55 lines
1.7 KiB
CMake
55 lines
1.7 KiB
CMake
# Find the given library in the system locations, or build in-tree if not found.
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#
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# Arguments:
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# PKG_NAME - name of the package as passed to find_package
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# PKG_PATH - name of the source tree relative to extlib/
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#
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# The rest of the arguments are VARIABLE VALUE pairs. If the library is not found,
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# every VARIABLE will be set to VALUE and find_package will be rerun with the REQUIRED flag.
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# Regardless of where the library was found, only the specfied VARIABLEs that start with
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# ${PKG_NAME} will be set in the parent scope.
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#
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# All warnings in the in-tree package are disabled.
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include(DisableWarnings)
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function(find_vendored_package PKG_NAME PKG_PATH)
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find_package(${PKG_NAME})
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set(cfg_name)
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foreach(item ${ARGN})
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if(NOT cfg_name)
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set(cfg_name ${item})
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else()
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set(${cfg_name} ${item} CACHE INTERNAL "")
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set(cfg_name)
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endif()
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endforeach()
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disable_warnings()
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string(TOUPPER ${PKG_NAME} VAR_NAME)
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if(NOT ${VAR_NAME}_FOUND)
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message(STATUS "Using in-tree ${PKG_PATH}")
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set(${VAR_NAME}_IN_TREE YES CACHE INTERNAL "")
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add_subdirectory(extlib/${PKG_PATH} EXCLUDE_FROM_ALL)
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find_package(${PKG_NAME} REQUIRED)
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elseif(${VAR_NAME}_IN_TREE)
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add_subdirectory(extlib/${PKG_PATH} EXCLUDE_FROM_ALL)
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endif()
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# Now put everything we just discovered into the cache.
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set(cfg_name)
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foreach(item ${ARGN} ${VAR_NAME}_FOUND)
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if(NOT cfg_name)
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set(cfg_name ${item})
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else()
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if(cfg_name MATCHES "^${VAR_NAME}")
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set(${cfg_name} "${${cfg_name}}" CACHE INTERNAL "")
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endif()
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set(cfg_name)
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endif()
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endforeach()
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endfunction()
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