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@ -3,6 +3,8 @@
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# Maintained at https://github.com/Tronic/cmake-modules
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# Please send your improvements as pull requests on Github.
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include(CMakeParseArguments)
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# Find another package and make it a dependency of the current package.
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# This also automatically forwards the "REQUIRED" argument.
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# Usage: libfind_package(<prefix> <another package> [extra args to find_package])
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@ -54,43 +56,138 @@ function (libfind_pkg_detect PREFIX)
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endif()
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endfunction()
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# Extracts a version #define from a version.h file, output stored to <PREFIX>_VERSION.
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# Usage: libfind_version_header(Foobar foobar/version.h FOOBAR_VERSION_STR)
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# Fourth argument "QUIET" may be used for silently testing different define names.
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# libfind_header_path(<PREFIX> [PATHS <path> [<path> ...]] NAMES <name> [name ...] VAR <out_var> [QUIET])
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# Get fullpath of the first found header looking inside <PREFIX>_INCLUDE_DIR or in the given PATHS
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# Usage: libfind_header_path(Foobar NAMES foobar/version.h VAR filepath)
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function (libfind_header_path PREFIX)
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set(options QUIET)
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set(one_value_keywords VAR PATH)
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set(multi_value_keywords NAMES PATHS)
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CMAKE_PARSE_ARGUMENTS(OPT "${options}" "${one_value_keywords}" "${multi_value_keywords}" ${ARGN})
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if (NOT OPT_VAR OR NOT OPT_NAMES)
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message(FATAL_ERROR "Arguments VAR, NAMES are required!")
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endif()
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if (OPT_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "Calling function with unused arguments '${OPT_UNPARSED_ARGUMENTS}'!")
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endif()
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if (OPT_QUIET OR ${PREFIX}_FIND_QUIETLY)
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set(quiet TRUE)
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endif()
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set(paths ${OPT_PATHS} ${PREFIX}_INCLUDE_DIR)
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foreach(name ${OPT_NAMES})
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foreach(path ${paths})
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set(filepath "${${path}}/${name}")
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# check for existance
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if (EXISTS ${filepath})
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set(${OPT_VAR} ${filepath} PARENT_SCOPE) # export path
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return()
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endif()
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endforeach()
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endforeach()
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# report error if not found
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set(${OPT_VAR} NOTFOUND PARENT_SCOPE)
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if (NOT quiet)
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message(AUTHOR_WARNING "Unable to find '${OPT_NAMES}'")
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endif()
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endfunction()
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# libfind_version_n_header(<PREFIX>
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# NAMES <name> [<name> ...]
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# DEFINES <define> [<define> ...] | CONSTANTS <const> [<const> ...]
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# [PATHS <path> [<path> ...]]
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# [QUIET]
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# )
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# Collect all defines|constants from a header inside <PREFIX>_INCLUDE_DIR or in the given PATHS
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# output stored to <PREFIX>_VERSION.
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# This function does nothing if the version variable is already defined.
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function (libfind_version_header PREFIX VERSION_H DEFINE_NAME)
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# Skip processing if we already have a version or if the include dir was not found
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if (${PREFIX}_VERSION OR NOT ${PREFIX}_INCLUDE_DIR)
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# Usage: libfind_version_n_header(Foobar NAMES foobar/version.h DEFINES FOOBAR_VERSION_MAJOR FOOBAR_VERSION_MINOR)
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function (libfind_version_n_header PREFIX)
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# Skip processing if we already have a version
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if (${PREFIX}_VERSION)
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return()
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endif()
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set(quiet ${${PREFIX}_FIND_QUIETLY})
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# Process optional arguments
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foreach(arg ${ARGN})
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if (arg STREQUAL "QUIET")
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set(quiet TRUE)
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set(options QUIET)
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set(one_value_keywords )
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set(multi_value_keywords NAMES PATHS DEFINES CONSTANTS)
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CMAKE_PARSE_ARGUMENTS(OPT "${options}" "${one_value_keywords}" "${multi_value_keywords}" ${ARGN})
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if (NOT OPT_NAMES OR (NOT OPT_DEFINES AND NOT OPT_CONSTANTS))
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message(FATAL_ERROR "Arguments NAMES, DEFINES|CONSTANTS are required!")
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endif()
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if (OPT_DEFINES AND OPT_CONSTANTS)
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message(FATAL_ERROR "Either DEFINES or CONSTANTS must be set!")
