1 files changed, 64 insertions, 0 deletions
diff --git a/cmake/FindICU.cmake b/cmake/FindICU.cmake
new file mode 100644
index 000000000..471e43c1d
--- /dev/null
+++ b/cmake/FindICU.cmake
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+#[=======================================================================[.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
+)