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CMake/Modules/FindICU.cmake
Brad King 86578eccf2 Simplify CMake per-source license notices 
Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace CMake per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online information
available from "https://cmake.org/licensing".  The online URL also handles
cases of modules being copied out of our source into other projects, so we
can drop our notices about replacing links with full license text.

Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority
of the replacements mechanically.  Manually fix up shebang lines and trailing
newlines in a few files.  Manually update the notices in a few files that the
script does not handle.
2016-09-27 15:14:44 -04:00

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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindICU
# -------
#
# Find the International Components for Unicode (ICU) libraries and
# programs.
#
# This module supports multiple components.
# Components can include any of: ``data``, ``i18n``, ``io``, ``le``,
# ``lx``, ``test``, ``tu`` and ``uc``.
#
# Note that on Windows ``data`` is named ``dt`` and ``i18n`` is named
# ``in``; any of the names may be used, and the appropriate
# platform-specific library name will be automatically selected.
#
# This module reports information about the ICU installation in
# several variables. General variables::
#
# ICU_VERSION - ICU release version
# ICU_FOUND - true if the main programs and libraries were found
# ICU_LIBRARIES - component libraries to be linked
# ICU_INCLUDE_DIRS - the directories containing the ICU headers
#
# Imported targets::
#
# ICU::<C>
#
# Where ``<C>`` is the name of an ICU component, for example
# ``ICU::i18n``.
#
# ICU programs are reported in::
#
# ICU_GENCNVAL_EXECUTABLE - path to gencnval executable
# ICU_ICUINFO_EXECUTABLE - path to icuinfo executable
# ICU_GENBRK_EXECUTABLE - path to genbrk executable
# ICU_ICU-CONFIG_EXECUTABLE - path to icu-config executable
# ICU_GENRB_EXECUTABLE - path to genrb executable
# ICU_GENDICT_EXECUTABLE - path to gendict executable
# ICU_DERB_EXECUTABLE - path to derb executable
# ICU_PKGDATA_EXECUTABLE - path to pkgdata executable
# ICU_UCONV_EXECUTABLE - path to uconv executable
# ICU_GENCFU_EXECUTABLE - path to gencfu executable
# ICU_MAKECONV_EXECUTABLE - path to makeconv executable
# ICU_GENNORM2_EXECUTABLE - path to gennorm2 executable
# ICU_GENCCODE_EXECUTABLE - path to genccode executable
# ICU_GENSPREP_EXECUTABLE - path to gensprep executable
# ICU_ICUPKG_EXECUTABLE - path to icupkg executable
# ICU_GENCMN_EXECUTABLE - path to gencmn executable
#
# ICU component libraries are reported in::
#
# ICU_<C>_FOUND - ON if component was found
# ICU_<C>_LIBRARIES - libraries for component
#
# Note that ``<C>`` is the uppercased name of the component.
#
# This module reads hints about search results from::
#
# ICU_ROOT - the root of the ICU installation
#
# The environment variable ``ICU_ROOT`` may also be used; the
# ICU_ROOT variable takes precedence.
#
# The following cache variables may also be set::
#
# ICU_<P>_EXECUTABLE - the path to executable <P>
# ICU_INCLUDE_DIR - the directory containing the ICU headers
# ICU_<C>_LIBRARY - the library for component <C>
#
# .. note::
#
# In most cases none of the above variables will require setting,
# unless multiple ICU versions are available and a specific version
# is required.
#
# Other variables one may set to control this module are::
#
# ICU_DEBUG - Set to ON to enable debug output from FindICU.
# Written by Roger Leigh <rleigh@codelibre.net>
set(icu_programs
gencnval
icuinfo
genbrk
icu-config
genrb
gendict
derb
pkgdata
uconv
gencfu
makeconv
gennorm2
genccode
gensprep
icupkg
gencmn)
# The ICU checks are contained in a function due to the large number
# of temporary variables needed.
function(_ICU_FIND)
