#
# Set CGAL_DONT_OVERRIDE_CMAKE_FLAGS to TRUE if you need to prevent the CGAL configuration to
# override the flags used to build the libraries
#

if ( NOT CGAL_DONT_OVERRIDE_CMAKE_FLAGS )

  set ( CMAKE_BUILD_TYPE "${CGAL_BUILD_TYPE_INIT}" )
  
  string( TOUPPER "${CMAKE_BUILD_TYPE}" CGAL_BUILD_TYPE_UPPER )
  
  if ( CGAL_SHARED_LIBS )
    set( CGAL_LINKER_FLAGS_TYPE SHARED )
  else()
    set( CGAL_LINKER_FLAGS_TYPE MODULE )
  endif()
  
  set ( CMAKE_CXX_FLAGS "${CGAL_CXX_FLAGS_INIT}" )
  set ( CMAKE_CXX_FLAGS_${CGAL_BUILD_TYPE_UPPER} "${CGAL_CXX_FLAGS_${CGAL_BUILD_TYPE_UPPER}_INIT}" )
  set ( CMAKE_EXE_LINKER_FLAGS "${CGAL_${CGAL_LINKER_FLAGS_TYPE}_LINKER_FLAGS_INIT}" )
  set ( CMAKE_EXE_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER} "${CGAL_${CGAL_LINKER_FLAGS_TYPE}_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER}_INIT}" )
  
endif()

uniquely_add_flags( CMAKE_CXX_FLAGS                   ${CGAL_CXX_FLAGS}                   )
uniquely_add_flags( CMAKE_CXX_FLAGS_RELEASE           ${CGAL_CXX_FLAGS_RELEASE}           )
uniquely_add_flags( CMAKE_CXX_FLAGS_DEBUG             ${CGAL_CXX_FLAGS_DEBUG}             )
uniquely_add_flags( CMAKE_MODULE_LINKER_FLAGS         ${CGAL_MODULE_LINKER_FLAGS}         )
uniquely_add_flags( CMAKE_MODULE_LINKER_FLAGS_RELEASE ${CGAL_MODULE_LINKER_FLAGS_RELEASE} )
uniquely_add_flags( CMAKE_MODULE_LINKER_FLAGS_DEBUG   ${CGAL_MODULE_LINKER_FLAGS_DEBUG}   )
uniquely_add_flags( CMAKE_SHARED_LINKER_FLAGS         ${CGAL_SHARED_LINKER_FLAGS}         )
uniquely_add_flags( CMAKE_SHARED_LINKER_FLAGS_RELEASE ${CGAL_SHARED_LINKER_FLAGS_RELEASE} )
uniquely_add_flags( CMAKE_SHARED_LINKER_FLAGS_DEBUG   ${CGAL_SHARED_LINKER_FLAGS_DEBUG}   )
uniquely_add_flags( CMAKE_EXE_LINKER_FLAGS            ${CGAL_EXE_LINKER_FLAGS}            )
uniquely_add_flags( CMAKE_EXE_LINKER_FLAGS_RELEASE    ${CGAL_EXE_LINKER_FLAGS_RELEASE}    )
uniquely_add_flags( CMAKE_EXE_LINKER_FLAGS_DEBUG      ${CGAL_EXE_LINKER_FLAGS_DEBUG}      )

# Set a default build type if none is given
if ( NOT CMAKE_BUILD_TYPE )
  set ( CMAKE_BUILD_TYPE Release )
endif()

if ( NOT "${CMAKE_BUILD_TYPE}" STREQUAL "Release" AND NOT "${CMAKE_BUILD_TYPE}" STREQUAL "Debug" )
  message( FATAL_ERROR "${CMAKE_BUILD_TYPE} is not a valid build type: only Release or Debug is allowed" )
endif()

message( STATUS "Build type: ${CMAKE_BUILD_TYPE}" )

string( TOUPPER "${CMAKE_BUILD_TYPE}" CGAL_BUILD_TYPE_UPPER )

# Only one configuration type is supported
set(CMAKE_CONFIGURATION_TYPES ${CMAKE_BUILD_TYPE} )

message( STATUS "USING CUSTOM_CXXFLAGS = '${CGAL_CXX_FLAGS}  ${CGAL_CXX_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )
message( STATUS "USING        CXXFLAGS = '${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )

if ( CGAL_BUILDING_LIBS )
  if ( BUILD_SHARED_LIBS )
    message( STATUS "USING CUSTOM_LDFLAGS = '${CGAL_SHARED_LINKER_FLAGS}  ${CGAL_SHARED_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )
    message( STATUS "USING        LDFLAGS = '${CMAKE_SHARED_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )
  else()
    message( STATUS "USING CUSTOM_LDFLAGS = '${CGAL_STATIC_LINKER_FLAGS}  ${CGAL_STATIC_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )
    message( STATUS "USING        LDFLAGS = '${CMAKE_STATIC_LINKER_FLAGS} ${CMAKE_STATIC_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )
  endif()
else()
  message( STATUS "USING CUSTOM_EXEFLAGS = '${CGAL_EXE_LINKER_FLAGS}  ${CGAL_EXE_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )
  message( STATUS "USING        EXEFLAGS = '${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_${CGAL_BUILD_TYPE_UPPER}}'" )
endif()