#

# Input variables:

# - `CGAL_INCLUDE_DIR`

# - `CGAL_LIBRARY_DIR`

# - `GMP_INCLUDE_DIR`

# - `GMP_LIBRARY_DIR`

# - `MPFR_INCLUDE_DIR`

# - `MPFR_LIBRARY_DIR`

# If input variables are not specified, try to find HDF5 config.

# Input variables could also be provided as environment variables.

#

# Output targets:

# - `IFCOPENSHELL_CGAL`

#

if(TARGET IFCOPENSHELL_CGAL)

return()

endif()

UNIFY_ENVVARS_AND_CACHE(CGAL_INCLUDE_DIR)

UNIFY_ENVVARS_AND_CACHE(CGAL_LIBRARY_DIR)

UNIFY_ENVVARS_AND_CACHE(GMP_INCLUDE_DIR)

UNIFY_ENVVARS_AND_CACHE(GMP_LIBRARY_DIR)

UNIFY_ENVVARS_AND_CACHE(MPFR_INCLUDE_DIR)

UNIFY_ENVVARS_AND_CACHE(MPFR_LIBRARY_DIR)

if(CGAL_INCLUDE_DIR)

find_library(libGMP NAMES gmp mpir PATHS ${GMP_LIBRARY_DIR} NO_DEFAULT_PATH)

find_library(libMPFR NAMES mpfr PATHS ${MPFR_LIBRARY_DIR} NO_DEFAULT_PATH)

if(NOT libGMP)

message(FATAL_ERROR "Unable to find GMP library files, aborting")

endif()

if(NOT libMPFR)

message(FATAL_ERROR "Unable to find MPFR library files, aborting")

endif()

add_library(CGAL::CGAL INTERFACE IMPORTED)

target_include_directories(CGAL::CGAL INTERFACE "${CGAL_INCLUDE_DIR}")

target_include_directories(CGAL::CGAL INTERFACE "${GMP_INCLUDE_DIR}" "${MPFR_INCLUDE_DIR}")

target_link_libraries(CGAL::CGAL INTERFACE "${libMPFR}" "${libGMP}")

else()

# CGAL is not respecting default Boost_USE_STATIC_LIBS value

# and sometiems it's getting in the way.

if(NOT DEFINED Boost_USE_STATIC_LIBS)

set(CGAL_Boost_USE_STATIC_LIBS OFF)

else()

set(CGAL_Boost_USE_STATIC_LIBS "${Boost_USE_STATIC_LIBS}")

endif()

# Annoyingly this is producing CMP0167 boost warnings, because it's unsetting cmake policies

# and using FindBoost module. But there's nothing we can do about it,

# since everything happens in the scope of CGAL config. I guess it's be resolved in CGAL 6.1.0.

find_package(CGAL CONFIG)

if(NOT CGAL_FOUND)

message(

FATAL_ERROR

"CGAL_SUPPORT enabled, but CGAL_INCLUDE_DIR wasn't provided and CGAL package couldn't be found."

)

endif()

message(STATUS "CGAL: found config at '${CGAL_DIR}'.")

endif()

# Adding another `IFCOPENSHELL_CGAL` target, because we want to add compile definitions to it,

# but in `CGALconfig.cmake` `CGAL::CGAL` is an alias, so you can't add properties to it.

add_library(IFCOPENSHELL_CGAL INTERFACE)

target_link_libraries(IFCOPENSHELL_CGAL INTERFACE CGAL::CGAL)

target_compile_definitions(IFCOPENSHELL_CGAL INTERFACE IFOPSH_WITH_CGAL)

set(SWIG_DEFINES ${SWIG_DEFINES} -DIFOPSH_WITH_CGAL)

install(TARGETS IFCOPENSHELL_CGAL EXPORT ${IFCOPENSHELL_EXPORT_TARGETS})