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endif()
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if (OPT_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "Calling function with unused arguments '${OPT_UNPARSED_ARGUMENTS}'!")
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endif()
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if (OPT_QUIET OR ${PREFIX}_FIND_QUIETLY)
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set(quiet TRUE)
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set(force_quiet "QUIET") # to propagate argument QUIET
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endif()
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# Read the header
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libfind_header_path(${PREFIX} NAMES ${OPT_NAMES} PATHS ${OPT_PATHS} VAR filename ${force_quiet})
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if (NOT filename)
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return()
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endif()
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file(READ "${filename}" header)
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# Parse for version number
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unset(version_parts)
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foreach(define_name ${OPT_DEFINES})
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string(REGEX MATCH "# *define +${define_name} +((\"([^\n]*)\")|([^ \n]*))" match "${header}")
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# No regex match?
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if (NOT match OR match STREQUAL header)
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if (NOT quiet)
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message(AUTHOR_WARNING "Unable to find \#define ${define_name} \"<version>\" from ${filename}")
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endif()
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return()
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else()
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message(AUTHOR_WARNING "Unknown argument ${arg} to libfind_version_header ignored.")
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list(APPEND version_parts "${CMAKE_MATCH_3}${CMAKE_MATCH_4}")
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endif()
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endforeach()
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# Read the header and parse for version number
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set(filename "${${PREFIX}_INCLUDE_DIR}/${VERSION_H}")
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if (NOT EXISTS ${filename})
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if (NOT quiet)
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message(AUTHOR_WARNING "Unable to find ${${PREFIX}_INCLUDE_DIR}/${VERSION_H}")
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foreach(constant_name ${OPT_CONSTANTS})
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string(REGEX MATCH "${constant_name} *= *((\"([^\;]*)\")|([^ \;]*))" match "${header}")
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# No regex match?
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if (NOT match OR match STREQUAL header)
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if (NOT quiet)
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message(AUTHOR_WARNING "Unable to find ${constant_name} = \"<version>\" from ${filename}")
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endif()
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return()
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else()
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list(APPEND version_parts "${CMAKE_MATCH_3}${CMAKE_MATCH_4}")
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endif()
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endforeach()
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# Export the version string
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string(REPLACE ";" "." version "${version_parts}")
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set(${PREFIX}_VERSION "${version}" PARENT_SCOPE)
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endfunction()
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# libfind_version_header(<PREFIX> <HEADER> <DEFINE_NAME> [PATHS <path> [<path> ...]] [QUIET])
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# Extracts a version #define from a version.h file, output stored to <PREFIX>_VERSION.
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# This function does nothing if the version variable is already defined.
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# Usage: libfind_version_header(Foobar foobar/version.h FOOBAR_VERSION_STR)
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function (libfind_version_header PREFIX VERSION_H DEFINE_NAME)
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# Skip processing if we already have a version
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if (${PREFIX}_VERSION)
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return()
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endif()
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file(READ "${filename}" header)
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string(REGEX MATCH ".*#[ \t]*define[ \t]+${DEFINE_NAME}[ \t]+((\"([^\n]*)\")|([^\n]*))" match "${header}")
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# No regex match?
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if (match STREQUAL header)
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if (NOT quiet)
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message(AUTHOR_WARNING "Unable to find \#define ${DEFINE_NAME} \"<version>\" from ${${PREFIX}_INCLUDE_DIR}/${VERSION_H}")
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endif()
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return()
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set(options QUIET)
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set(one_value_keywords )
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set(multi_value_keywords PATHS)
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CMAKE_PARSE_ARGUMENTS(OPT "${options}" "${one_value_keywords}" "${multi_value_keywords}" ${ARGN})
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if (OPT_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "Calling function with unused arguments '${OPT_UNPARSED_ARGUMENTS}'!")
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endif()
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# Export the version string
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set(${PREFIX}_VERSION "${CMAKE_MATCH_3}${CMAKE_MATCH_4}" PARENT_SCOPE)
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if (OPT_QUIET OR ${PREFIX}_FIND_QUIETLY)
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set(force_quiet "QUIET") # to propagate argument QUIET
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endif()
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libfind_version_n_header(${PREFIX} NAMES ${VERSION_H} PATHS ${OPT_PATHS} DEFINES ${DEFINE_NAME} ${force_quiet})
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set(${PREFIX}_VERSION "${${PREFIX}_VERSION}" PARENT_SCOPE)
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endfunction()
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# Do the final processing once the paths have been detected.
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