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# CMake provides a FindICU module since version 3.7.
# But it doesn't use pkgconfig, doesn't set expected variables,
# And it returns incomplete dependencies if only some modules are searched.
#[=======================================================================[.rst:
FindICU
-------
Finds components of the ICU library.
Accepted components are: uc, i18n, le, lx, io
Result Variables
^^^^^^^^^^^^^^^^
This will define the following variables:
``ICU_FOUND``
True if components of ICU library are found.
``ICU_VERSION``
The version of the ICU library which was found.
``ICU_<c>_FOUND``
True if the system has the <c> component of ICU library.
``ICU_<c>_INCLUDE_DIRS``
Include directories needed to use the <c> component of ICU library.
``ICU_<c>_LIBRARIES``
Libraries needed to link to the <c> component of ICU library.
#]=======================================================================]
find_package(PkgConfig QUIET)
set(ICU_KNOWN_COMPONENTS "uc" "i18n" "le" "lx" "io")
foreach(MOD_NAME IN LISTS ICU_FIND_COMPONENTS)
if(NOT MOD_NAME IN_LIST ICU_KNOWN_COMPONENTS)
message(FATAL_ERROR "Unknown ICU component: ${MOD_NAME}")
endif()
pkg_check_modules(PC_ICU_${MOD_NAME} QUIET icu-${MOD_NAME})
# Check the libraries returned by pkg-config really exist.
unset(PC_LIBRARIES)
foreach(LIBRARY IN LISTS PC_ICU_${MOD_NAME}_LIBRARIES)
unset(PC_LIBRARY CACHE)
find_library(PC_LIBRARY NAMES ${LIBRARY})
if(NOT PC_LIBRARY)
unset(PC_ICU_${MOD_NAME}_FOUND)
endif()
list(APPEND PC_LIBRARIES ${PC_LIBRARY})
endforeach()
unset(PC_LIBRARY CACHE)
if(${PC_ICU_${MOD_NAME}_FOUND})
set(ICU_COMPONENT_FOUND TRUE)
set(ICU_${MOD_NAME}_FOUND TRUE)
set(ICU_${MOD_NAME}_LIBRARIES ${PC_LIBRARIES})
set(ICU_${MOD_NAME}_INCLUDE_DIRS ${PC_ICU_${MOD_NAME}_INCLUDE_DIRS})
set(ICU_VERSION ${PC_ICU_${MOD_NAME}_VERSION})
endif()
endforeach()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(ICU
FOUND_VAR ICU_FOUND
REQUIRED_VARS ICU_COMPONENT_FOUND
VERSION_VAR ICU_VERSION
HANDLE_COMPONENTS
)
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