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141 lines
3.8 KiB
CMake
141 lines
3.8 KiB
CMake
# Filename: PackageConfig.cmake
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#
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# This modules defines functions which find and configures libraries
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# and packages for Panda3Ds configuration file headers (.h files).
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#
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# Assumes the file has already been found with find_package().
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#
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# Function: package_option
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# Usage:
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# package_option(package_name DOCSTRING
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# [DEFAULT ON | OFF]
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# [LICENSE license])
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# Examples:
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# package_option(LIBNAME "Enables LIBNAME support." DEFAULT OFF)
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#
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# If no default is given, the default in normal
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# builds is to enable all found third-party packages.
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#
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#
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# Function: target_use_packages
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# Usage:
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# target_use_packages(target [PACKAGES ...])
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# Examples:
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# target_use_packages(mylib PYTHON PNG)
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#
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#
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# package_option
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#
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function(package_option name)
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# Parse the arguments.
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set(command)
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set(default)
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set(license "")
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set(cache_string)
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foreach(arg ${ARGN})
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if(command STREQUAL "DEFAULT")
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set(default "${arg}")
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set(command)
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elseif(command STREQUAL "LICENSE")
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set(license "${arg}")
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set(command)
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elseif(arg STREQUAL "DEFAULT")
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set(command "DEFAULT")
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elseif(arg STREQUAL "LICENSE")
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set(command "LICENSE")
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else()
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# Yes, a list, because semicolons can be in there, and
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# that gets split up into multiple args, so we have to
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# join it back together here.
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list(APPEND cache_string "${arg}")
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endif()
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endforeach()
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if(command STREQUAL "DEFAULT")
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message(SEND_ERROR "DEFAULT in package_option takes an argument")
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endif()
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# If the default is not set, we set it.
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if(NOT DEFINED default)
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if(IS_DIST_BUILD)
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# Accept things that don't have a configured license
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if(license STREQUAL "")
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set(default "${${name}_FOUND}")
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else()
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list(FIND PANDA_DIST_USE_LICENSES ${license} license_index)
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# If the license isn't in the accept listed, don't use the package
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message("INDEX for ${name}: ${license_index}")
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if(${license_index} EQUAL "-1")
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set(default OFF)
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else()
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set(default "${${name}_FOUND}")
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endif()
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endif()
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elseif(IS_MINSIZE_BUILD)
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set(default OFF)
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else()
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set(default "${${name}_FOUND}")
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endif()
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endif()
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# If it was set by the user but not found, display an error.
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if(HAVE_${name} AND NOT ${name}_FOUND)
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message(SEND_ERROR "NOT FOUND: ${name}. Disable HAVE_${name} to continue.")
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endif()
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# Prevent the function from being called twice.
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# This would indicate a cmake error.
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if(PANDA_DID_SET_OPTION_${name})
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message(SEND_ERROR "package_option(${name}) was called twice.
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This is a bug in the cmake build scripts.")
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else()
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set(PANDA_DID_SET_OPTION_${name} TRUE PARENT_SCOPE)
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endif()
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# Create the option.
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option("HAVE_${name}" "${cache_string}" "${default}")
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if(HAVE_${name})
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set(_${name}_LIBRARY ${${name}_LIBRARY} CACHE INTERNAL "<Internal>")
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set(_${name}_LIBRARIES ${${name}_LIBRARIES} CACHE INTERNAL "<Internal>")
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else()
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unset(_${name}_LIBRARY CACHE)
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unset(_${name}_LIBRARIES CACHE)
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endif()
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endfunction()
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#
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# target_use_packages
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#
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# Useful macro that picks up a package located using find_package
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# as dependencies of a target that is going to be built.
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#
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macro(target_use_packages target)
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set(libs ${ARGV})
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list(REMOVE_AT libs 0)
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foreach(lib ${libs})
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if(HAVE_${lib})
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# N.B. target_include_directories is new in CMake 2.8.11; we target 2.8.4.
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#target_include_directories("${target}" PUBLIC "${${lib}_INCLUDE_DIRS};${${lib}_INCLUDE_DIR}")
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include_directories("${${lib}_INCLUDE_DIRS};${${lib}_INCLUDE_DIR}")
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if(_${lib}_LIBRARIES)
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target_link_libraries("${target}" ${_${lib}_LIBRARIES})
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else()
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target_link_libraries("${target}" ${_${lib}_LIBRARY})
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endif()
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endif()
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endforeach(lib)
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endmacro(target_use_packages)
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