# Set up search paths, taking compiler into account. Search ICU_ROOT,
# with ICU_ROOT in the environment as a fallback if unset.
if(ICU_ROOT)
list(APPEND icu_roots "${ICU_ROOT}")
else()
if(NOT "$ENV{ICU_ROOT}" STREQUAL "")
file(TO_CMAKE_PATH "$ENV{ICU_ROOT}" NATIVE_PATH)
list(APPEND icu_roots "${NATIVE_PATH}")
set(ICU_ROOT "${NATIVE_PATH}"
CACHE PATH "Location of the ICU installation" FORCE)
endif()
endif()
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
# 64-bit binary directory
set(_bin64 "bin64")
# 64-bit library directory
set(_lib64 "lib64")
endif()
# Generic 64-bit and 32-bit directories
list(APPEND icu_binary_suffixes "${_bin64}" "bin")
list(APPEND icu_library_suffixes "${_lib64}" "lib")
# Find all ICU programs
foreach(program ${icu_programs})
string(TOUPPER "${program}" program_upcase)
set(cache_var "ICU_${program_upcase}_EXECUTABLE")
set(program_var "ICU_${program_upcase}_EXECUTABLE")
find_program("${cache_var}" "${program}"
HINTS ${icu_roots}
PATH_SUFFIXES ${icu_binary_suffixes}
DOC "ICU ${program} executable")
mark_as_advanced(cache_var)
set("${program_var}" "${${cache_var}}" PARENT_SCOPE)
endforeach()
# Find include directory
find_path(ICU_INCLUDE_DIR
NAMES "unicode/utypes.h"
HINTS ${icu_roots}
PATH_SUFFIXES ${icu_include_suffixes}
DOC "ICU include directory")
set(ICU_INCLUDE_DIR "${ICU_INCLUDE_DIR}" PARENT_SCOPE)
# Get version
if(ICU_INCLUDE_DIR AND EXISTS "${ICU_INCLUDE_DIR}/unicode/uvernum.h")
file(STRINGS "${ICU_INCLUDE_DIR}/unicode/uvernum.h" icu_header_str
REGEX "^#define[\t ]+U_ICU_VERSION[\t ]+\".*\".*")
string(REGEX REPLACE "^#define[\t ]+U_ICU_VERSION[\t ]+\"([^ \\n]*)\".*"
"\\1" icu_version_string "${icu_header_str}")
set(ICU_VERSION "${icu_version_string}" PARENT_SCOPE)
unset(icu_header_str)
unset(icu_version_string)
endif()
# Find all ICU libraries
set(ICU_REQUIRED_LIBS_FOUND ON)
foreach(component ${ICU_FIND_COMPONENTS})
string(TOUPPER "${component}" component_upcase)
set(component_cache "ICU_${component_upcase}_LIBRARY")
set(component_cache_release "${component_cache}_RELEASE")
set(component_cache_debug "${component_cache}_DEBUG")
set(component_found "${component_upcase}_FOUND")
set(component_libnames "icu${component}")
set(component_debug_libnames "icu${component}d")
# Special case deliberate library naming mismatches between Unix
# and Windows builds
unset(component_libnames)
unset(component_debug_libnames)
list(APPEND component_libnames "icu${component}")
list(APPEND component_debug_libnames "icu${component}d")
if(component STREQUAL "data")
list(APPEND component_libnames "icudt")
# Note there is no debug variant at present
list(APPEND component_debug_libnames "icudtd")
endif()
if(component STREQUAL "dt")
list(APPEND component_libnames "icudata")
# Note there is no debug variant at present
list(APPEND component_debug_libnames "icudatad")
endif()
if(component STREQUAL "i18n")
list(APPEND component_libnames "icuin")
list(APPEND component_debug_libnames "icuind")
endif()
if(component STREQUAL "in")
list(APPEND component_libnames "icui18n")
list(APPEND component_debug_libnames "icui18nd")
endif()
find_library("${component_cache_release}" ${component_libnames}
HINTS ${icu_roots}
PATH_SUFFIXES ${icu_library_suffixes}
DOC "ICU ${component} library (release)")
find_library("${component_cache_debug}" ${component_debug_libnames}
HINTS ${icu_roots}
PATH_SUFFIXES ${icu_library_suffixes}
DOC "ICU ${component} library (debug)")
include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
select_library_configurations(ICU_${component_upcase})
mark_as_advanced("${component_cache_release}" "${component_cache_debug}")
if(${component_cache})
set("${component_found}" ON)
list(APPEND ICU_LIBRARY "${${component_cache}}")
endif()
mark_as_advanced("${component_found}")
set("${component_cache}" "${${component_cache}}" PARENT_SCOPE)
set("${component_found}" "${${component_found}}" PARENT_SCOPE)
if(${component_found})
if (ICU_FIND_REQUIRED_${component})
list(APPEND ICU_LIBS_FOUND "${component} (required)")
else()
list(APPEND ICU_LIBS_FOUND "${component} (optional)")
endif()
else()
if (ICU_FIND_REQUIRED_${component})
set(ICU_REQUIRED_LIBS_FOUND OFF)
list(APPEND ICU_LIBS_NOTFOUND "${component} (required)")
