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FindBoost: Automatically add missing component dependencies 

The function _Boost_MISSING_DEPENDENCIES will look at the
user-supplied component list, check the dependency
information for each component using
_Boost_COMPONENT_DEPENDENCIES, and will add any missing
dependencies to the component list.  This ensures that
all required components will be searched for.
This commit is contained in:
Roger Leigh 2015-12-01 21:59:00 +00:00 committed by Brad King
parent 5183c6e5dd
commit 01c80acdbd
1 changed files with 43 additions and 0 deletions
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43
Modules/FindBoost.cmake
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@ -688,6 +688,45 @@ function(_Boost_COMPONENT_DEPENDENCIES component _ret)
# message(STATUS "Dependencies for Boost::${component}: ${_boost_DEPS_STRING}")
endfunction()
#
# Determine if any missing dependencies require adding to the component list.
#
# Sets _Boost_${COMPONENT}_DEPENDENCIES for each required component,
# plus _Boost_IMPORTED_TARGETS (TRUE if imported targets should be
# defined; FALSE if dependency information is unavailable).
#
# componentvar - the component list variable name
#
#
function(_Boost_MISSING_DEPENDENCIES componentvar)
# _boost_unprocessed_components - list of components requiring processing
# _boost_processed_components - components already processed (or currently being processed)
# _boost_new_components - new components discovered for future processing
#
list(APPEND _boost_unprocessed_components ${${componentvar}})
while(_boost_unprocessed_components)
list(APPEND _boost_processed_components ${_boost_unprocessed_components})
foreach(component ${_boost_unprocessed_components})
string(TOUPPER ${component} uppercomponent)
set(${_ret} ${_Boost_${uppercomponent}_DEPENDENCIES} PARENT_SCOPE)
_Boost_COMPONENT_DEPENDENCIES("${component}" _Boost_${uppercomponent}_DEPENDENCIES)
set(_Boost_${uppercomponent}_DEPENDENCIES ${_Boost_${uppercomponent}_DEPENDENCIES} PARENT_SCOPE)
set(_Boost_IMPORTED_TARGETS ${_Boost_IMPORTED_TARGETS} PARENT_SCOPE)
foreach(componentdep ${_Boost_${uppercomponent}_DEPENDENCIES})
list(FIND _boost_processed_components "${componentdep}" _boost_component_found)
list(FIND _boost_new_components "${componentdep}" _boost_component_new)
if (_boost_component_found EQUAL -1 AND _boost_component_new EQUAL -1)
list(APPEND _boost_new_components ${componentdep})
endif()
endforeach()
endforeach()
set(_boost_unprocessed_components ${_boost_new_components})
unset(_boost_new_components)
endwhile()
set(${componentvar} ${_boost_processed_components} PARENT_SCOPE)
endfunction()
#
# End functions/macros
#
@ -1200,6 +1239,10 @@ if(Boost_VERSION AND Boost_FIND_COMPONENTS)
endif()
endif()
# Additional components may be required via component dependencies.
# Add any missing components to the list.
_Boost_MISSING_DEPENDENCIES(Boost_FIND_COMPONENTS)
# If the user changed any of our control inputs flush previous results.
if(_Boost_CHANGE_LIBDIR OR _Boost_CHANGE_LIBNAME)
foreach(COMPONENT ${_Boost_COMPONENTS_SEARCHED})