LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/spiceypy/cyice"
  OUTPUT_NAME "cyice"
)

# Link to the CSPICE target exposed by the subproject
target_include_directories(cyice PRIVATE ${Python_NumPy_INCLUDE_DIRS})

# Set numpy options to ensure no deprecated apis older than 1.7
target_compile_definitions(cyice
    PRIVATE
        NPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION
)

# Link CSPICE + math lib (only on UNIX)
if(UNIX AND NOT WIN32 AND NOT MINGW)
    target_link_libraries(cyice PRIVATE CSPICE::cspice m)
else()
    target_link_libraries(cyice PRIVATE CSPICE::cspice)
endif()

# Fix runtime search paths so extension finds libcspice in same dir if we manually install cspice
if(DEFINED manual_patch_cspice_origin)
  if(APPLE)
    set_target_properties(cyice PROPERTIES
      INSTALL_RPATH "@loader_path/../utils"
      BUILD_WITH_INSTALL_RPATH ON
    )
  elseif(UNIX AND NOT DEFINED EMSCRIPTEN)
    set_target_properties(cyice PROPERTIES
      INSTALL_RPATH "$ORIGIN/../utils"
      BUILD_WITH_INSTALL_RPATH ON
    )
  elseif(DEFINED EMSCRIPTEN)
    message(NOTICE "SETTING RPATH for emscripten")
    set_target_properties(cyice PROPERTIES
      INSTALL_RPATH "$ORIGIN/../../spiceypy.libs"
      BUILD_RPATH "$ORIGIN/../../spiceypy.libs"
      BUILD_WITH_INSTALL_RPATH ON
    )
    target_link_options(cyice PRIVATE
      -Wl,-rpath,$ORIGIN/../../spiceypy.libs
    )
  endif()
endif()

# install cyice
install(TARGETS cyice DESTINATION spiceypy/cyice/)

endif()