2025-06-06 22:52:23 -04:00
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# ===================================================================================
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# FindLibDwarf.cmake
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#
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# Find libdw include dirs and libraries
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#
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# ----------------------------------------
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#
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# Use this module by invoking find_package with the form::
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#
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# find_package(LibDwarf [version] [EXACT] # Minimum or EXACT version e.g. 0.173
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# [REQUIRED] # Fail with error if libdw is not found )
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#
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# This module reads hints about search locations from variables::
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#
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# LibDwarf_ROOT_DIR - Base directory the of libdw installation
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# LibDwarf_INCLUDEDIR - Hint directory that contains the libdw headers files
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# LibDwarf_LIBRARYDIR - Hint directory that contains the libdw library files
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#
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# and saves search results persistently in CMake cache entries::
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#
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# LibDwarf_FOUND - True if headers and requested libraries were found
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# LibDwarf_INCLUDE_DIRS - libdw include directories LibDwarf_LIBRARY_DIRS - Link
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# directories for libdw libraries LibDwarf_LIBRARIES - libdw library files
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#
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# ===================================================================================
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# Non-standard subdirectories to search
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set(_path_suffixes libdw libdwarf elfutils)
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find_path(
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LibDwarf_INCLUDE_DIR
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NAMES libdw.h
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HINTS ${LibDwarf_ROOT_DIR}/include ${LibDwarf_ROOT_DIR} ${LibDwarf_INCLUDEDIR}
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PATHS ${DYNINST_SYSTEM_INCLUDE_PATHS}
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PATH_SUFFIXES ${_path_suffixes}
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2025-06-22 10:44:33 -04:00
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DOC "libdw include directories"
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)
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2025-06-06 22:52:23 -04:00
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find_library(
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LibDwarf_LIBRARIES
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NAMES libdw.so.1 libdw.so
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HINTS ${LibDwarf_ROOT_DIR}/lib ${LibDwarf_ROOT_DIR} ${LibDwarf_LIBRARYDIR}
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PATHS ${DYNINST_SYSTEM_LIBRARY_PATHS}
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2025-06-22 10:44:33 -04:00
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PATH_SUFFIXES ${_path_suffixes}
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)
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2025-06-06 22:52:23 -04:00
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# Find the library with the highest version
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set(_max_ver 0.0)
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set(_max_ver_lib)
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foreach(l ${LibDwarf_LIBRARIES})
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get_filename_component(_dw_realpath ${LibDwarf_LIBRARIES} REALPATH)
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string(REGEX MATCH "libdw\\-(.+)\\.so\\.*$" res ${_dw_realpath})
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# The library version number is stored in CMAKE_MATCH_1
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set(_cur_ver ${CMAKE_MATCH_1})
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if(${_cur_ver} VERSION_GREATER ${_max_ver})
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set(_max_ver ${_cur_ver})
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set(_max_ver_lib ${l})
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endif()
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endforeach()
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# Set the exported variables to the best match
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set(LibDwarf_LIBRARIES ${_max_ver_lib})
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set(LibDwarf_VERSION ${_max_ver})
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(
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LibDwarf
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FOUND_VAR LibDwarf_FOUND
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REQUIRED_VARS LibDwarf_LIBRARIES LibDwarf_INCLUDE_DIR
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2025-06-22 10:44:33 -04:00
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VERSION_VAR LibDwarf_VERSION
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)
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2025-06-06 22:52:23 -04:00
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# Export cache variables
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if(LibDwarf_FOUND)
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set(LibDwarf_INCLUDE_DIRS ${LibDwarf_INCLUDE_DIR})
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set(LibDwarf_LIBRARIES ${LibDwarf_LIBRARIES})
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# Because we only report the library with the largest version, we are guaranteed there
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# is only one file in LibDwarf_LIBRARIES
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get_filename_component(_dw_dir ${LibDwarf_LIBRARIES} DIRECTORY)
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set(LibDwarf_LIBRARY_DIRS ${_dw_dir})
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add_library(LibDwarf::LibDwarf INTERFACE IMPORTED)
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target_include_directories(LibDwarf::LibDwarf INTERFACE ${LibDwarf_INCLUDE_DIR})
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target_link_directories(LibDwarf::LibDwarf INTERFACE ${LibDwarf_LIBRARY_DIRS})
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target_link_libraries(LibDwarf::LibDwarf INTERFACE ${LibDwarf_LIBRARIES})
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endif()
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