FindICU: Search for packaged data files

The files Makefile.inc and pkgdata.inc are installed by ICU to
<libdir>/icu and on some distributions to <libdir>/<arch>/icu.
These are required by ICU tools like pkgdata, and so are needed
by other package build systems at build time, in addition to the
libraries and executables already searched for.

Search for the files and create cache entries for them, as done
for executables.

Modules/FindICU.cmake

@@ -55,6 +55,11 @@
 #   ICU_<C>_FOUND - ON if component was found
 #   ICU_<C>_LIBRARIES - libraries for component
 #
+# ICU datafiles are reported in::
+#
+#   ICU_MAKEFILE_INC - Makefile.inc
+#   ICU_PKGDATA_INC - pkgdata.inc
+#
 # Note that ``<C>`` is the uppercased name of the component.
 #
 # This module reads hints about search results from::
@@ -100,6 +105,10 @@ set(icu_programs
   icupkg
   gencmn)
 
+set(icu_data
+  Makefile.inc
+  pkgdata.inc)
+
 # The ICU checks are contained in a function due to the large number
 # of temporary variables needed.
 function(_ICU_FIND)
@@ -116,32 +125,8 @@ function(_ICU_FIND)
     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")
-  list(APPEND icu_include_suffixes "include")
-
-  # 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
+  list(APPEND icu_include_suffixes "include")
   find_path(ICU_INCLUDE_DIR
             NAMES "unicode/utypes.h"
             HINTS ${icu_roots}
@@ -156,12 +141,36 @@ function(_ICU_FIND)
 
     string(REGEX REPLACE "^#define[\t ]+U_ICU_VERSION[\t ]+\"([^ \\n]*)\".*"
       "\\1" icu_version_string "${icu_header_str}")
+    set(ICU_VERSION "${icu_version_string}")
     set(ICU_VERSION "${icu_version_string}" PARENT_SCOPE)
     unset(icu_header_str)
     unset(icu_version_string)
   endif()
 
+  if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    # 64-bit binary directory
+    set(_bin64 "bin64")
+    # 64-bit library directory
+    set(_lib64 "lib64")
+  endif()
+
+
+  # Find all ICU programs
+  list(APPEND icu_binary_suffixes "${_bin64}" "bin")
+  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 all ICU libraries
+  list(APPEND icu_library_suffixes "${_lib64}" "lib")
   set(ICU_REQUIRED_LIBS_FOUND ON)
   foreach(component ${ICU_FIND_COMPONENTS})
     string(TOUPPER "${component}" component_upcase)
@@ -233,6 +242,32 @@ function(_ICU_FIND)
   set(_ICU_REQUIRED_LIBS_FOUND "${ICU_REQUIRED_LIBS_FOUND}" PARENT_SCOPE)
   set(ICU_LIBRARY "${ICU_LIBRARY}" PARENT_SCOPE)
 
+  # Find all ICU data files
+  if(CMAKE_LIBRARY_ARCHITECTURE)
+    list(APPEND icu_data_suffixes
+      "${_lib64}/${CMAKE_LIBRARY_ARCHITECTURE}/icu/${ICU_VERSION}"
+      "lib/${CMAKE_LIBRARY_ARCHITECTURE}/icu/${ICU_VERSION}"
+      "${_lib64}/${CMAKE_LIBRARY_ARCHITECTURE}/icu"
+      "lib/${CMAKE_LIBRARY_ARCHITECTURE}/icu")
+  endif()
+  list(APPEND icu_data_suffixes
+    "${_lib64}/icu/${ICU_VERSION}"
+    "lib/icu/${ICU_VERSION}"
+    "${_lib64}/icu"
+    "lib/icu")
+  foreach(data ${icu_data})
+    string(TOUPPER "${data}" data_upcase)
+    string(REPLACE "." "_" data_upcase "${data_upcase}")
+    set(cache_var "ICU_${data_upcase}")
+    set(data_var "ICU_${data_upcase}")
+    find_file("${cache_var}" "${data}"
+      HINTS ${icu_roots}
+      PATH_SUFFIXES ${icu_data_suffixes}
+      DOC "ICU ${data} data file")
+    mark_as_advanced(cache_var)
+    set("${data_var}" "${${cache_var}}" PARENT_SCOPE)
+  endforeach()
+
   if(NOT ICU_FIND_QUIETLY)
     if(ICU_LIBS_FOUND)
       message(STATUS "Found the following ICU libraries:")
@@ -334,6 +369,15 @@ if(ICU_DEBUG)
     unset(program_lib)
   endforeach()
 
+  foreach(data IN LISTS icu_data)
+    string(TOUPPER "${data}" data_upcase)
+    string(REPLACE "." "_" data_upcase "${data_upcase}")
+    set(data_lib "ICU_${data_upcase}")
+    message(STATUS "${data} data: ${${data_lib}}")
+    unset(data_upcase)
+    unset(data_lib)
+  endforeach()
+
   foreach(component IN LISTS ICU_FIND_COMPONENTS)
     string(TOUPPER "${component}" component_upcase)
     set(component_lib "ICU_${component_upcase}_LIBRARIES")