else()
list(APPEND ICU_LIBS_NOTFOUND "${component} (optional)")
endif()
endif()
endforeach()
set(_ICU_REQUIRED_LIBS_FOUND "${ICU_REQUIRED_LIBS_FOUND}" PARENT_SCOPE)
set(ICU_LIBRARY "${ICU_LIBRARY}" PARENT_SCOPE)
if(NOT ICU_FIND_QUIETLY)
if(ICU_LIBS_FOUND)
message(STATUS "Found the following ICU libraries:")
foreach(found ${ICU_LIBS_FOUND})
message(STATUS " ${found}")
endforeach()
endif()
if(ICU_LIBS_NOTFOUND)
message(STATUS "The following ICU libraries were not found:")
foreach(notfound ${ICU_LIBS_NOTFOUND})
message(STATUS " ${notfound}")
endforeach()
endif()
endif()
if(ICU_DEBUG)
message(STATUS "--------FindICU.cmake search debug--------")
message(STATUS "ICU binary path search order: ${icu_roots}")
message(STATUS "ICU include path search order: ${icu_roots}")
message(STATUS "ICU library path search order: ${icu_roots}")
message(STATUS "----------------")
endif()
endfunction()
_ICU_FIND()
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(ICU
FOUND_VAR ICU_FOUND
REQUIRED_VARS ICU_INCLUDE_DIR
ICU_LIBRARY
_ICU_REQUIRED_LIBS_FOUND
VERSION_VAR ICU_VERSION
FAIL_MESSAGE "Failed to find all ICU components")
unset(_ICU_REQUIRED_LIBS_FOUND)
if(ICU_FOUND)
set(ICU_INCLUDE_DIRS "${ICU_INCLUDE_DIR}")
set(ICU_LIBRARIES "${ICU_LIBRARY}")
foreach(_ICU_component ${ICU_FIND_COMPONENTS})
string(TOUPPER "${_ICU_component}" _ICU_component_upcase)
set(_ICU_component_cache "ICU_${_ICU_component_upcase}_LIBRARY")
set(_ICU_component_cache_release "ICU_${_ICU_component_upcase}_LIBRARY_RELEASE")
set(_ICU_component_cache_debug "ICU_${_ICU_component_upcase}_LIBRARY_DEBUG")
set(_ICU_component_lib "ICU_${_ICU_component_upcase}_LIBRARIES")
set(_ICU_component_found "${_ICU_component_upcase}_FOUND")
set(_ICU_imported_target "ICU::${_ICU_component}")
if(${_ICU_component_found})
set("${_ICU_component_lib}" "${${_ICU_component_cache}}")
if(NOT TARGET ${_ICU_imported_target})
add_library(${_ICU_imported_target} UNKNOWN IMPORTED)
if(ICU_INCLUDE_DIR)
set_target_properties(${_ICU_imported_target} PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${ICU_INCLUDE_DIR}")
endif()
if(EXISTS "${${_ICU_component_cache}}")
set_target_properties(${_ICU_imported_target} PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
IMPORTED_LOCATION "${${_ICU_component_cache}}")
endif()
if(EXISTS "${${_ICU_component_cache_release}}")
set_property(TARGET ${_ICU_imported_target} APPEND PROPERTY
IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(${_ICU_imported_target} PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "CXX"
IMPORTED_LOCATION_RELEASE "${${_ICU_component_cache_release}}")
endif()
if(EXISTS "${${_ICU_component_cache_debug}}")
set_property(TARGET ${_ICU_imported_target} APPEND PROPERTY
IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(${_ICU_imported_target} PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "CXX"
IMPORTED_LOCATION_DEBUG "${${_ICU_component_cache_debug}}")
endif()
endif()
endif()
unset(_ICU_component_upcase)
unset(_ICU_component_cache)
unset(_ICU_component_lib)
unset(_ICU_component_found)
unset(_ICU_imported_target)
endforeach()
endif()
if(ICU_DEBUG)
message(STATUS "--------FindICU.cmake results debug--------")
message(STATUS "ICU found: ${ICU_FOUND}")
message(STATUS "ICU_VERSION number: ${ICU_VERSION}")
message(STATUS "ICU_ROOT directory: ${ICU_ROOT}")
message(STATUS "ICU_INCLUDE_DIR directory: ${ICU_INCLUDE_DIR}")
message(STATUS "ICU_LIBRARIES: ${ICU_LIBRARIES}")
foreach(program IN LISTS icu_programs)
string(TOUPPER "${program}" program_upcase)
set(program_lib "ICU_${program_upcase}_EXECUTABLE")
message(STATUS "${program} program: ${${program_lib}}")
unset(program_upcase)
unset(program_lib)
endforeach()
foreach(component IN LISTS ICU_FIND_COMPONENTS)
string(TOUPPER "${component}" component_upcase)
set(component_lib "ICU_${component_upcase}_LIBRARIES")
set(component_found "${component_upcase}_FOUND")
message(STATUS "${component} library found: ${${component_found}}")
message(STATUS "${component} library: ${${component_lib}}")
unset(component_upcase)
unset(component_lib)
unset(component_found)
endforeach()
message(STATUS "----------------")
endif()
unset(icu_programs)
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